Operation & Maintenance Manual Model T25 - 1.25 IN CS 1753093
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Table of Contents Data Sheet....................................................................................................................3 Pump Performance Curves..........................................................................................4 General Dimensions Sheet..........................................................................................5 GA Drawing……………………………………………………………………....................6 Cross Section Drawing………………………………………………………….….............7 Parts List…………………………………………………………………………..............…8 Introduction…………………………………………………………………….........…......10 Installation………………………………………………………………………...........…..11 Inlet Pressure Requirements…………………………………………………......….…...12 Lubrication Requirements……………………………………………………........…..….13 Startup Checklist……………………………………………………………….........….....14 Operation……………………………………………………………….…….........…........15 Valve Replacement Procedure……………………………………………......………....16 Packing & Plunger Replacement Procedure……………………….....…………….…..17 Trouble Shooting Guide………………………………………………........…………..…19 Contacts…………………………………………………………….........……………..….22
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Pump and Fluid Systems
Model T25 Triplex Power Pump Specifications Plunger Ratings Pump Model
T25A
T25B
Plunger Size (in./mm)
Displacement (Gal/Rev)
Rated Pressure (psi/MPa)
Minimum
Continuous
Intermittent
2.2 74
6.7 231
10.1 347
Rated Capacity (GPM/BPD)
1.000 25
0.0241
5,060 34.9
1.250 32
0.0376
3,240 22.3
3.4 116
10.5 361
15.8 542
1.500 38
0.0542
2,250 15.5
4.9 167
15.2 520
22.8 781
1.750 44
0.0738
1,650 11.4
6.6 228
20.7 708
31.0 1,063
2.000 51
0.0964
1,270 9.0
8.7 297
27.0 925
40.5 1,388
2.250 57
0.1220
1,000 7.0
11.0 376
34.0 1,171
51.0 1,756
2.500 64
0.1506
810 5.6
14.0 465
42.0 1,446
63.0 2,168
2.750 70
0.1822
670 4.6
16.0 562
51.0 1,749
76.5 2,448
Continuous Duty
Intermittent Duty
Stroke length (in./mm)
2.36 60
Rated power (HP)
23
34
Rated rod load (lb/kg)
3,975 1,803
Maximum speed (RPM)
280
420
Weight (lb/kg)
615 289
Oil capacity (qt/L)
8.7 8.2
Maximum fluid temperature (°F/°C)
180 82
Mechanical efficiency
90%
Minimum speed (RPM)
weatherford.com
90
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© 2009-2010 Weatherford. All rights reserved.
4976.02
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Pump and Fluid Systems
Model T25 Triplex Power Pump Selection Graph 84
Below minimum RPM
80
Normal operating range
Plunger Rated Fluid Diameter Pressure Cylinder (in.) (psi)
Intermittent operating range
76
2-3/4
670
B
2-1/2
810
B
2-1/4
1,000
B
2
1,270
B
1-3/4
1,650
B
1-1/2
2,250
A
1-1/4
3,240
A
1
5,060
A
72 68 64 60 56
Displacement (gpm)
52 48 44 40 36 32 28 24 20 16 12 8 4 0
0
50
100
250 150 200 Crankshaft Speed (RPM)
300
350
400
2.36-in. stroke, maximum rod load 3,975 lb (1,803 kg)
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© 2009-2010 Weatherford. All rights reserved.
4976.02
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E
Pump and Fluid Systems 12.28 in. [312 mm]
A
Model T25 Triplex Power Pump
F
5.63 in. [143 mm]
General Dimensions
B
NPT 1-1/2 in. cradle drain
26.69 in. [678 mm]
C
Ø2.00 in. [51 mm] D
E
12.28 in. [312 mm]
A F
5.63 in. [143 mm]
B
NPT 1-1/2 in. cradle drain
Flange Connections (in./mm)
Dimensions (in./mm)
Pump Model
Discharge Connection Sizes
Suction Connection Sizes
T25A
1 (25.4) NPT
2 (50.8) NPT
T25B
1-1/2 (38.1) NPT
3 (76.2) NPT
weatherford.com
26.69 in. [678 mm]
5
A
B
C
D
E
F
2.95 75
3.66 93
17.80 452
23.72 602
32.05 814
11.76 299
© 2009-2010 Weatherford. All rights reserved.
4976.02
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6
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PARTS LIST Weatherford T25-1.25IN Pump Part Number 1753093 Revision Level A
Item
Part Number
1
1159485
Plunger, 1.25IN WFT T25 1045 TC coated
Parts Description
Material Torque Ft-Lb Quantity -
-
3
2
1188930
Nut, adjusting 1.25IN WFT T25 AB
-
-
3
3
1188931
Box, stuffing 1.25IN WFT T25 420
-
-
3
4
1188932
Sleeve, guide 1.25IN WFT T25 AB
-
-
6
5
1188934
Ring, packing 1.25IN WFT T25 teflon/kevlar
-
-
15
6
1143800
O-Ring, 55 O.D. X 3.1 C.S. HNBR
-
-
3
7
291217
Seat, suction valve WFT T10 420
-
-
3
8
1120428
O-Ring, 45 O.D. X 3.1 C.S. HNBR
-
-
3
9
1372130
Seat, discharge valve WFT T10 420
-
-
3
10
1141659
O-Ring, 60 O.D. X 3.1 C.S. HNBR
-
-
3
11
1372127
Cover, top valve WFT T10 420
-
-
3
12
1139167
O-Ring, 65 O.D. X 3.1 C.S. HNBR
-
-
3
13
1237269
Spring, discharge valve WFT T10 304
-
-
3
14
1372126
Cage, discharge valve WFT T10 420
-
-
3
15
1237264
Spring, suction valve WFT T40 304
-
-
3
16
1372133
Cage, suction valve WFT T10 420
-
-
3
17
1372129
Disc, valve WFT T10 420
-
-
6
18
291185
Flange, suction 2.00IN NPT WFT T10 1045
-
-
2
19
1115796
Bolt, hex M10 X 45 1045
-
16
14
20
1139167
O-Ring, 65 O.D. X 3.1 C.S. HNBR
-
-
3
21
1119268
Flange, discharge 1.00IN NPTWFT T10 1045
-
-
2
22
907951
O-Ring, 35 O.D. X 3.1 C.S. HNBR
-
-
14
23
1160889
Capscrew, inner hex M14 X 45 4135
-
-
4
24
1271816
Stud, M16 X 80 4135
-
-
6
25
899348
Nut, hex M16 304
-
110
14
26
910558
Washer, flat M16 304
-
-
8
27
910560
Washer, lock M16 304
-
-
12
28
1188907
Retainer, top valve cover WFT T40 1045
-
-
3
29
1794432
Cylinder, fluid B T25 WFT 4140
-
-
1
-
8
30
910574
Stud, M16 X 175 4135
-
31
1116864
Plug, drain 0.125IN NPT WFT T25 1045
-
-
3
100
291901
Retainer, intermediate rod seal WFT T25 HT250
-
-
3
101
958450
O-Ring, 90 O.D. X 3.1 C.S. HNBR
-
-
3
102
742631
Dipstick, oil level WFT T25
-
-
1
103
958447
Seal, oil PD40 X 65 X 12 HNBR
-
-
2
104
899353
Cap, breather WFT T5
-
-
1
105
291932
Plate, crosshead cover WFT T25 1045
-
-
1
106
291933
Gasket, crosshead cover plate WFT T25 CP
-
-
1
107
955855
Bolt, hex M8 X 16 1045
-
10
40
108
1334383
Washer, flat M8 1045
-
-
40
109
278034
Crosshead, WFT T25 QT400-18
-
-
3
110
291908
Pin, wrist WFT T25 1045 CC
-
-
3
111
291909
Rod, connecting WFT T25 ZG310-570
-
-
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Weatherford International 515 Post Oak Blvd. Houston, TX 77027
1/31/2011, Page 1 of 2
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Item
Part Number
112
291914
Bolt, connecting rod WFT T25 4135
Parts Description
Material Torque Ft-Lb Quantity -
-
113
1188910
Frame, power WFT T25 HT250
-
-
1
114
291915
Plate, rear cover WFT T25 1045
-
-
1
115
291917
Gasket, rear cover plate WFT T25 CP
-
-
1
116
908091
Bolt, hex M6 X 16 1045
-
5
2
117
1379415
Washer, flat M6 100HV
-
5
2
118
1294026
Plug, 0.75IN NPT WFT T25 1045
-
-
1
119
795492
Cover, crankshaft WFT T25 HT250
-
-
1
120
795483
Retainer, crankshaft bearing WFT T25 HT250
-
-
2
121
1141670
Bolt, hex M10 X 30 1045
-
-
12 2
6
122
795486
Bearing, tapered 30312 WFT T25
-
-
123
1188911
Crankshaft, double extended WFT T25 42CrMo
-
-
1
124
291912
-
-
3
125
1188913
Bearing, insert WFT T25 tin alloy Key, 0.375IN X 0.50IN X 3.75IN 1045
-
-
1
126
1293846
Seal, oil PD60 X 80 X 12 HNBR
-
-
2
127
958511
5
6
1162143
Capscrew, inner hex M6 X 10 WFT T25 4135 Ring, snap M35 65Mn
-
128
-
-
6
129
291907
Bushing, wrist pin WFT T25 QSn6-6-3
-
-
3
130
291900
Rod, intermediate WFT T25 1045 CC
-
-
3
131
291858
Plate, cradle cover WFT T25 304
-
-
1
-
2
-
8
132
1188914
Shim, crankshaft retainer WFT T25 CP
-
133
908040
Washer, flat M10 1045
-
Item
Part Number
1
291217
Spare Kit Description
Material Torque Ft-Lb Quantity
Seat, suction valve WFT T10 420
-
-
3
1372130
Seat, discharge valve WFT T10 420
-
-
3
3
1237264
Spring, suction valve WFT T40 304
-
-
3
4
1237269
Spring, discharge valve WFT T10 304
-
-
3
5
1372129
Disc, valve WFT T10 420
-
-
6
6
1188934
Ring, packing 1.25IN WFT T25 teflon/kevlar
-
-
15
2
7
1159485
Plunger 1 Plunger, 1.25IN 25IN WFT T25 1045 TC coated
-
-
3
8
1293846
Seal, oil PD60 X 80 X 12 HNBR
-
-
2
9
958447
Seal, oil PD40 X 65 X 12 HNBR
-
-
2
10
291912
Bearing, insert WFT T25 tin alloy
-
-
3
11
1120428
O-Ring, 45 O.D. X 3.1 C.S. HNBR
-
-
3
12
1141659
O-Ring, 60 O.D. X 3.1 C.S. HNBR
-
-
3
13
1139167
O-Ring, 65 O.D. X 3.1 C.S. HNBR
-
-
3
14
907951
O-Ring, 35 O.D. X 3.1 C.S. HNBR
-
-
14
15
958450
O-Ring, 90 O.D. X 3.1 C.S. HNBR
-
-
3
16
1143800
O-Ring, 55 O.D. X 3.1 C.S. HNBR
-
-
3
Item
Part Number
1
1211036
Tool, packing assembly 1.25IN WFT T25 1045
-
-
2
1211038
Tool, packing disassembly 1.25IN WFT T25 1045
-
-
1
3
1187148
Tool, vlave seet WFT T10 1045
-
-
1
Tool Kit Description
Material Torque Ft-Lb Quantity 1
4
1187149
Tool, spacer block WFT T1045
-
-
1
5
895747
Tool, sleeve WFT T5 1045
-
-
1
6
1283390
Tool, hex nut WFT T5 1045
-
-
1
7
1283390
Bolt, M10 X 60 1045
-
-
1
8
1187159
Tool, adjusting nut wrench WFT T10 1045
-
-
1
Weatherford International 515 Post Oak Blvd. Houston, TX 77027
1/31/2011, Page 2 of 2
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Introduction This manual is intended to guide users in the setup, operation, and maintenance of the Weatherford equipment covered herein. While comprehensive in scope, the manual is written for operators and mechanics that are already familiar with the unique characteristics of reciprocating pumps. If you do not fit in this category, or are unsure in any way how to setup, operate, or maintain the pump, Weatherford strongly recommends you consult Weatherford or one of our authorized distributors for assistance before attempting to install, operate, or maintain this equipment. Always use safe and sound mechanical practices and safety precautions when operating or maintaining a Weatherford reciprocating pump. Weatherford pumps are positive displacement pumps that can develop extremely high pressures. Never operate the pump without a properly sized and set relief valve or other pressure relieving device installed directly on the discharge port of the pump. The manual and its contents are written based on typical pump configurations, however there may be differences in your particular pump based on your requirements of your application. For this reason, manuals are generic to a general pump model, however in all cases the specific construction details of your pump are always shown the Parts List, a separate document that is supplied with the pump at the time of shipment. The Parts List contains a General Arrangement Drawing, Cross Section Drawing, and Bill of Material for your exact pump based on the part number. The Bill of material contains Weatherford part numbers, required quantities, and List Prices for ordering replacement components as well as a list of the assembly torque required for all critical fasteners. Refer to the pump Data Sheet for specific performance parameters of the pump that include maximum operating pressures and speeds. Contact Weatherford or the distributor that sold the pump for a copy of the specific pump Data Sheet for the model in question if you do not have one available. Weatherford reserves the right to discontinue models or update the information contained in this manual and associated Parts Lists at any time without notice.
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Installation Weatherford pumps may be installed in either indoor or outdoor applications. If the pump is installed outdoors it is generally recommended that it be provided with a cover to protect it from the elements, however it is not required. Note that outdoor installations, particularly those in extremely wet, humid, or otherwise difficult locations may require maintenance cycles to be performed on a more frequent basis. The pump should be installed on a rigid base and located on a flat, horizontal surface. If the pump base is not level, the level of oil in the crankcase will not be maintained at correct position. Moving parts could be starved of oil, or in other cases a high level of oil may damage the oil seals. If the pump base is not installed on a flat surface, or properly shimmed, this condition may put excessive stress on the pump components and lead to premature failures. Weatherford pumps may be driven using belt-sheave systems or directly coupled to the driver though a gearbox. When operating with belt-sheave systems, it is always desirable to mount the pump sheave as far inboard on the shaft as possible to minimize the moment arm and associated overhung loads that must be supported by the shaft and bearings. Weatherford recommends a minimum of 3 feet be allocated on all four sides, and above the top of the pump to insure adequate clearance for monitoring, adjustment, and maintenance of the pump. The pump crankshaft is designed so that the top of the shaft moves forward, toward the front or fluid cylinder end, of the pump during operation. This direction of rotation allows for the optimal distribution of oil to the crosshead and wrist pin areas of the pump as well as quieter, smoother general operation. This is very important to the service life of the pump. If unsure, the proper direction of rotation is shown graphically on the General Arrangement drawing provide in the Parts List of the pump.
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Inlet Pressure Requirements Insufficient inlet pressure to the pump is one of the most common problems observed in the field. With most common liquids, optimal performance is obtained with an inlet pressure of 20 PSI, however most pumps will perform properly with a flooded suction provided the inlet piping system is properly designed. Some fluids with high vapor pressures or high viscosities may require different inlet conditions for proper operation, so consult Weatherford before designing the system for recommendations. Operation of the pump with insufficient inlet pressure can result in cavitation of the liquid as it enters the pumping chamber between the suction and discharge valve assemblies. In it’s most mild form, cavitation may only cause the pump to knock slightly and or vibrate more than normal. In other cases, it can cause premature damage to valves, plungers, packing or occasional air locking. In severe cases, cracking of the fluid cylinder or failure of the power end can occur, so it’s very important to insure the pump receives adequate inlet pressure. The maximum inlet pressure is 50 PSI unless specifically approved by Weatherford. In general, the inlet piping system should be as large, short, and direct as possible. The Hydraulic Institute publishes a very comprehensive list of guidelines for the design and implementation of a good pump inlet and discharge systems. Weatherford recommends these guidelines be followed whenever possible.
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Lubrication Requirements Weatherford pumps are shipped without oil in the crankcase and must be filled prior to startup. Suitable oils for normal operation are high quality, SAE 80W-90 non-detergent gear oils. Oils that include rust and oxidation inhibitors, such as Texaco Regal R&O are preferred. The T25 pump has a nominal oil capacity of 9 quarts. A sight glass is provided on the power frame, the proper level of oil is at the center of the gauge when not running. Oil should also be visible in at least 25% of the gauge when in operation. If an oil level dipstick is provided at the back of the powerframe instead of a sight glass, the actual oil level should be filled between the upper and lower marks on the dipstick when the pump is not running. The oil should be drained and flushed after the first 250 hours of operation. After the initial change, the oil should be changed every 1,500 hours of operation or 4 months of service, whichever comes first. If the oil becomes contaminated or dirty, it should be changed immediately even if the recommended service interval has not been reached. Once in service, the oil temperature should be monitored periodically. The normal operating temperature depends on the pressure, speed, and ambient temperature, but is normally not above 150°F. The oil temperature should never exceed 175°F. If it does, shut down immediately to prevent serious damage the pump power end. Unless your T25 has been supplied with an optional packing lubrication system, no other lubrication or greasing is required. Lubrication of the packing is typically not required; however it can dramatically extend the life of the packing and plungers in many applications and is one option that is often well worth the added expense over the life of the equipment. Consult Weatherford or your pump provider for details about the proper operation of the optional packing lubrication system if applicable.
13
Startup Checklist Following is a simple checklist to review before starting the pump. Due to the wide range of possible systems configurations and operation requirements, it is not intended to be comprehensive or cover all possible issues: 1. 2. 3. 4.
5. 6. 7. 8.
Oil is clean and at the proper level Shaft and cradle cover guards are in place A relief valve is installed at the pump discharge and properly setup A pressure gauge or transducer is installed at the pump discharge, and all personnel have been advised not to exceed the maximum operating pressure of the pump Insure stuffing box adjusting nuts are secure but not over tight All personnel are clear of moving parts and the discharge piping system is prepared to receive fluid under pressure Inlet valves are open to the pump, and booster pumps are turned on (if applicable) Pump input shaft is rotating in the proper direction
Note, if at all possible, allow the pump to start, reach operating speed and circulate the oil, before any discharge pressure is applied. Starting the pump under load, puts extra strain on the pump and cause a great deal of wear. A by-pass valve is often used in this situation to allow fluid to bypass back to the suction tank until during this startup procedure. Starting the pump under load also puts an extra strain on drive components and increases the starting torque required. Once the pump has been running, insure that the power end oil has not overheated. The maximum oil temperature in most services is about 150°F, and it should never be allowed to exceed 175°F.
14
Operation Once the pump is in operation, the only adjustment normally required is to the packing. On standard pumps with manually adjustable packing, packing leakage should be monitored periodically and adjusted as necessary to maintain a leakage rate of between 5-30 drips per minute from each cylinder. It is especially important to check the leakage rate and adjust the packing on the initial startup, and each time the packing is replaced. Packing will require frequent adjustment until it “seats” after 24-48 hours of operation under pressure. Spring loaded packing is non-adjustable and does not require any maintenance to compensate for wear. Once the leakage rate exceeds 60 drops per minute, it is usually necessary to replace the packing and/or plungers. On manually adjustable stuffing boxes, packing is adjusted by turning the adjusting nut clockwise to tighten the packing and reduce the leakage rate, or turning counter clockwise to loosen the packing and allow the packing to run cooler, although usually accompanied by an increased rate of packing leakage. In all cases, turn the adjusting nut no more than 1/8 of a turn at each adjustment interval. Allow 10 minutes between adjustments to allow the packing to seat and new leakage rate to stabilize. Take care not to over-tighten the packing when adjusting. After adjustment, check to make sure the outside of the stuffing box is not getting hot, which can be a sign that the packing is too tight and generating excessive heat. At some point during the end of the usable life of the packing, it will not be possible to reduce leakage rate even with additional turns on the adjusting nut, and at this point it is time to replace the packing and/or plungers. Note that operation of the pump with improperly adjusted packing can result in premature failures of both the plungers and packing.
15
Valve Replacement Procedure Valve assemblies in the T25 pumps are accessed and removed through the top cover of the fluid end. Follow the steps below to remove the valve assemblies when required. Valve assembly components are normal expendable items on the pump and require replacement periodically as a result of wear. Disc Valves 1. Remove the top cover heavy hex nuts (25), lock washers, and flat washers that hold the top cover clamp (28) in place. 2. Remove the top cover cap (11), then remove the discharge valve spring (13), discharge valve cage (14), and discharge valve disc (17). 3. The discharge valve seat (9) can now be removed by pulling the seat up and out of the fluid cylinder counterbore. This may take some force due to interference from the o-ring (10) and any corrosion that might have formed during operation. The ID of the valve seat it threaded, and the valve seat pulling tool may be inserted into the threads to assist in removal of the seat if necessary. The valve seat removal tool is supplied with the pump assembly. 4. Repeat steps 1-3 for the suction valve cage (16), suction valve spring (15), suction valve disc (17), and suction valve seat (17). 5. Normal wear items are the suction valve disc and seat. These items should be replaced if any signs of wear are evident. Weatherford also suggests replacing valve springs and valve seat o-rings whenever valve service is performed, even if they do not appear damaged, to insure maximum operational time between service intervals. 6. When replacing valve components, be sure to fully install the valve seats into the fluid cylinder counterbore. Torque top cover heavy hex nuts as shown on Parts List.
16
Packing & Plunger Replacement Procedure Packing and/or plungers require periodic replacement as a result of normal operational wear. Packing and/or plunger replacement is required when the packing leakage rate exceeds an acceptable limit. If your pump is equipped with manually adjustable packing, first attempt to adjust the packing to see if the leakage rate can be reduced before changing out packing. Follow the steps listed below to replace packing or plungers in Weatherford T25 pumps. Illustrations represent typical packing arrangements; however the construction details of your specific pump may vary slightly. Refer to your Parts List for specific construction details on your pump. Manually Adjustable Square Braid Packing 1. Square braid packing can be changed on the pump with the fluid cylinder still in place; however the most common method of servicing the packing and plungers requires removal of the fluid cylinder. 2. Remove the fluid cylinder from the pump to expose the front of the stuffing box. 3. Remove the stuffing box (3) and stuffing box o-ring (6) from the pump power frame by pulling forward. It may be necessary to tap on the back of the adjusting nut (2) with a soft mallet to free the stuffing box from the frame. Note that the packing (5), follower and guide sleeves (4), and adjusting nut (2) should come out as an assembly when the stuffing box is removed. 4. Remove the plunger (1) from the crosshead extension rod using the hex flat provided on the back of the plunger.
17
5. Packing should be replaced as required. If the plunger OD shows grooves, pits, or other damage, then it should also be replaced. New packing will not last long if installed on old, damaged plungers. 6. When replacing packing, tighten the adjusting nut firmly, but not too tight. Carefully monitor the leakage rate and stuffing box temperature after startup to insure the packing has been properly adjusted. It may take 4-8 hours of operation under pressure before the new packing is effectively seated. 7. Replace the fluid cylinder and torque fluid cylinder nuts as shown in the Parts List. Manually Adjustable Chevron Packing (N/A) Spring Loaded Packing (N/A)
18
Trouble-Shooting Guide One of the most important parts of maintaining a pump is to establish a regular maintenance program. Programs will vary for each application due to the duty cycle, fluid, and pump selection. Weatherford pumps are designed to minimize maintenance requirements and provide extended operational life between service intervals. All pumps will eventually require maintenance, and the following guide is intended to assist the operator in determining the likely cause of a variety of potential problems. Weatherford experts are also available to assist you in diagnosing a problem and getting you back in operation as soon as possible. 1. No flow from pump Tank is empty Inlet valve is closed Inlet strainer is clogged with debris Crankshaft is not turning 2. Insufficient pressure from pump ONLY Pump speed is too slow Relief valve improperly adjusted and bypassing fluid Oversize or worn nozzle on equipment Worn pump valves Excessive leakage from pump seals 3. Insufficient flow from pump ONLY Pump speed is too slow Relief valve improperly adjusted and bypassing fluid Worn pump valves Excessive leakage from pump seals 4. Insufficient flow OR pressure AND rough operation Valve Problem: Pump valve stuck in open or closed position Valve assembly is damaged or unseated Valve seat is washed out All pump cylinders not primed Inlet strainer is clogged with debris Excessive gas in liquid due to: Air leaks in suction line or fittings High spots in suction line that allow formation of gas pockets Vortex in tank near inlet pipe opening
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Pump is cavitating due to: Insufficient NPSHa (tank head or charge pressure) Fluid viscosity is too high Inlet line is too long and/or too small diameter 5. Pump runs rough, knocks, or vibrates ONLY Valve assembly is damaged or has unseated Pump is cavitating due to: Insufficient NPSHa (tank head or charge pressure) Inlet line is too long and/or too small diameter Worn or damaged power frame components Pump is sucking air across worn seals on inlet stroke 6. Suction pressure fluctuates rapidly Pump is cavitating Fluid leaking from pump Packing is wearing and about to fail Fluid cylinder bolts are not properly tightened Fluid cylinder o-rings (or gaskets) are damaged 7. Short packing seal life High abrasive particle content in fluid Wrong style or type of packing for service Plunger is damaged Pump is cavitating (cylinders may run hot) Poor quality water used Pump is allowed to run dry for extended periods of time 8. Short valve life High abrasive particle content in fluid Valve assemblies only partially rebuilt during previous service Valve assemblies damaged do to improper installation techniques Poor quality water used Pump is cavitating 9. Cracked fluid cylinder Discharge pressure too high Pump exposed to freezing conditions without properly draining Hydraulic shock resulting from cavitation or entrained air Discharge valve is stuck shut Material or manufacturing defect 10. Crankshaft jerks or starts and stops rotation V-belts are loose and slipping (if equipped) Hydraulic system relief valve is chattering (if equipped): Attempting to operate pump at excessively high discharge pressure Discharge line is blocked or partially obstructed
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11. Power end overheats (in excess of 175° F) Discharge pressure too high Low oil level Improper oil viscosity Contaminated power end oil Pump speed is too fast Pump is running backwards Couplings are misaligned V-belt drive tension is too tight Pump located too close to heat source Worn or damaged power frame bearings 12. Broken crankshaft or connecting rod Pump exposed to freezing conditions without proper draining Discharge pressure too high Suction pressure too high Hydraulic shock due to cavitation Material or manufacturing defect 13. Broken Fluid End Bolts Bolt or nut not properly torqued Discharge pressure too high Excessive piping loads on fluid end 14. Power end oil is contaminated Pump has been operated with failed packing for extended periods of time Use of high-pressure wash wand to clean near breather or oil seal areas Deflector shields are missing or damaged Crosshead extension oil seals are damaged or improperly installed
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Weatherford International 515 Post Oak Blvd. Houston, Texas USA 77027 Phone: 713-693-4000 E-Mail:
[email protected] www.weatherford.com
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