GRASSO Screw Comp_Product Information

Grasso

Refrigeration Division

SCREW COMPRESSORS Series SH, MC and LT Product Information

2004/4

_040000_pi_sc__gbr_.doc

 Copyright Grasso GmbH Refrigeration Technology The contents of this documentation and the enclosed drawings, sketches and diagrams are intended only for plant users and operating personnel. They may be neither duplicated nor divulged to third parties or firms without written consent. The technical data, figures, dimensions and weights presented in the documentation may be more closely defined or otherwise specified as a result of contractual agreement and are binding only after our confirmation in writing. The stipulations set forth in the contract have precedence over those in this documentation. We reserve all rights to introduce technical modifications in the course of further development.

PRODUCT INFORMATION

Grasso SCREW COMPRESSORS DIRECTORY

Refrigeration Division

Introduction

040 015gbr

Philosophy of Series

040 040gbr

Product name

040 200gbr

Compressor Design Citeria

040 300gbr

Limits of Application

040 310gbr

Main Dimensions

Series SH

Types C, D

040 400gbr

Main Dimensions

Series SH

Types E, G

040 410gbr

Main Dimensions

Series MC

Types H, L, M, N

040 420gbr

Main Dimensions

Series LT

Types P, R, S, V, W, Y, Z, XA, XB, XC, XD

040 430gbr

Main Dimensions

Series LT

Types XE, XF

040 440gbr

Conditions for Refrigerant Connections

040 500gbr

Conditions for Lubricating Oil Connections

040 510gbr

Electric Connections

040 520gbr

Installation Conditions, Sound, Vibration

040 600gbr

Coupling Requirements

040 610gbr

Starting Conditions

040 620gbr

Operational Monitoring

040 630gbr

Lubricationg Oils

040 721gbr

Hints for Selection of Refrigeration Oil

040 730gbr

P+I — Diagrams

040 800gbr

Series SH

Series MC

Series LT

03.2004/2

Series SH, MC Overall Concept

AISH02-1gbr

Description of Design

AISH03-1gbr

Schematic Diagram, Connections

AISH04-1gbr

Overall Concept

AIMC02gbr

Description of Design

AIMC03gbr

Connections, Oil Passage

AIMC04gbr

Overall Concept

AI_LT_02gbr

Description of Design

AI_LT_03gbr

Connections

Types P, R, S, T, V, W, Y

AI_PY_04gbr

Connections

Types Z, XA, XB, XC, XD, XE, XF

AI_Z_XF_04gbr

040 010gbr - 1/1

INTRODUCTION

Grasso Refrigeration Division

SCOPE OF APPLICATION The screw compressors are oil injected dual rotor positive displacement machines. The machines are available as standard refrigeration compressors for single-stage operation, as boosters as well as heat pump compressors. The compressors can be applied in cold storage houses, in food industry (slaughter houses, breweries, dairies, food- and vegetable processing), air conditioning, chemical and petrochemical industries, refrigerating, cooling and air conditioning plants onboard ships as well as heat pump operation. The refrigerants NH3, R22, R134a, R404A, R507 and refrigerant mixtures can be used up to a discharge pressure of 362.5 psia (28 bar abs.). For these refrigerants, lubricating oil is chosen in accordance with data sheet 040 700e. The compressors are directly driven by the electric motor through a flexible coupling and are designed for speeds of 50Hz and 60Hz. Supply range The whole supply range of screw compressors comprises 19 types subdivided into the following 3 series: Series SH, SemiPacks, including 4 types (C, D, E, G) with a theoretical swept volume ranging from 231 to 372 m³/h. Series MC, Compact-Screw compressors, including 4 types (H, L, M and N) with a theoretical swept volume ranging from 471 to 860 m³/h. Series LT, High Performance-Screw compressors, including 11 types (P, R, S, V, W, Y, Z, XΑ, XB, XC, XD) with a theoretical swept volume ranging from 805 to 5800 m³/h. The 3 series differ from each other in the degree of integrated functional components of the oil and refrigerant circuits.

SCREW COMPRESSORS

Series LT - High Performance Screw compressors require external filters and valves as well as a separate oil feed system (exception: types W, Z, XA, XB, XC and XD with attached solenoid valves). All compressors feature stepless capacity control and can be provided with self-adjusting, variable volume ratios (parallel slides, system PS with series SH and MC; tandem slides, system TS with series LT). Compressors with built-in Vifixed volume ratios 2.6 to 4.8 ie: 5.5 are available. The value Vi is calculated for the specific operation condition in the compressor selection program COMSEL. All types are fitted with an economiser connection as well as connections for refrigerant injection (liquid injection) and for returning oil from the plant system. Compressors with high pressure ratios are equipped with a self-adjusting system for vibrationfree partial load operation. Before delivery, each compressor is subjected to a test run with nitrogen in the pressure range of the future application which is proven by a works test certificate accompanying each compressor. On request, a certificate of acknowledged classification societies, e.g. TÜV, Lloyds Register of Shipping, Germanischer Lloyd, Norske Veritas, Bureau Veritas, will be provided. A comprehensive quality assurance system based on DIN ISO 9001 and comprising all stages from design/ development, manufacturing, assembly and testing through to customer service guarantees excellent quality of the Grasso Screw compressors. The compressors are delivered without oil. All connections are closed, and the compressors are filled with dry nitrogen (0.2 psig.). Each compressor comes complete with a user’s manual with instructions on operation, installation, maintenance and repair and showing the set of tools and spare parts required.

The SemiPacks of the series SH are equipped with a check valve on the suction and the discharge sides, respectively, a suction filter, an oil filter, an overflow valve, an internal oil management system, a flanged oil pump, a coupling and coupling casing with a centring flange for flange-mounting motors as well as attached solenoid valves for capacity control and Vi adjustment. Variations of this are therefore possible. The finished design will be specified on the ordering list. The components of series MC - Compact-Screw compressors - include an internal oil system, a flanged oil pump, a check valve on the suction side, suction filter and attached solenoid valves for capacity control and Vi adjustment.

03.2002/1

040 015e - 1/2

INTRODUCTION Grasso Refrigeration Division

SCREW COMPRESSORS

TECHNICAL FEATURES Rotors The rotors are made of forged tool steel. They are designed according to low energy consumption criteria (patented profile with optimised main dimensions). The primary rotor is driven by the motor, whereas the secondary rotor is directly driven by the primary rotor by means of a thin oil film.

Shaft sealing The driven main shaft is sealed by means of a ring bearing oil seal with a rotating ring and a fixed ring (impregnated carbon/ steel). The seal is designed to relieve load variations whilst containing the oil charge and the thin oil film between the rings results in a long service life.

Casings The casings are made of laminated grey cast iron and can be applied with discharge pressures up to 406.1 psia (28 bar abs.).

Capacity control Stepless adjustment of the hydraulic mechanism enables both the suction volumetric capacity to be changed within the full load range of the compressor from 100% to minimum capacity. Compressors with a variable volume ratio operate according to a system of combined Vi partial-load control.

Storing The compressors of the series SH and MC are completely equipped with rolling bearings. Capacity improving cylindrical-roller bearings for radial load and ball bearings of angle-contact design for axial load ensure a nominal service life up to 100.000 operating hours. A hydraulically loaded balance piston reduces axial loads and increases the designed service life of the thrust bearings. In compressors of the series LT, lowwear friction bearings carry the radial loads of the rotor shafts on a thin oil film without contact, whereas the angle-contact ball bearings take the axial load.

040 015e - 2/2

Position indication For positioning the hydraulic systems of the capacity control and the Vi adjustment, a hermetic path sensor is used which provides an output signal between 4 and 20mA.

03.2002/1

PHILOSOPHY OF SERIES SCREW COMPRESSORS

Grasso Refrigeration Division

Type

swept volume in m³/h

C

231

D

265

E

Series SH

321

G

SemiPacks

372 471

H

Series MC

544

L

690

M

Compact Screws

860

N

805

P

Series LT

1040

R

1290

S

High Performance 1640

V

1940

W

2296

Y Z

2748

a XA

3250

XB b

4150

g XC

4900

XD d

5800 0

1000

2000

3000

4000

5000

6000

swept volume in m³/h (at 50 Hz)

03.2002/1

040 040e - 1/2

PHILOSOPHY OF SERIES SCREW COMPRESSORS

Grasso Geschäftsbereich Kältetechnik

SH - SEMIPACKS • extremly high degree of component integration, • exclusively antifrictional bearings, • Vi- , partload control (PS - system). type

swept volume in m³/h (50 Hz)

swept volume in CFM (60 Hz)

C

231

164

D

265

188

E

321

228

G

372

264

MC - COMPACT-SCREW COMPRESSORS • high degree of component integration, • exclusively antifrictional bearings, • stepless Vi- , partload control (PS - system). type

swept volume in m³/h (50 Hz)

swept volume in CFM (60 Hz)

H

471

335

L

544

387

M*

690

490

N*

860

611

LT - HIGH PERFORMANCE SCREW COMPRESSORS • long life time for highest performance, • sleeve type for radial and ball type for thrust bearings, • stepless Vi- and partload control (TS - system). Typ

swept volume in m³/h (50 Hz)

swept volume in CFM (60 Hz)

P

805

572

R

1040

739

S

1290

917

V

1640

1165

W

1940

1378

Y

2296

1632

Z

2748

1953

XA

3250

2309

XB

4150

2949

XC

4900

3482

XD

5800

4122

040 040e - 2/2

03.2002/1

PRODUCT NAME

Grasso SCREW COMPRESSORS

Refrigeration Division

Name

X

-

9

(Z)

Screw Compressor Type Screw Compressor Vi Version Coupling Type (only for screw compressor types C, D, E, G) X

Screw Compressor Type

Series

Code letter

Theoretical swept volume at 2940 rpm in m³/h*)

Series

Code letter

Theoretical swept volume at 2940 rpm in m³/h*)

SH

C D E G

231 265 321 372

LT

MC

H L M N

471 544 690 860

P R S V W Y Z XA XB

805 1040 1290 1640 1940 2296 2748 3250 4150 4800 5800

XC *)

9

50Hz power system; for a 60Hz system, multiply the values by 1.2.

XD

Screw Compressor Vi Version

key number 1

Standard refrigeration compressor

Vi = 2.6

2

Standard refrigeration compressor

Vi = 3.6

3

Standard refrigeration compressor

Vi = 4.8

4

Standard refrigeration compressor

Vi = 5.5

5

Standard refrigeration compressor

Vi = variable

SH series 51

Vi = 2.6/4.8

stepped

52

Vi = 2.6/4.0

stepped

53

Vi = 3.2/4.8

stepped

Vi = 2.6...5.5

stepless

51

Vi = 2.2...4.0

stepless

52

Vi = 2.6...5.5

stepless

MC series 5 LT series

03.2002/1

040 200e - 1/5

PRODUCT NAME Grasso SCREW COMPRESSORS

Refrigeration Division

6

7

Booster application 61

Vi = 2.6

62

Vi = 3.6

Heat pump compressor Vi - fixed 71

Vi = 2.6

72

Vi = 3.6

Vi - variable SH series 751

Vi = 2.6/4.8

stepped

752

Vi = 2.6/4.0

stepped

Vi = 2.6...5.5

stepless

Vi = 2.2...4.0

stepless

MC series 75 LT series 751 8

9

Commercial refrigeration compressor LH series in 2 rating classes 50% and 100% 81

Vi = 2.6

82

Vi = 3.6

83

Vi = 4.8

Speed controlled refrigeration compressor SH series only type G 95

Vi = 2.6...4.8

MC series only type N 95

stepless stepless

Vi = 2.6...5.5

Examples of designation P - 61

Screw compressor 805m³/h (P), Booster with an internal volume ratio Vi=2.6 (61)

C-2(E)

Screw compressor 231m³/h (C), internal volume ratio Vi=3.6 (2), coupling housing with coupling for KN7 225M - 75kW electric motor (E)

040 200e - 2/5

03.2002/1

PRODUCT NAME Grasso SCREW COMPRESSORS

Refrigeration Division

(Z)

Coupling Type (coupling housing with coupling) for screw compressor types C, D, E, G only

Electric flange motor, type IM B 5 *) manufacturer Siemens AG

output in kW 15 18,5 22 30; 37

ABB

160M 1LA5 160L

enclosure

sc type C/D

sc type E/G

IP 54

A

M

B

N

1LA5

180M 1LA6 1LA6

C

P

225M 1LA6

D

R

55

250M 1LA6

E

S

75

280S

F

T

90

280M 1LA6

200L

-

U

-

W/1 Speed controlled

1LA6

110

315S

132

315M 1LA6

150

1PL6186-4HL

1LA6

75, 90

250

SA2

110

250

MA2

280

SMA2

55

M2BA 250 SMA

75

280

90

280

SMA

315

SA

132

315

SMA

15

IP 23

IP 55

SA

110

18,5

P160MG

IP 23

K -

U

E

-

F

T

-

U

G

V

C

P

P160L

30

P180M

37

P180L

55

PLS200LP

H

W

75

P225M

E

S

90

P250S

110

P250M

-

U

132

P280M A

M

15 18,5

03.2002/1

name

45

132

Leroy Somer

coupling type

LS 160M

IP 55

LS 160L

22

LS 180MT

B

N

30

LS 200LT

C

P

37

LS 200L

55

LS 250MP

F

S

75

LS 280 SP/MP

110

LS 315 SP/MP

T -

U

040 200e - 3/5

PRODUCT NAME Grasso SCREW COMPRESSORS

Refrigeration Division

Electric flange motor, type IM B 5 *) manufacturer

output in kW

coupling type name

enclosure

sc type C/D

sc type E/G

IP 23

C

P

H

W

E

S

-

U

B

N

C

P R

AEG

30

KN7 180M

(Schorch)

37

KN7 180L

45

KN7 200M

55

KN7 200L

75

KN7 225M

90

KN7 250S

110

KN7 250M

132

KN7 280M

22

KA7 180M

30

KA7 207L

37

KA7 200L

45

KA7 225M

D

55

KA7 250M

E

S

75

KA7 280S

F

T

-

U

A

M

Frank & Dvorak

90

KA7 280M

110

KA7 315S

132

KA7 315M

15 18,5

VEM

160 L 180 M

B

N

30

200LA

C

P

37

200LB

45

225M

D

R

55

250M

E

S

75

280S

F

T

90

280M A

M

15

K11R 160MX2

IP 55

K11R 160 L2

22

K11R 180 M2

B

N

30

K11R 200 L2

C

P

37

K11R 200 LX2

45

K11R 225 M2

D

R

55

K11R 250 M2

E

S

75

K11R 280 S2

F

T

90

K11R 280 M2

110

K11R 315 S2

-

U

-

S

Z

Z

132 special request

IP 55

22

18,5

WEG

160 MB

IP 54

75

K11R 315 M2 225 S/M

IP 23

*) according to IEC standard 34-7; type IM B 35 (flange motor with mounting feet) may also be used.

040 200e - 4/5

03.2002/1

PRODUCT NAME Grasso SCREW COMPRESSORS

Refrigeration Division

coupling type manufacturer

output in PS

name

USA

40

40HP - 286 TS

(Nema-face)

50

50 HP — 324 TS

60

60 HP — 326 TS

75

75 HP — 364 /5 TS

100

100 HP — 364 /5TS

125

125 HP — 404 /5TS

USA

50

RAM Industries

60

(C-face)

75

enclosure

sc type C/D

sc type E/G

IP 23

D/1

R/1

D/2

R/2

E/ FES

S/ FES

100 125 150

03.2002/1

040 200e - 5/5

COMPRESSOR DESIGN CRITERIA

Grasso SCREW COMPRESSORS

Refrigeration Division

compressor type

theoretical swept vol. m³/h (0)

ZM/ZF

(1)

C

231

5/6

D

265

5/6

E

321

G H L

Vi-adjustment

Vi-Version

compressor equipment

bearing radial/ axial

oil supply

drive motor

(2)

(3)

PS2

1235678

(4)

(5)

(6)

(7)

D

W/W

O

PS2

F

1235678

D

W/W

O

5/6

F

PS2

1235678

D

W/W

O

F

372 471

5/6

PS2

12356789

D

W/W

O

F

5/6

PS0

123567

C

W/W

O

E

544

5/6

PS0

123567

C

W/W

O

E

M

690

5/6

PS0

123567

C

W/W

O

E

N

860

5/6

PS0

1235679

C

W/W

O

E

P

805

5/6

TS0

1234567

A

G/W

M

E

R

1040

5/6

TS0

1234567

A

G/W

M

E E

S

1290

5/6

TS0

1234567

A

G/W

M

V

1640

4/6

TS0

123567

A

G/W

M

E

W

1940

5/6

TS0

1234567

B

G/W

M

E

Y

2296

4/6

TS0

123567

A

G/W

M

E E

Z

2748

5/6

TS0

123567

B

G/W

M

XA

3250

5/6

TS0

123567

B

G/W

M

E

XB

4150

5/6

TS0

1234567

B

G/W

M

E

XC

4900

5/6

TS0

1234567

B

G/W

M

E

XD

5800

5/6

TS0

1234567

B

G/W

M

E

(0)

at 2940rpm (50Hz power system; for a 60Hz power system, multiply values by 1.2

(1)

ZM ZF

numbers of lobes, male rotor numbers of lobes, female rotor

(2)

PS

parallel slide system,

TS

tandem slide system

(3)

1 2 3 4 5 6 7 8 9

Vi = 2.6 Vi = 3.6 Vi = 4.8 Vi = 5.5 Vi = variable booster application heat pump compressor commercial refrigeration compressor speed controlled refrigeration compressor

(4)

A B C D

standard equipment without additional components solenoid valves for capacity and Vi-adjustment on the compressor solenoid valves, suction filter, check valve on the suction side, oil pump on the compressor solenoid valves, suction filter, check valves (suction/ discharge sides), oil pump, overflow valves (suction/ discharge sides) on the compressor

PS0 : stepless Vi-adjustment PS2 : 2-stage Vi- adjustment TS0 : stepless Vi-adjustment

---- : underlined components are optional (operation with external pump is possible) (5)

W G

antifriction bearings sleeve bearings

(6)

O M

compressor operation with flanged oil pump for capacity control compressor operation with external oil pump

(7)

F E

flange motor motor and compressor installed separately

03.2002/1

040 300e - 1/1

LIMITS OF APPLICATION

Grasso SCREW COMPRESSORS

Refrigeration Division

The screw compressors can be operated under the most varied operation conditions within the given limits of application according to the requirements involved. The limits of application listed below for the screw compressors are based on the operational principle of the screw compressor and thermodynamic relations and are the result of practical operating conditions and design.

The tabulated data apply for single, two-stage and heatpump operation. The appropriate compressor model design (1-7) should be selected for the particular operating conditions *) Depending on the specific operating conditions, there might occur reductions of the limits given in the table due to the Compressor Selection Programme COMSEL/GSCREW.

suction temperature compressor inlet

t0h

°C

min

> - 60

discharge pressure (condensing pressure)

p

bar (a)

max

< 28

discharge temperature at compressor outlet

te

°C

max

< 120

pressure ratio (p/p0)

π

-

min

> 1,5

pressure difference (p - p0)

∆p

bar

min

> 0,8

compressor type maximum driving power (kW) maximum nominal torque maximum speed limits compressor type maximum driving power (kW) maximum nominal torque maximum speed limits

50 Hz 60 Hz Nm rpm

C/D 105 126 350 6.000

E/G 150 180 500 6.000

H/L 200 240 640 4.500

M /N 300 360 960 4.500

50 Hz 60 Hz Nm rpm

P 330 400 1060 3.600

R / S/ T 530 640 1700 3.600

V /W/ Y 900 1080 2900 3.600

Z / XA 1250 1500 4020 3.600

XB, XC, XD 1800 2160 5730 3.600

XE, XF 3000 3600 9500 3.600

Instructions: Minimal over-heating on suction side: „wet“ operation to be avoided. The minimum compressor discharge temperature te must be sufficientlyabove the oil temperature for supply to the bearings for compressor with sleeve bearings. Limits for temperature differences will be considered in COMSEL/GSCREW Gas pulsation protection required for π ≥ 8 only. SH and MC series: Minimal speed control in integrated oil pump ≥ 2000 min -1 Rotation direction: view to compressor’s driving shaft: clockwise For ∆ p= p-po ≤ 4 bar is an external oil pump to be taken into consideration For operation conditions with speeds differing from 50 or 60 Hz, the manufacturer should be contacted Comments : 1.

For each individual application all conditions given in the tables should be taken into consideration and adhered to.

2.

Should the given limit values be exceeded in any particular case, the manufacturer must be consulted.

3.

In addition to the application limits given in the tables, consider the operating conditions which must be observed for the corresponding type of the compressor (e.g. start-up regime, oil pressure, oil quantity etc.).

4.

The oil temperature at the compressor inlet must be least 18°C.

5.

Ensure that the oil viscosity will be ≥ 7...70 cSt at n ≥ 2950 min-1 for the oil supply to bearings. Take into account the drop in viscosity due to refrigerant dissolved in the oil!

6.

Economizer operation between the 100% and 85% control slide positions.

07.2003/2

040 310gbr - 1/1

MAIN DIMENSIONS SCREW COMPRESSORS SH SERIES - SEMIPACKS, TYPES C, D

Grasso Refrigeration Division

main coupling housing dimensions with coupling *) l1

(overall length)

A; B

C; G

D

H

K

(mm)

888 [918]

918 [948]

l2

(mm)

351

381

l3 b1 (overall width)

(mm)

h1 (overall height)

(mm)

d1 (locating flange-∅)

(mm)

250

d2 (hole-circle-∅)

(mm)

300

m

(thread size)

n

(number of bolts)

381 [411]

(mm)

411 [441]

544

660

588

510

615

560

300

350

550

450

350

400

600

500

M 20

M 16

352 [362]

313 [324]

492

M 16 4

8

suction side

DN 80

N

discharge side

DN 65

W

supercharging

DN 25

refrigerant injection

DN 8

approx.weight, max. (kg) [...] *)

282 [293]

E; F

292 [303]

300 [310]

320 [330]

for screw compressor Type D see product name Data sheet 040 200E

09/2001 — Rev.2

Screws SH Series

040 400e - 1/2

MAIN DIMENSIONS SCREW COMPRESSORS SH SERIES - SEMIPACKS, TYPES C, D FES DESIGN

Grasso

135

280

D1

257 110

51

350

450

25

285

190

492

H1

D2

Refrigeration Division

Main dimensions

coupling housing with coupling Order No.

L1

(overall length)

Booster

High stage

250165:28D50

250175:28D50

High stage special design 250174:28D50

(mm)

918 [948]

910 [940]

L2

(mm)

381

373

L3

(mm)

381 [411]

383 [413]

B1

(overall width)

(mm)

526

576

H1

(overall height)

(mm)

510

560

D1

(locating flange-∅)

(mm)

266,7

317,5

406,7

D2

(hole-circle-∅)

(mm)

228,6

279,4

355,6

m

(thread size)

(mm)

15,5

17,5

n

(number of bolts)

4

8

suction side

DN80

N

discharge side

DN65

W

supercharging

DN25

refrigerant injection

DN8

approx.weight, max. [...]

(kg)

328 [338]

364 [374]

368 [378]

for screw compressor Type D

040 400 — 2/2

Screws SH Series

09/2001 — Rev.2

MAIN DIMENSIONS SCREW COMPRESSORS SH SERIES - SEMIPACKS, TYPES E, G

Grasso Refrigeration Division

main coupling housing dimensions with coupling *)

M; N

P; V

R

W

S; T

(mm)

975 [1004]

1005 [1034]

l2

(mm)

362

392

l3 b1 (overall width)

(mm)

h1 (overall height)

(mm)

d1 (locating flange-∅)

(mm)

250

300

d2 (hole-circle-∅)

(mm)

300

350

l1

(overall length)

m

(thread size)

n

(number of bolts)

432 [461]

(mm)

462 [491]

620

675

595

615

670

350

450

550

400

500

600

M16

M20

4

8

suction side

DN 100

N

discharge side

DN 65

W

supercharging

DN 25

refrigerant injection

DN

approx.weight, max. (kg)

412 [423]

U

418 [429]

423 [433]

8 442 [452]

438 [448]

461 [472]

[...] for screw compressor Type G *) see product name Data sheet 040 200E

09/2001 — Rev.2

Screws SH Series

040 410e - 1/2

MAIN DIMENSIONS SCREW COMPRESSORS SH SERIES - SEMIPACKS, TYPES E, G FES DESIGN

Grasso Refrigeration Division

main dimensions L1

coupling housing with coupling order no.

(overall length)

Booster

High stage

250166:28G50

250177:28G50

High stage special design 250176:28G50

(mm)

1005 [1034]

997 [1026]

L2

(mm)

392

384

L3

(mm)

395 [424]

397 [426]

B1

(overall width)

(mm)

545

595

H1

(overall height)

(mm)

510

560

D1

(locating flange-∅)

(mm)

266,7

317,5

406,7

D2

(hole-circle-∅)

(mm)

228,6

279,4

355,6

m

(thread size)

(mm)

15,5

17,5

n

(number of bolts)

4

8

suction side

DN100

N

discharge side

DN65

W

supercharging

DN25

refrigerant injection

DN8

approx.weight, max.

(kg)

451 [461]

509 [519]

513 [523]

[...] for screw compressor Type G

040 410E - 2/2

Screws SH Series

09/2001 — Rev.2

MAIN DIMENSIONS SCREW COMPRESSORS MC SERIES, TYPES H, L, M, N

Grasso Refrigeration Division

Type

H

L

M

N

theoretical swept volume in m³/h

471

544

690

860

b1

425

510

b2

350

425

b3

109

138

b4

132

150

dm

18

22

h1

537

646

h2

215

270

h3

36

50

h4

23

26

l1

938

974

1094

1145

l2

350

386

406

457

l3

165

219

l4

245

296

l5

219

260

l6

60

55

l7

75

95

weight

366

381

660

690

nominal sizes

suction side

NB 125

NB 150

of connections

discharge side

NB 80

NB 100

supercharging

NB 32

NB 40

00.09

Screw MC Series

040 420e - 1/1

MAIN DIMENSIONS SCREW COMPRESSORS LT SERIES - TYPES P, R, S, T, V, W, Y, Z, XA, XB, XC, XD

Grasso Refrigeration Division

l4 l

b 1

female rotor

3

male rotor

1

suctio side

connectio superfee

3

discharg side h4 e

4

2

liqui injectio

1

** 5

2

1

type

P

R

S

T

V

W

Y

theoretical swept volume (in m³/h)

805

1040

1290

1460

1640

1940

2296

b1

600

660

750

d1

∅ 26

∅ 26

∅ 26

d2 e1

∅ 60 h6 375

e2

500

566

e3

160

176,3

200

e4

170

195

200

418

∅ 60 h6 485

525

480

∅ 80 h6 535

e5**

250

283

300

h1

525

570

670

h2

290

330

350

h3

50

70

70

h4

110

130

145

l1

817

l2

272

347

l3

95

115

l4

65

45

965

1085

1125

1040

1095

130

105

HR*

HR*

HR*

DN 150

DN 175

DN 250

sizes of

discharge side

DN 100

DN 100

DN 150

connec-

superfeed

DN 32

DN 40

DN 65

tions

liquid injection

DN 15

DN 15

DN 15

598

890

960

130

100

driving shaft

weight: max [kg]

1160

360

suction side

nominal

600

600

1060

1134

1195

1283

* male rotor ** position discharge connection

07.2003/2

Screws LT Series

040 430gbr - 1/2

MAIN DIMENSIONS SCREW COMPRESSORS LT SERIES - TYPES P, R, S, T, V, W, Y, Z, XA, XB, XC, XD

Grasso Refrigeration Division

l4 l

b 1

female rotor

3

male rotor

1

suction side

connection superfeed

3

discharge side

h4 e

4 2

liquid injection

1

** 5

2

1

type

Z

XA

XB

XC

XD

theoretical swept volume in m³/h

2748

3250

4150

4900

5800

b1

760

900 ∅ 26

d1 ∅ 80 h6

d2 e1

630

705

650

∅ 90 717

e2

660

800

e3

220,3

272

e4

230

278

e5**

353

443

h1

700

850

h2

400

495

h3

70

90

h4

140

195

l1

1315

1390

1387

1444

l2

435

462

l3

128

122

85

120

driving shaft

l4

HR*

HR*

nominal

suction side

DN 250

DN 300

sizes of

discharge side

DN 150

DN 200

DN 100

DN 125

DN 15

DN 18

connections superfeed liquid injection weight: max [kg]

1670

1740

2400

2560

800

1527

2650

* male rotor ** position discharge connection

040 430gbr - 2/2

Screws LT Series

07.2003/2

MAIN DIMENSIONS SCREW COMPRESSOR SERIES LT — TYPES XE, XF

Grasso Refrigeration Division

l t1 l t4

Economizer port Liquid injection

MR

Suction side l t3

h t2

Discharge side h t4

h t3

h t1

d t2

FR

b t1 e t3

e t4 e t2 e t5

d t1

type

XE

XF

theoretical swept volume in m³/h

7170

8560

b1

1078

d1

33

d2 e1

905 800

e3

320

e4

255

e5**

430

h1

980

h2

580

h3

95

h4

220 1614

1713

l2

500

l3

124

l4

130

driving shaft

Male rotor

nominal

suction side

DN400

sizes of

discharge side

DN250

connections superfeed

DN150

Oil injection

DN80

liquid injection

DN25

weight: max [kg]

l t2

110 h6 806

e2

l1

**

e t1

Main oil injection

3500

3800

position discharge connection

07.2003/ 0

040_440gbr.doc - 1/1

CONDITIONS FOR REFRIGERANT CONNECTIONS

Grasso SCREW COMPRESSORS

Refrigeration Division

Connection

Filter mesh size [µm]

Remarks

Suction Discharge

Series SH, MC: 100 µm

Economizer port

Series LT : 140 µm

Liquid injection port

During pressure equalisation after stopping of the compressor, care should be taken to prevent foreign matter which are bigger than the mesh size in the suction filter from getting into the compressor together with refrigerant vapour flowing back from the plant components arranged downstream of the compressor. The operating range is between control slide positions of 100% and 85%. At part-load operation, care should be taken to maintain the projected intermediate pressure. Refrigerant injection should only be used in conjunction with inertia-free temperature measurement on the compressor discharge side (k