Installation Instructions Nash Liquid Ring Vacuum Pump and Compresors CL SC 904 Vectra TC 2BE P2620...
Bulletin No. 642-J
Installation Instructions
NASH Liquid Ring Vacu Va cuum um Pump Pu mps s and an d Comp Co mpre ress ssor ors s CL · SC · 904 · Vectra · TC · 2BE · P2620
2
Bulletin 642-J
WARNING Do not operate until pump is initially primed and connected to constant supply of clean compressant liquid. IF RUN DRY, PUMP WILL BE DAMAGED. Always use strainer to prevent sand and scale from entering the pump with liq uid. Certain operating conditions in combination with water hardness may result in excessive lime deposits within the pump, causing it to bind. Should this condition be evident, flush pump with a solvent at regular intervals. This pump has been drained and flushed with a water-soluble preservative oil prior to shipment. After pump has been in service, do not store without draining as specified within this Bulletin. Pump can be damaged by freezing. Dispose of oil properly. USE CAUTION when removing inlet screens. Any foreign material on screen may fall into pump and cause extensi ve damage at start-up. Base must be mounted to a leveled foundation and final coupling alignment done during ins tallation.
NOTICE SERVICE AND PARTS SERVICE AND PARTS FOR NASH PUMPS ARE ASS URED THROUGH A WORLDWIDE NETWORK OF SALES AND SERVICE OFFICES LISTED ON THE BACK COV ER OF THIS BULLETIN. ANY REQUEST FOR INFORMATION, SERVICE AND PARTS SHOULD BE DIRECTED TO THE NEAREST NASH FIELD OFFICE. WHEN ORDERING REPLACEMENT AND SPARE PARTS, TEST NUMBERS AND PU MP SIZES MUST BE PROVIDED. Test number and pump size are located on nameplate fastened to body of pump. If nameplate has been destroyed, test number will be found stamped on the body. Parts must be identified by index numbe r and name. Refer to pump exploded view and legend, found within this Bulletin. If the location of the nearest office is unknown, information may be secured directly from: Gardner Denver Nash LLC, Trumbull, Connecticut 06611-1330, U.S.A. Tel. No.
203-459-3900
Fax No.
203-459-3988
Email
[email protected]
NASH Installation Instructions
3
Contents 1.
Uncrating ................................................................................................................................... 5
2. 2.1 2.1.1 2.1.2 2.2 2.3 2.4 2.5
Services Required..................................................................................................................... 5 Piping ......................................................................................................................................... 5 Vacuum Pump Discharge Piping ................................................................................................ 8 Compressor Discharge Piping ..................................................................................................... 8 Liquid Compressant (Seal Water)................................................................................................ 8 Lantern Gland or Mechanical Seal Liquid .................................................................................... 8 Drains ......................................................................................................................................... 8 Power Supply ............................................................................................................................. 8
3. 3.1 3.2 3.3 3.4 3.5 3.6 3.7
INSTALLATION ......................................................................................................................... 9 Location ...................................................................................................................................... 9 Foundation .................................................................................................................................. 9 Setting Base, Soleplate or Pump ................................................................................................ 9 Grouting ...................................................................................................................................... 9 Piping Installation ....................................................................................................................... 9 Coupling Alignment ................................................................................................................... 16 V-Belt Drive Alignment ............................................................................................................. 21
List of Illustrations Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Figure 21.
Typical Piping Arrangements for CL, SC, TC, P2620, Vectra, and 904 ® Vacuum Pumps............ 6 Typical Piping Arrangements for 2BE Vacuum Pumps ............................................................... 7 Recommended Flexible Connections for Inlet Header Piping, CL-2000 through CL-14000 Series Pumps ................................................................................. 10 Recommended Flexible Connections for Inlet Header Piping, 904 ® , 2BE Pump Models, and P2620 ...................................................................................... 10 Typical Mufflers with Separating Tee and Water Trap Silencer for Vacuum Pumps with Horizontal, Front or Side Discharge Connections ..................................... 11 Recommended flexible connections from bottom discharge port to trench, CL-4000 through CL-14000 Series Pumps ................................................................................. 12 Recommended flexible connections from bottom discharge port to trench, P2620 and 904 ® pump models ................................................................................................. 12 Typical Piping Arrangement for Horizontal Inlet Compressor with Separator ............................. 12 Typical Piping Arrangements for CL, SC, P2620, Vectra, and 904 ® Compressors ..................... 13 Typical Piping Arrangements for 2BE Compressors .................................................................. 14 Foundation Bolt Installation and Grouting.................................................................................. 15 Foundation Bolt Installation and Grouting.................................................................................. 16 Preparing Foundation Bolt Pads and Installing and Grouting Skids ........................................... 16 Types of Misalignment ............................................................................................................. 17 Coupling Assembly Dimension, CL-2000 through CL-14000 Series Pumps ............................... 17 Coupling Assembly Dimension, P2620 and 904 ® Pump Models ................................................ 18 Falk Type T10/1000G82 Couplings Installation ......................................................................... 19 Checking Alignment with Dial Indicator ..................................................................................... 20 Four-Point V-Belt Alignment Method ......................................................................................... 21 V-Belt Center-Distance Determination ....................................................................................... 23 Checking V-Belt Tension .......................................................................................................... 23
List of Tables Table 1. Table 2. Table 3. Table 4.
4
Seal Water Minimum Pressure ................................................................................................... 8 Conventional Belt Drive Installation Dimensions ....................................................................... 22 Ultra V-Belt Drive Installation Dimensions................................................................................. 22 V-Belt Tension .......................................................................................................................... 23
Bulletin 642-J
1. Uncrating Note - The term "pump" and "vacuum pump" in this Bulletin apply to both vacuum pumps and compressors unless otherwise noted. a. Check all parts against the shipping list received with the pump. Inspect the pump for possible shipping damage. Report any shortage or damage at once to the local agent of the carrier. b. Pumps and their drive motors are normally shipped from the factory mounted on a base, with coupling halves separated or V-belts removed in order to prevent damage from springing of the base during shipment. Coupling assembly parts are shipped in a bag fastened to the shaft under the coupling guard or in a separate container, depending on the size and type of coupling. V-belts and other accessories are usually shipped in a separate container that is attached to the pump shipping crate. MAKE CERTAIN THAT COUPLING ASSEMBLY PARTS, V-BELTS, AND OTHER ACCESSORIES ARE IDENTIFIED AND KEPT IN A SAFE PLACE UNTIL THEY ARE INSTALLED ON THE PUMP IN ORDER TO AVOID LOSS OR DAMAGE. c. Handle the pump by lifting it evenly at four or more points of the base.
2. Services
d. The shaft of the driver (motor, gear reducer, turbine, etc.) is not in alignment with the shaft of the pump when received. Proper alignment can be established correctly only after the base is leveled and secured to its permanent foundation and all pipe connections have been made to the pump. NASH does not provide this service unless a NASH Field Service Technician is specifically requested. e. If the pump and the driver are not to be installed and operated shortly after receipt, store them in a clean, dry place. Rotate the pump shaft every two weeks to coat the bearings with lubricant to retard oxidation and corrosion. Although the pump is flushed with a water-soluble preservative oil prior to shipment, refer to the Operation and Maintenance Bulletin for your unit for storage procedures. f. Before starting the vacuum pump upon completion of alignment, remove the seal water drain plugs. Open the service liquid shut-off valve. Allow the service liquid to flow until there is a clear flow from all drains. Although the vacuum pump is flushed with inhibiting oil prior to shipment, a light film of rust may form before installation is complete. This film will disappear after the pump shaft has been manually rotated a few times. Close the service liquid shut off valve. Replace the service liquid drain plugs using a pipe thread sealant.
Required
2.1 Piping Note - Refer to the NASH installation drawing(s) supplied with your unit for specific piping requirements. a. Inlet (See Figure 1.) Connect the vacuum pump inlet full size to the process. Connect the compressor inlet full size to the process or to the atmosphere. When connecting pumps with two inlets (CL Series, 2BE, P2620 and 904 ® Pumps) together, the inlets should be manifolded to a larger pipe size. The pipe area must be equal to, or greater than, the total area of the two connected inlets. In those cases in which the length of the piping run for the inlet exceeds 75 feet (23 meters) on pumps whose inlets are 2 inches (50 mm) or less, or in those cases in which the length exceeds 150 feet (46 meters) on pumps whose inlets are larger, use the next larger pipe size over the entire length of the piping run.
Note - A flexible connection for the inlet header piping is recommended to eliminate pipe strain and facilitate removal or testing for the following pumps: CL-2000 through CL-14000 Series as shown in Figure 3; 2BE, P2620, and 904 ® Pumps as shown in Fig. 4. b. Strainer Connect a strainer, cleanout, dirt pocket, or a combination of the three in all liquid seal lines ahead (upstream) of the pump to prevent dirt and other foreign matter from entering the pump during operation. On recirculated seal systems, ensure that a strainer is installed in the return line from the air/water separator and ahead (upstream) of the heat exchanger, recirculation pump, and the vacuum pump.
NASH Installation Instructions
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1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15)
Arrangement A
16) 17) 18) 19) 20) 21) 22) 23) 24) 25) 26)
Inlet Check Valve (See note 2) Clean-out (See note 7) Vapor Discharge Separator Reducer (if necessary, see note 3.) Vacuum Pump Orifice Union Pressure Gauge (See note 1) Seal Supply Temporary Screens, Preferred Location (See note 4) Temporary Screens, Alternate Location (See note 4) Dirt Pocket (See note 6) Inlet From System Maximum Height of Drain Loop No Higher than Centerline of Pump Shaft Vent Drain Maximum Operating Level No Higher than Centerline of Pump Shaft Equalizer Line (1 inch minimum, see note 5) Seal Liquid Inlet Adjusting Cock Initial Prime Bypass Solenoid Valve Strainer Seal-line Isolation Valve Vacuum Gauge
Arrangement B if necessary
NOTES: 1. Typical piping arrangements shown; make certain to refer to the NASH installation drawing(s) supplied with your unit for specific piping requirements and seal supply pressure. 2. The inlet check valve must be installed in horizontal line only for proper operation. An inlet check valve is not requir ed for filter applications or where vacuum will not be maintained on pump shutdown. 3. The distance between the pump and the separator should be kept to a minimum. The liquid level in the separator should never be allowed to be higher than the pump shaft centerline. The pump discharge connections and separator inlet connection are not always the same size. Refer to the NASH installation drawing(s) supplied with your unit for connection sizes. 4. Stainless steel temporary screens will be supplied by NASH for protection from foreign material during the start-up period. One screen (coarse mesh) will be supplied with iron pumps. Two screens (fine and coarse mesh) will be supplied with stainless steel pumps. The fine mesh screen should be installed on the upstream side of the coarse mesh screen. All temporary screens should be cleaned after initial start-up. When all debris has been removed, the screens should be removed. 5. If a slightly elevated pump discharge is necessary, an equalizer line is used to balance the liquid level between the pump and the separator. 6. Avoid long vertical drops (refer to dimension X) of 10 feet (3 meters) or more directly into the pump by diverting the stream as shown. If the gas stream has a possibility of dirt carry-over, install a dirt pocket. A dirt pocket is mandatory for stainless steel pump installations. 7. Install clean-out in this location when temporary screen is used in alternate location (item 11). If temporary screen is installed in preferred location (item 10), use dirt pocket (item 12) for clean out.
Figure 1. Typical Piping Arrangements for CL, SC, TC, P2620, V ectra, and 904 ® Vacuum Pumps 6
Bulletin 642-J
3 1 1
10
10
14 13
14
13
3
4
4 X X 2
17
2
16
12
11
12
11 15
8 8
23
23 18
17 5 19
6
20
7
21
22
24
25
TO OPEN DRAIN
6
20
7
21
22
24
25
9
9
TO OPEN DRAIN
Arrangement A
Arrangement B if necessary (2BE3 Models only)
1) 2) 3) 4) 5) 6) 7) 8) 9) 10)
Inlet Check Valve (See note 2) Clean-out (See note 7) Vapor Discharge Separator Reducer (if necessary, see note 3.) Vacuum Pump Orifice Union Pressure Gauge (See note 1) Seal Supply Temporary Screens, Preferred Location (See note 4) 11) Temporary Screens, Alternate Location (See note 4) 12) Dirt Pocket (See note 6) 13) Inlet
14) From System 15) Maximum Height of Drain Loop No Higher than Centerline of Pump Shaft 16) Vent 17) Drain 18) Maximum Operating Level No Higher than Centerline of Pump Shaft 19) Equalizer Line (1 inch minimum, see note 5) 20) Seal Liquid Inlet 21) Adjusting Cock 22) Initial Prime Bypass 23) Solenoid Valve 24) Strainer 25) Seal-line Isolation Valve 26) Vacuum Gauge
NOTES: 1. Typical piping arrangements shown; make certain to refer to the NASH installation drawing(s) supplied with your unit for specific piping requirements and seal supply pressure. 2. The inlet check valve must be installed in horizontal line only for proper operation. An inlet check valve is not required for filter applications or where vacuum will not be maintained on pump shutdown. 3. The distance between the pump and the separator should be kept to a minimum. The liquid level in the separator should never be allowed to be higher than the pump shaft centerline. The pump discharge connections and separator inlet connection are not always the same size. Refer to the NASH installation drawing(s) supplied with your unit for connection sizes. 4. Stainless steel temporary screens will be supplied by NASH for protection from foreign material during the start-up period. One screen (coarse mesh) will be supplied with iron pumps. Two screens (fine and coarse mesh) will be supplied with stainless steel pumps. The fine mesh screen should be installed on the upstream side of the coarse mesh screen. All temporary screens should be cleaned after initial start-up. When all debris has been removed, the screens should be removed. 5. If a slightly elevated pump discharge is necessary, an equalizer line is used to balance the liquid level between the pump and the separator. 6. Avoid long vertical drops (refer to dimension X) of 10 feet (3 meters) or more directly into the pump by diverting the stream as shown. If the gas stream has a possibility of dirt carry-over, install a dirt pocket. A dirt pocket is mandatory for stainless steel pump installations. 7. Install clean-out in this location when temporary screen is used in alternate location (item 11). If temporary screen is installed in preferred location (item 10), use dirt pocket (item 12) for clean out.
Figure 2. Typical Piping Arrangements for 2BE Vacuum Pumps NASH Installation Instructions
7
c. Inlet Screens and Dirt Pockets Temporary inlet screens are furnished with all flanged inlet pumps. Figure 1 & 2 show piping installation examples that permit cleaning of temporary inlet screens prior to the removal of those screens and the use of dirt pockets to provide continuous protection during operation. d. Check Valves Install check valves in horizontal piping only. Make certain that check valves are installed with the proper direction of flow and in the specified mounting position. 2.1.1
Vacuum Pump Discharge Piping
Vacuum pump discharge piping should be full size from the pump to a suitable separating system. (See Figures 1, 2 and 5.) The discharge line before this separator should not run above the pump centerline unless specifically indicated on the installation drawing. The seal liquid discharge line from a vacuum pump separator should flow by gravity to a suitable drai n. The air line should be piped full size to a venting location. Note - Where the alternate bottom discharge ports are used on vacuum pumps and compressors, flexible connections are recommended as shown in Figure 6 for CL-4000 through CL-14000 Series and Figure 6 for 904 ® Pumps, and P2620. 2.1.2
Type of Service
*Minimum Pressure in psig (kPa†) at Pump/Compressor Connections
Vacuum Pumps
5(136)
Small Compressors, 5 HP (3.7 kW) or less
5(136)
Compressors, Below 40 psig (377 kPa)
20(239)
Compressors, Above40 psig (377 kPa)
35(343)
Recirculated Water (Nash Supplied Heat Exchanger)
5 (136) pressure drop across heat exchanger
† Metric conversions are absolute pressures. *Indicated pressure is that required at pump/compressor connections. Normally, certain controls will be required ahead of this connection for start and stop flow of water and to assist in adjustment of water quantities. When these additional controls are used, the pressure drop through these controls must be added to the pressure required at the vacuum pump/compressor. Add the following to pressures at the vacuum pump/compressor in order to determine necessary minimum supply pressure. Orifice Control 10 psig (170 kPa) Flow Control Valve 15 psig (205 kPa) Solenoid Control Valve 10 psig (170 kPa)
Compressor Discharge Piping
Compressor discharge should be piped to a separator located as near to the compressor as possible. (See Figures 8, 9 and 10.) The discharge line from the compressor separator should be piped full size to the receiver or system.
Example: A vacuum pump with a seal water flow control and a solenoid control valve: Pressure at Vacuum Pump 5 psig (136 kPa) Flow Control Valve 15 psig (205 kPa) Solenoid Valve 10 psig (170 kPa)
The seal liquid discharge line from the separator should flow by gravity to a suitable drain.
Thus, the minimum supply pressure required for this vacuum pump is 30 psig (308 kPa).
2.2 Liquid Compressant (Seal Water) Liquid compressant (usually water) in an adequate quantity and at a minimum pressure specified in Table I is required for proper pump operation. The coolest water available will normally produce best pump performance.
2.3 Lantern Gland or Mechanical Seal Liquid A clean supply of liquid (usually water) should be furnished. Valves should be included in this piping to regulate the liquid flow and pressure. On units where the piping is installed on the equipment as received, additional controls are not required.
2.4 Drains Drains must be sized to permit gravity flow from separators at a rate equal to that supplied to the pump. 8
Total 30 psig (308 kPa)
Table 1. Seal Water Minimum Pressure
Should a liquid carryover from the system to the pump inlet be anticipated, this quantity must also be included in sizing the drains.
2.5 Power Supply Voltage available must match motor nameplate data and also that indicated for solenoid valves, when they are supplied or required. Solenoid voltage may be different from motor voltage. Starters and supply lines must be sized to match power requirements.
Bulletin 642-J
3. INSTALLATION 3.1 Location The pump should be located in a readily and completely accessible location that is protected against flooding, freezing, excessive moisture and from overhead dripping. Provision should be made to permit proper piping arrangement and dismantling. The location should provide clearance for the minimum distance necessary to servi ce the pump as specified on the NASH installation drawin g(s) supplied with your unit.
3.2 Foundation The foundation must form a rigid support for the pump in order to maintain proper alignment. The foundation must be placed on hard, compacted soil or on piles that have been driven to a sufficient depth so that they are resting on hard, compacted soil. Pour concrete to a height that is within 1/2 to 1-1/2 inch (13 to 38 mm) of the finished foundation. Install foundation bolts as specified in Figure 11, located according to the prints supplied with your pump, and set as shown in Part A of Figure 11. Use pipe sleeves that are two or three diameters larger than the bolt, permitting the bolts to be moved to conform to the soleplate slot locations after the concrete is poured. Under all conditions, the foundation at each foundation bolt location must be smooth and all at the same level. A metal plate leveled in mortar or grout is one easy way to achieve this level and smooth surface. (See Figure 13.) Shims may be used to make the final adjustment to provide this, level surface. The plate or shim area should be such that. the loading does not exceed 300 pounds per square inch (4267 kilograms per square centimeter). The foundation should be allowed to cure for several days before mounting and aligning the equipment.
3.3 Setting Base, Soleplate or Pump Bases are designed to support the pump and driver when rigidly supported at all foundation bolt locations. Soleplates must be grouted carefully to supply a rigid support under the full area of the soleplate. Pumps mounted without soleplates must be rigidly supported on a smooth surface which is at the same level at each foot. Once the foundation bolt locations have been checked and leveled with each other, carefully install base, soleplate or pump. If skids are used, place the pump and skid on the foundation, shimming as necessary under the foundation bolts. Remove the pump for final leveling and shimming. Before tightening the foundation bolts, shim under each as shown in Figure 13. Tighten foundation bolts securely. With a soleplate, check that the top-of the soleplate is level. With skids and bases, check to assure that final coupling or V-belt drive alignment can be established.
If alignment within the tolerances specified in Paragraph 3.6 or 3.7 cannot be obtained, recheck for tightness of foundation bolts and for level foundation under foundation bolts.
3.4 Grouting When a soleplate is used in the pump installation, grout between the soleplate and foundation in order to fill irregularities and provide uniform load distribution. Use a grouting that is a high-strength, non-shrinking, non-expanding mixture. The concrete foundation surface should be prepared for better adhesion prior to applying the grout. Acid etching or chipping of the surface is recommended. Note - For foundation bolt installation and grouting of CL, SC, TC, 904 ® , 2BE, and P2620 Models see Figure 12. If the base is fabricated from structural shapes, fill it with grout. Pack or rod to fill the space between the base and the foundation completely. (See Part B of Figure 11.) If the base is a formed steel base (non- self supporting) pack grout under the edge of the base. A small form may be constructed to contain and shape the grout, as shown in Part C of Figure 11.)
Note - If the formed steel base is installed on a steel structure with no grout, additional support or fastening is required along the length of the base. If skids are used, refer to Figure 13 for grouting. Allow the grout to set completely before attempting any alignment.
3.5 Piping Installation Note - The pump is shipped with thread or flange protectors installed in all open connection points to prevent damage to the pump. Remove these protectors before making piping connections. Refer to the NASH installation drawing(s) supplied with your unit for specific piping requirements. Refer to Paragraph 2.1, 2.1.1 and 2.1.2 for general piping requirements. Piping should be connected to the pump without strain, because pipe strain on pump castings may cause hard to trace troubles after the pump is in operation Coupling misalignment, rubbing of internal parts shortened mechanical
NASH Installation Instructions
9
1. Hose Clamp (2 required) 2. Neoprene Composition Hose (1/2-Inch Thick)
1. 2. 3. 4. 5. NOTES:
Hose Clamp (2 Required) Neoprene Composition Hose 1/2-Inch Thick Inlet Screen Pump Inlet (2 per Pump) Cleanout (6-Inch NPS Min)
NOTE:
1. Hose and hose clamps not furnished by NASH.
1. Dimensions are in inches with dimensions in millimeters shown in parentheses.
2. Dimensions are in inches with dimensions in millimeters shown in parentheses.
Figure 3. Recommended Flexible Connections for Inlet Header Piping, CL-2000 through CL-14000 Series Pumps
Figure 4. Recommended Flexible Connections for Inlet Header Piping, 904 ® , 2BE Pump Models, and P2620
seal or bearing life are a few of the things that can be caused by pipe strain.
Care should be taken to remove any foreign matter from piping by flushing before connecting to the pump.
Piping should be erected so that it can be connected to the pump without springing or pulling on the piping. No strain should be transmitted to the pump from piping suction a nd discharge piping should be supported near the pump with provision for expansion to prevent strain from pipe expansion, bending or twisting forces.
Water connections should be made full size to the pump, and properly supported. A strainer in this line is required to prevent rust and scale from entering the pump.
A proper cleanout or removable pipe section should be installed ahead of the pump so that temporary inlet screens may be cleaned of foreign material before their removal. Dirt pockets are an inexpensive form of insurance which protect the pump from entry of pipe scale, tramp metal or foreign material which may be present in the inlet piping. Dirt pockets are required for stainless steel pu mp installations. Figures 1 and 9 show examples of piping installations which permit cleaning of temporary inlet screens prior to their removal and continuous operating protection by the use of dirt pockets. In all instances where a 4-inch (102-mm) cleanout is shown, a flanged tee or removable pipe section will usually serve a similar function. Flexible piping connections are required on installations where pump is to be mounted on vibration isolation bases. 10
Bulletin 642-J
Caution - When piping connections to the pump are complete, recheck coupling or vbelt drive alignment as specified in paragraph 3.6 or 3.7. If alignment is not within the limits specified, check all piping connections for strain and correct.
MUFFLERS WITH SEPARATING TEE WATER TRAP SILENCER 1. 2. 3. 4. 5.
Muffler Separating Tee Connection to Pump Discharge (See Note 2.) Dr ain Vent
6. 7. 8. 9.
Air Inlet Water Outlet Muffler Drain Air Outlet
NOTES: 1. For specific dimensions, refer to the NASH installation drawing(s) supplied with your unit. 2. The connection to the pump discharge must beat the same elevation as the pump discharge. 3. All pipe threads are American Standard. 4. Dimensions are in inches with dimensions in millimeters shown in parentheses.
Figure 5. Typical Mufflers with Separating Tee and Water Trap Silencer for Vacuum Pumps with Horizontal, Front or Side Discharge Connections
NASH Installation Instructions
11
1. Pump Bottom Discharge 2. Pipe Flange 3. Neoprene Composition Hose 4. Concrete Foundation 5. Hose Clamp (2 Required) NOTES: 1. Items 2 through 5 not furnished by NASH . 2. Pipe flange (2) does not have to be cut to match the flats on some pump discharge flanges.
1. 2. 3. 4. 5. 6. NOTES:
1. Items 1, 3, 4 and 5 not furnished by NASH.
3. Dimensions are in inches with dimensions in millimeters shown in parentheses.
Figure 6. Recommended flexible connections from bottom discharge port to trench, CL-4000 through CL-14000 Series Pumps
1. 2. 3.
Check Valve Orifice Union Separator (On Outer Side)
4. 5.
Neoprene Composition Hose (1 /2-inch Thick) Pump Bottom Discharge (2 per Pump) ANSI CL150 Flat Face Flange Hose Clamp (2 Required) Trench Discharge Pipe Concrete Foundation
2. Dimensions are in inches with dimensions in millimeters shown in parentheses.
Figure 7. Recommended flexible connections from bottom discharge port to trench, P2620 and 904 ® pump models
Compressor Vent Line with Check Valve (To Compressor)
6. 7. 8.
Muffler (On Inlet Side) Check Valve Drain Plug
9. 10.
Separator Drain Discharge to System
NOTE: Typical piping arrangements shown; make certain to refer to the NASH installation drawing(s) supplied with your unit for specific piping arrangements.
Figure 8. Typical Piping Arrangement for Horizontal Inlet Compressor with Separator 12
Bulletin 642-J
Arrangement A 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11)
¼” Bleeder Line (See note 2) Start-up Bypass Valve (See note 3) Discharge Check Valve (See note 4) To System Separator D ra in Reducer (if necessary) (See note 5) Clean-out (See note 9) Compressor Orifice Union Temporary Screens, Alternate Location (See note 6) 12) Seal Supply 13) Pressure Gauge (See note 1)
Arrangement B if necessary 14) 15) 16) 17) 18) 19) 20) 21) 22) 23) 24) 25) 26) 27)
Temporary Screens, Preferred Location (See note 6) Inlet Check Valve (See note 4) Dirt Pocket (See note 8) Inlet Maximum Operating Level No Higher than Centerline of Compressor Shaft Equalizer Line (1 inch minimum, see note 7) From System Ball Float Drain Valve Seal Liquid Inlet Adjusting Cock Initial Prime Bypass Solenoid Valve Strainer Seal-line Isolation Valve
NOTES: 1) Typical piping arrangements shown; make certain to refer to the NASH installation drawing(s) supplied with your unit for specific piping requirements and seal supply pressure. 2) A bleeder line located around the inlet check valve allows venting the compressor on shutdown. 3) A start-up bypass valve is required for proper start-up and should be capable of passing the full rated flow from the compressor. Please note: A bypass line is not required for the SC and Vectra product line. 4) The inlet check valve prevents a slug of water from rushing into the inlet piping when the compressor stops. The discharge check valve maintains system pressure when the compressor stops. Check valves must be installed in horizontal lines for proper operation. 5) The distance between the compressor and the separator should be kept to a minimum. The liquid level in the separator should never be allowed to be higher than the compressor shaft centerline. The compressor discharge connections and separator inlet connections are not always the same size. Refer to the NASH installation drawing(s) supplied with your unit for connection sizes. 6) Stainless steel temporary screens will be supplied by NASH for protection from foreign material during the start-up period. One screen (coarse mesh) will be supplied with iron compressors. Two screens (fine and coarse mesh) will be supplied with stainless steel compressors. The fine mesh screen should be installed on the upstream side of the coarse mesh screen. All temporary screens should be cleaned after initial start-up. When all debris has been removed, the screens should be removed. 7) If a slightly elevated compressor discharge is necessary, an equalizer line is used to balance the liquid level between the compressor and the separator. 8) Avoid long vertical drops (refer to dimension X, of 10 feet (3 meters) or more, directly into the compressor by diverting the stream as shown. If the gas stream has a possibility of dirt carry-ove r, install a dirt pocket. A dirt pocket is mandatory for stainless steel compressor installations. 9) Install a clean-out in this location when temporary screen is used in alternate location (item 11). If temporary screen is installed in preferred location (item 14), use dirt pocket (item 16) for clean-out.
Figure 9. Typical Piping Arrangements for CL, SC, P2620, Vectra, and 904 ® Compressors NASH Installation Instructions
13
1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11)
¼” Bleeder Line (See note 2) Start-up Bypass Valve (See note 3) Discharge Check Valve (See note 4) To System Separator D ra in Reducer (if necessary) (See note 5) Clean-out (See note 9) Compressor Orifice Union Temporary Screens, Alternate Location (See note 6) 12) Seal Supply 13) Pressure Gauge (See note 1) 14) Temporary Screens, Preferred Location (See note 6)
15) 16) 17) 18) 19) 20) 21) 22) 23) 24) 25) 26) 27)
Inlet Check Valve (See note 4) Dirt Pocket (See note 8) Inlet Maximum Operating Level No Higher than Centerline of Compressor Shaft Equalizer Line (1 inch minimum, see note 7) From System Ball Float Drain Valve Seal Liquid Inlet Adjusting Cock Initial Prime Bypass Solenoid Valve Strainer Seal-line Isolation Valve
NOTES: 1) Typical piping arrangements shown; make certain to refer to the NASH installation drawing(s) supplied with your unit for specific piping requirements and seal supply pressure. 2) A bleeder line located around the inlet check valve allows venting the compressor on shutdown. 3) The inlet check valve prevents a slug of water from rushing into the inlet piping when the compressor stops. The discharge check valve maintains system pressure when the compressor stops. Check valves must be installed in horizontal lines for proper operation. 4) The distance between the compressor and the separator should be kept to a minimum. The liquid level in the separator should never be allowed to be higher than the compressor shaft centerline. The compressor discharge connections and separator inlet connections are not always the same size. Refer to the NASH installation drawing(s) supplied with your unit for connection sizes. 5) Stainless steel temporary screens will be supplied by NASH for protection from foreign material during the start-up period. One screen (coarse mesh) will be supplied with iron compressors. Two screens (fine and coarse mesh) will be supplied with stainless steel compressors. The fine mesh screen should be installed on the upstream side of the coarse mesh screen. All temporary screens should be cleaned after initial start-up. When all debris has been removed, the screens should be removed. 6) With a slightly elevated compressor discharge, an equalizer line is used to balance the liquid level between the compressor and the separator. 7) Avoid long vertical drops (refer to dimension X, of 10 feet (3 meters) or more, directly into the compressor by diverting the stream as shown. If the gas stream has a possibility of dirt carry-over, install a dirt pocket. A dirt pocket is mandatory for stainless steel compressor installations. 8) Install a clean-out in this location when temporary screen is used in alternate location (item 11). If temporary screen is installed in preferred location (item 14), use dirt pocket (item 16) for clean-out.
Figure 10. Typical Piping Arrangements for 2BE Compressors 14
Bulletin 642-J
Fig. 11A Foundation section showing alternate foundation bolt arrangement and leveling at foundation bolts
Fig. 9C. Formed steel base
Fig. 9B. Fabricated base filled with grout
1. 2. 3. 4. 5. 6.
Shims Soleplate Plate Grout Alternate Bolt and Washer Foundation Bolt Bend
7. 8. 9. 10. 11. 12. 13.
Concrete Foundation Washer Bolt Sleeve [3 in. (76 mm) long] Base Drip Lip Formed in Grout (Optional) Form Anchor Bolt
NOTE: 1. Dimensions are in inches with dimensions in millimeters in parentheses.
Figure 11. Foundation Bolt Installation and Grouting
NASH Installation Instructions
15
3.6 Coupling Alignment Caution - Couplings should not be forced on the pump shaft. If there is not a slip fit, expand the coupling half by heating it to a maximum temperature of 300ºF (149ºC). Do not force the coupling half! Forcing may damage the bearings or the pump internal surfaces or parts. On CL-2000 through CL14000 series pumps, make certain that pump to coupling hub face dimension is as specified in figure 15. On 904 ® and P2620 pump models, make certain that pump to coupling hub face dimension is as specified in figure 16. 1. 2. 3. 4.
Foundation Bolt Base Grout Concrete Foundation
5. 6. 7. 8.
Washer Bolt Sleeve [3 in. (76 mm) long] Plate Shims
NOTE: Dimensions are in inches with dimensions in millimeters in parentheses.
Figure 12. Foundation Bolt Installation and Grouting.
In most cases, units are shipped with the pump and driver mounted on the base and coupling assembly parts shipped separately. (Refer to Paragraph 1b.) The pump and driver have been checked on level pads or (when supplied) on the customer's base at the factory to ensure that field alignment can be made, provided that the base is field mounted on a level foundation. However, as indicated in Paragraph 1 d, they are NOT in alignment. Motor shims are packed separately and shipped with a pump that is base mounted to receive the drive motor. A flexible coupling will accept some degree of misalignment such as that caused by temperature change or other variations for a short period of time. However, a coupling must be in alignment for continuous operation in all cases.
1. Pad (Level carefully in both directions.) 2. Grout 3. Concrete Foundation
4. L ev el 5. Pump Mounting Nuts (Welded to Skid) 6. Steel Shim Blocks
NOTE: Level pads with each other; use shims if necessary. Level accurately between skids before grouting; shim with steel blocks each side of all four foundation bolts.
Figure 13. Preparing Foundation Bolt Pads and Installing and Grouting Skids 16
Bulletin 642-J
Even though a coupling may be lubricated, excess misalignment causes wear, vibration, and loads that result in premature bearing failure, seal wear, or ultimate seizing of the pump. Misalignment can be angular, parallel, or a combination of these; in addition, misalignment can be in the horizontal plane, vertical plane, or both. (See Figure 14.) If proper alignment cannot be achieved, recheck the tightness of foundation bolts and the leveling provided by the shimming of the foundation bolts.
CAUTION - Turbine alignment must be performed at operating temperature. Consult the turbine manufacturer's installation and operation manual or his representative for recommendations on alignment procedures and for thermal growth allowances that should be made between shaft centerlines for your turbine and driven equipment.
DRIVERS (MOTORS, GEAR REDUCERS, TURBINES, ETC.) MUST BE FIELD ALIGNED TO THE PUMP PRIOR TO OPERATION, IN ACCORDANCE WITH THE FOLLOWING INSTRUCTIONS. Note - For coupling used on CL-2000 through CL-14000 series pumps, P2620, Vectra, or 904 ® Pumps, make certain that the pump to coupling hub dimension is as specified in Figure 15 or 16. Refer to Figure 17 for coupling arrangements used for multiple pump installations.
CAUTION - To avoid buildup of tolerances on multiple pump installations, align all pump and driver shafts optically. a.
Rough Alignment. Perform a rough alignment, before accomplishing the final alignment, as follows: I. Level the base (by shimming) and securely fasten the base to its permanent foundation at all foundation locations.
1. Machined Surface Extending From Body 2. Coupling Hub Face
2. Roughly align the pump and driver shaft centerlines in the horizontal plane (make them straight enough) so that final alignment adjustments can be made at the driver only. 3. Roughly align the pump and driver shaft centerlines in the vertical plane (make them level enough) so that final alignment adjustments can be made at the driver only. It may be necessary or desirable to shim the feet of the pump in order to achieve adequate elevation.
1. Angular Misalignment
2. Parallel Misalignment
Figure 14. Types of Misalignment
Dimension A - Inches (MM) Pump Size Single Extended Shaft
Double Extended Shaft
CL-2000
21 (533)
21 (533)
CL-3000
23-5/16 (592)
21-5/16 (541)
CL-4000
28-5/16 (719)
27-15/16 (710)
CL-6000
-
27-7/8 (708)
CL-9000
-
29-1/4 (743)
CL-14000
-
33-5/16 (846)
Figure 15. Coupling Assembly Dimension, CL-2000 through CL-14000 Series Pumps NASH Installation Instructions
17
Note - Pumps that are driven by gear reducers and motors not supplied by NASH should be installed so that the centerline of the driven shaft is approximately 1/32 to 1/16 inch (0.8 to 1.6 mm) higher than the centerline of the driver shaft so that final alignment can be accomplished as specified in Paragraph 3.6c or 3.6d.
B REF. 1. TWO 1-1/4-7 UNC THREADED HOLES. 180° APART. ACCESS TO FACE 1.
3.
4. On loose-fit couplings with setscrews, adjust the coupling halves to the coupling gap recommended for your type of coupling with the coupling halves installed. When couplings are supplied by NASH, refer to the Engineering Data Sheet for your order in order to determine the coupling manufacturer's gap recommendation.
2.
A REF.
TOP VIEW
CAUTION - Too much variation in the coupling gap may cause premature coupling and/or bearing failure.
B
5. Check coupling halves to make certain that the coupling fit to the shaft is not too loose. A loose fit (when used) should not have a diametral clearance greater than 0.004 inch (0.10 mm) or excessive stresses can be produced that may cause premature key and keyway failures. A
Note - As a rule of thumb, the gap between the shafts should be no less than the coupling gap. When coupling halves must be overhung in order to achieve the correct coupling gap, it is a good practice to overhang both coupling halves by an equal amount. For CL-2000 through CL-14000 series pumps, P2620, and 904 ® Pumps, make certain the pump to coupling hub dimension specified in Figure 15 or 16 is maintained.
SK-9647
SIDE VIEW
Dimensions - Inches (mm)* Pump Model
A ±1/32 (0,8) 904 L,M
22-1/2 (572)
904 P,R
25-3/8 (645)
904 S,T
29-5/8 (752)
904 U P2620
B ±1/32 (0,8)
6. Securely fasten the pump to the base after rough alignment has been accomplished in both the vertical and horizontal planes and after the proper coupling gap has been achieved.
30-13/16 (783) 18-7/16 (468)
*Single and double extended shafts
7. Make all final piping connection to the pump after the rough alignment has been accomplished and before final alignment is performed.
F igure 16. Coupling Assembly Dimension, P2620 and 904 ® Pump Models b.
Coupling Alignment Shim Kit. A shim kit is supplied by NASH for all pumps that are mounted on a common pump/motor base. The shims have a total thickness of approximately 1/16 inch (1.6 mm) and are used to make the final alignment of the motor to the pump. The shims are laminated, even though they may appear solid. Each lamination is 0.003 inch (0.076 mm). To obtain the
18
Bulletin 642-J
desired thickness, lift the rounded edge of the lamination with a knife at the approximate thickness desired. Once the knife penetrates the shim edge, work the knife through the shim lamination until the laminations separate completely. WARNING - The laminations can be extremely sharp. Wear gloves while peeling shims to avoid minor cuts. Peel individual shim layers to make fine adjustments to the total shim thickness. When inserting thin shim layers under the feet of the motor, sandwich the thin-
Detail A. Rung spacer installation (see note 2.) 1. 2. 3. 4.
ner shim layers between the thicker shim layers and then insert the combined shim total. Sandwiching the shims before inserting them prevents the thin shims from bending over and creating uneven footings. The fact that the edges of the shims are slightly rounded will not affect shim performance. c.
Final Alignment (Preferred Method). Following accomplishment of the rough alignment and preliminary shimming procedures, align the units using a dial indicator, as follows, to accomplish the final alignment.
Detail B. Insulated 100og82 coupling (see note 3.)
T10 Pump Coupling Hub Rung Spacer and Rubber Disc (See Detail A.) Pump Coupling Hub Face Motor Coupling Hub Face
5. Insulation (See Detail B.) 6. 1000G82 Motor Coupling Hub 7. End Cover Ribs (On Sizes 130T and 140T10 Only)
**1/4 inch (3.2 mm) (approx.) coupling hub overhang on pump shaft results when shrunk per NASH installation drawing(s) dimensions. Recommended motor hub installation dimension will also result in 1/4 inch (3.2 mm) (approx.) overhang. NOTES: 1. For specific dimensions, refer to the NASH installation drawing(s) supplied with your unit. 2. Rung spacers are to be installed with clearance as shown at break in grid 180 degrees apart. The remaining spacers are to be evenly spaced apart. The rubber disc, 1/8 inch (3.2 mm) thick, is to be installed between the T10 coupling hubs. 3. Insulation can be installed on 1000G82 motor couplings for synchronous motors when required. 4. Dimensions are in inches with dimensions in millimeters shown in parentheses.
Figure 17. Falk Type T10/1000G82 Couplings Installation NASH Installation Instructions
19
d. CAUTION - Never pry up or lift a unit that is restrained by solid pipe connections or by foundation bolts when shims are to be placed under that unit's mounting feet. Regardless of the elevation that is required, prying up or lifting may damage the unit.
Post-Alignment. Upon completion of the final alignment procedure, perform the following post-alignment procedure: 1. Install the coupling pins, inserts, grids, lubricant, cover, etc., whichever are applicable to the coupling type. 2. Install and securely fasten the coupling guard.
Note - Final alignment should (in most cases) be accomplished by shimming the driving unit (gear reducer, motor, turbine, etc.). In some cases, such as turbine drives, it may be easier to align the driven unit to the driver.
WARNING - Do not attempt to start the equipment without the coupling guard installed and secured. NASH guards, when supplied, are designed to meet osha standards. These coupling guards are expandable type guards. When installing the guard, expand the guard as close to the driving and driven units as physically possible in order to satisfy osha requirements. After the guard is expanded, locate the mounting holes and securely fasten the guard.
1. Place a reference or bench mark on the outside diameter of both coupling halves. 2. Separate the coupling halves, if required, and mount a dial indicator as shown in Figure 16 for angular alignment. A small V-block magnetic mount or a strap-type dial indicator mount will provid e the best method of attaching the dial indicator. 3. Slowly rotate both shafts at the same time and determine the value and location of the highest and lowest dial indicator readings. Note - When making dial indicator readings, make certain that the reference marks on both coupling halves are always in alignment. 4. Shim and position the driver unit, repeating step 3, above, until the readings are within (less than) 0.004 inch (0.10 mm) of the total dial indicator reading for a complete revolution of the shafts. 5. With the angular alignment of steps 2 through 4 completed, remount the dial indicator for parallel alignment as shown in Figure 18 and repeat steps 3 and 4.
A. For Parallel Alignment
6. With steps I through 5 completed, securely tighten the unit to the base and recheck the angular and parallel alignments in accordance until the requirements of step 4 are satisfied for both angular and parallel alignment. 7. Recheck the coupling gaps for the coupling halves to make certain that they are within the recommended value. On loose-fit couplings with setscrews, reposition the coupling halves, if necessary, to bring them within limits. 8. Securely tighten the setscrews for the coupling halves, if setscrews are installed. B. For Angular Alignment
Note - Loose-fit couplings must have setscrews; interference-fit couplings may or may not have setscrews. 20
1. Dial Indicator 2. Reference Mark
Figure 18. Checking Alignment with Dial Indicator Bulletin 642-J
3. During operation of the pump, check the unit for excessive noise and vibration. Either or both of these conditions may result from improper alignment.
3.7 V-Belt Drive Alignment CAUTION - V-Belt sheaves should not be forced on the pump shaft. If the bushing is hard to slide on the shaft. Wedge a screwdriver into the saw cut to overcome the tightness, do not force the sheave! Forcing may damage the bearings or the pump internal parts or surfaces. Pumps mounted on bases with motor and sliding bases have sufficient range of adjustment to allow for V-belt drive installation and take-up as specified in the following procedures. For a V-belt drive, whenever it is necessary to position the motor relative to the pump shaft, allow for belt tightening according to Table 2 (Conventional Drive) or Table 3 (Ultra V Drive). The dimensions listed in Table 2 under the headings A, B, C, etc. and the dimensions listed under the headings 3V, 5V, and 8V in Table 3 are the minimum distances below the standard center distance to which the belts should be installed. The dimensions li sted under the heading of Minimum Take-Up Allowance are the minimum distances that should be allowed to tighten the belts. V-belts should be factory or field matched in required sets for best results. If matched belts are not available, use belts with the same or adjacent code numbers. Belt lengths and a code number are stamped on each belt at the factory. The code number indicates a variation in belt length: code 50 indicates no variation in belt length; numbers above or below 50 indicate variations of belt length. V-belts are coded in consecutive numbers as follows: Under 120 inches (3048 mm), by variations of 1/16 inch (1.6 mm) with two-digit code steps (46-48-50-52-54, etc.) for each 1/16-inch (1.6 -mm) variation; 120 inches (3048 mm) and over (and all 8V's) by 1/8-inch (3.2-mm) variations with four-digit code steps (42-46-50-54-58, etc.). Thus, for example, a B belt marked 90" Code 48 would have an actual length of 89-15/16 inches (2284 mm); an A belt or an 8V belt marked 130" Code 54 would have an actual length of 130-1/8 inches (3305 mm).
moving of the centers closer together by the amount shown in Table 2 or 3 to permit installation of the belts without damage. Make allowance for center adjustment by the amount shown in the Minimum Take-Up Allowance column of the applicable table. This adjustment is required to compensate for manufacturing tolerance and for possible stretch and wear of the belts after initial run-in and during operation. d. Measure the span length of the installed belt (dimension A in Figure 21). e. Using a spring scale, apply a perpendicular force to any ONE of the belts at the center of span A. The force should be large enough to deflect the belt 1/64 inch (0.4 mm) for every inch (25.4 mm) of span length. For example, the deflection of a 30-inch (762-mm) span is 30 x 1/64 or 0.469 inch (11.9 mm). f. Compare the deflection force applied in step e with the values in Table 4. Initially tighten the belt to the value shown for the run-in period. The ideal tension is the least tension at which the belts will not slip under peak load conditions. WARNING - Always enclose v-belt drives with a guard before starting the driver. g. Check the tension frequently during the first 24 to 48 hours to check for the value established in steps e and f. If the value changes, readjust the belt tension. At the end of 48 hours, stop the driver and check the tension again. Compare this tension with the value shown in Table 4 for normal running. Ad just the belt tension, if necessary. CAUTION - Over tensioning shortens belt and bearing life.
Install the V-belt in accordance with the following instructions: a. Mount the belt(s) in the grooves without forcing. b. Align the belt drive by the four-point method, using a straightedge. The two sheaves are aligned when the two points (near and far) on the face of each of the sheaves touch the straightedge as shown in Figure 19. c. Determine installation and take-up allowance dimensions by referring to Tables 2 and 3 and thereby establish center distance and standard belt length dimensions. (See Figure 20.) Make provision for the
1. Driver Sheave 2. Driven Sheave 3. Straightedge
Figure 19. Four-Point V-Belt Alignment Method
NASH Installation Instructions
21
Minimum Installation Allowances - Inches † Standard Belt Length - lnches †
Minimum TakeUp Allowance Inches †
Belt Sections A
B
C
D
All Sections
26 to 38 * (660 to 965)*
3/4 (19)
1 (25)
-
-
1 (25)
to 60 (965 to 1524)
3/4 (19)
1 (25)
1-1/2 (38)
-
1-1/2 (38)
60 to 90 (1524 to 2286)
3/4 (19)
1-1/4 (32)
1-1/2 (38)
-
2(51)
0 to 120 (2286 to 3048)
1 (25)
1-1/4 (32)
1-1/2 (38)
-
2-1/2(64)
120 to 158 (3048 to 4013)
1 (25)
1-1/4 (32)
1-1/2 (38)
2 (51)
3 (76)
158 to 195 (4013 to 4953)
-
1-1/4 (32)
2 (51)
2 (51)
3-1/2 (89)
95 to 240 (4953 to 6096)
-
1-1/2 (38)
2 (51)
2 (51)
4 (102)
240 to 270 (6096 to 6858)
-
-
2 (51)
2-1/2 (64)
4-1/2 (114)
0 to 330 (6858 to 8382)
-
-
2 (51)
2-1/2 (64)
5 ( 27)
330 to 420 (8382 to 10668)
-
-
2 (51)
2-1/2 (64)
6(152)
420 and over (10668 and over)
-
-
-
3 (76)
1.5% of Belt Length
*In each group the range is to, but not including, the second length. † Dimension in millimeters shown in parentheses.
Table 2. Conventional Belt Drive Installation Dimensions
Minimum Take-Up Allowance Inches †
Minimum Installation Allowances - Inches † Standard Belt Length Inches †
Belt Sections 3V
5V
8V
All Sections
25 to 50*(635 to 1270)*
1/2 (13)
-
-
1 (25)
50 to 80 (1270 to 2032)
3/4 (19)
1 (25)
-
1-1/4 (32)
80 to 112 (2032 to 2845)
3/4 (19)
1 (25)
1-1/2 (38)
1-1/2(38)
112 to 140 (2845 to 3556)
3/4 (19)
1 (25)
1-1/2 (38)
1 3/4(44)
140 to 180 (3556 to 4572)
-
1 (25)
1-1/2 (38)
2-/4 (57)
180 to 224 (4572 to 5690)
-
1 (25)
1-3/4(44)
2-1/2(64)
224 to 250 (5690 to 6350)
-
1-1/4 (32)
1-3/4 (44)
2-3/4(70)
250 to 280 (6350 to 7112)
-
1-1/4 (32)
1-3/4 (44)
3-1/4(83)
280 to 315 (7112 to 8001)
-
1-1/4 (32)
1-3/4 (44)
4(102)
315 to 400 (8001 to 10 160)
-
1-1/4 (32)
2 (51)
4-1/2(114)
400 to 500 (10160 to 12700)
-
-
2 (51)
5-1/2(140)
*In each group the range is to, but not including, the second length. † Dimension in millimeters shown in parentheses.
Table 3. Ultra V-Belt Drive Installation Dimensions 22
Bulletin 642-J
h. After piping connections have been completed (Paragraph 3.5), check to be sure that the pump turns freely and that the V-belt drive runs the pump in the correct direction of rotation. Refer to the Operation and Maintenance Bulletin for your pump for initial start-up instructions.
CAUTION - The pump must be primed and the seal water supply turned on before starting the pump, even to check direction of rotation. i. Keep the V-belts free of foreign material at all times and inspect the V-belt drive on a regular basis.
A. Span Length B. Deflection - 1/64 in. per inch (0.4 mm per 25.4 mm) of Span C. Force
A. Allowance for V-Belt Installation B. Allowance for V-Belt Take-Up C. Center Distance
Figure 20. V-Belt Center-Distance Determination
Figure 21. Checking V-Belt Tension
Belt Section
*Small DiameterRange
**Deflection Force for Run-In Period (Startup)
**Deflection Force for Normal Running Tension
3V
2.65 to 3.65 (67.31 to 92.71)
6 (2.7)
3 to 4-1 /2 (1.4 to 2. 0)
3V
4.12 to 6.00 (104.6 to 152.4)
8 (3.6)
4 to 6 (1.8 to 2.7)
5V
7.10 to 10. 90 (180.3 to 276.9)
16 (7.3)
8 to 12 (3.6 to 5.4)
5V
11.80 to 16.00 (299.7 to 406.4)
20 (9.1)
10 to 15 (4.5 to 6.8)
8V
12.50 to 17.00 (317.5 to 431.8)
36 (16.3)
18 to 27 (8.2 to 12.2)
8v
18.00 to 22.40 (457.2 to 569.0)
40 (18.1)
20 to 30 (9.1 to 13.6)
A
3.0 to 3.6 (76.2 to 91.4)
4-1/8 (l.9)
2-3/4 (l.2)
A
3.8 to 4.8 (96.5 to 121.9)
5 (2.3)
3-1/4 (l.5)
A
5.0 to 7.0 (127 to 177.8)
6 (2.7)
4 (l.8)
B
3.4 to 4.2 (86.4 to 106.7)
5-1/4 (2.4)
3-1/2 (l.6)
B
4.4 to 5.6 (111.8 to 142.2)
7-1/8 (3.2)
4-3/4 (2.2)
B
5. 8 to 8.6 (147.3 to 218.4)
9 (4.1)
6 (2.7)
C
7.0 to 9.0 (117.8 to 228.6)
13-1/2 (6.1)
9 (4.1)
C
9.5 to 16.0 (241.3 to 406.4)
17-1/2 (7.9)
11-3/4 (5.3)
D
12.0 to 16.0 (304.8 to 406.4)
28-1/2 (12.9)
19 (8.6)
D
18.0 to 27.0 (457.2 to 685.8)
36 (16.3)
24 (10.9)
*Dimensions are in inches with millimeters shown in parentheses. **Deflection forces are shown in pounds with kilograms in parentheses.
Table 4. V-Belt Tension NASH Installation Instructions
23
Other NASH Products 2BV
Compact liquid ring vacuum pumps built for serious cost savings Use up to 50 percent less water than other liquid ring pumps Monoblock and pedestal designs available Capacity of 4 to 350 CFM with vacuum to 29+” HgV
Vectra
Liquid ring vacuum pumps and compressors Available in feature rich budget designs (XL or GL) Designed to handle high back pressure requirements Capacity of 115 to 2,860 CFM with vacuum to 29” HgV
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Large liquid ring vacuum pumps with superior corrosion resistance Top discharge capability which eliminates need for trench Self-recirculating seal water, reducing need for external seal water source Capacity of 4,000 to 23,000 CFM with vacuum to 29+” HgV
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Integral 2 stage liquid ring pumps with improved performance at vacuum levels down to 0.8" HgA. Designed to handle large amounts of liquid carryover without difficulty Capacity of 100 CFM to 2200 CFM with vacuum to 0.8" HgA
Dry-Pro
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Highly reliable dry-running, explosion-proof vacuum pumps Specifically developed for processes involving sensitive materials Condensation-free, therefore, corrosion-free, producing no waste products Capacity of 50 to 1,350 CFM with vacuum to below 0.1 Torr
Pumps-M-642-J 052005 ©2005 All Rights Reserved
Gardner Denver Liquid Ring Pump Division 9 Trefoil Drive Trumbull, CT 06611 phone: +1 800 553 NASH fax: +1 203 459 3988 email:
[email protected] GardnerDenverNash.com
