Gas ejectorfor single-stage liquid ring vacuum pumps

GEV 25 . . . GEV 1800

VACUUM TECHNOLOGY GPV G 2133.73102.55.01 E 05/99

Operating pressure: 8 to 80 mbarSuction volume flow: 5 to 1050 m³/h

CONSTRUCTION TYPE

Sterling SIHI gas ejectors are simple and sturdy vacuumgas ejectors with following particular characteristics:

Adaptable to different operating conditions by adequatematerial selection

Simple installation into the suction line of liquid ringvacuum pumps

Low noise service which is free of maintenance anddeficient in vibration

APPLICATION

Sterling SIHI gas ejectors extend the operating range ofSterling SIHI liquid ring vacuum pumps so that lowerabsolute pressures become possible (to 8 mbar).

Field of application are e.g.:

Chemistry and pharmacy for distilling and degassing

Electric industry for impregnation and drying

Plastics industry for degassing etc.

The gases which are to be handled may be vapoursaturated or aggressive. Sterling SIHI gas ejectors areused wherever the vacuum attainable by a liquid ringvacuum pump is not sufficient and where danger of runningin cavitation is immenent for the liquid ring vacuum pump.Even if the suction side of the ejector is closed, the liquidring vacuum pump is protected against cavitation.

GEV 150 + LEM 150

NOTE

The characteristics of the suction volume flow of the gasejectors depend on essentially on the suction capacity ofthe liquid ring vacuum pump and therefore on the vapourpressure ant temperature of the service liquid used.To meet with the different conditions, we offer 2construction series.

Type: A B

Service liquid: water to 15°C water to 30°C

Suction pressure: 8 . . . 40 mbar 20 . . . 80 mbar

POLLUTION CONTROLL: To reduce the exhaust blast themotive gas can be removed from the separator.

The standard combinations described in this catalogue listare optimal in view of suction volume flow, powerabsorption and service charges. Other combinations of gasejectors and liquid ring vacuum pumps can beapplied. Details on request.

Gas ejectorsfor two-stage liquid ring vacuum pumps

GOV 3211, GOV 3212GPV 4011 . . . GPV 6312

VACUUM TECHNOLOGY GPV G 1133.73101.52.01 E 07/00

Operating pressure: 4 to 80 mbarSuction volume flow: 10 to 400 m³/h

CONSTRUCTION TYPE

Sterling SIHI gas ejectors are simple and sturdy vacuumgas ejectors with following particular characteristics:

• Adaptable to different operating conditions byadequate material selection

• Simple installation into the suction line of liquid ring

vacuum pumps • Low noise service which is free of maintenance and

deficient in vibration

APPLICATION

Sterling SIHI gas ejectors extend the operating range ofliquid ring vacuum pumps so that lower absolute pressuresbecome possible (to 8 mbar).

Fields of application are e.g.:

Chemistry and pharmacy for distilling and degassing

Electric industry for impregnation and drying

Plastics industry for degassing etc.

The gases to be handled may be vapour saturated oraggressive. Sterling SIHI gas ejectors are used whereverthe vacuum attainable by a liquid ring vacuum pump is notsufficient and where danger of running in cavitation isimmenent for the liquid ring vacuum pump. Even if thesuction side of the ejector is closed, the liquid ring vacuumpump is protected against cavitation.

NOTE

The characteristics of the suction volume flow of the gasejectors depend on essentially on the suction capacity ofthe liquid ring vacuum pump and therefore on the vapourpressure ant temperature of the service liquid used.To meet with the different conditions, we offer 2 construc-tion series.

Service liquid: water up to 15°C water up to 30°C

Suction pressure: 8 ... 40 mbar 20 ... 80 mbar

Series: GOV 3211,3212 GOV 3211, 3212GPV 4011 - 6012 GPV 4311 - 6312

In case of particularly low suction the gas ejectorGPV 5112 is available.

Service liquid: water 15°C

Suction pressure: 4 ... 12 mbar

POLLUTION CONTROLL: To reduce the exhaust blast themotive gas can be removed from the separator.

The standard combinations described in this catalogue listare optimal in view of suction volume flow, powerabsorption and service charges. Other combinations of gasejectors and liquid ring vacuum pumps can be applied.Details on request.

2

Material design

MATERIAL DESIGN

Item COMPONENTS 81 88

0951 Casing 0.6025 1.4408

0960 Venturi tube holder 0.6025

0969 * Insert ring - 1.4541

0970 Motive nozzle hard rubber 1.4401

0975 Venturi tube

In case of material design 88 the venturi tube holder is not in contact with the medium handled.

* only in case of material design 88

Sectional drawing

3

Technical Data

Suction pressure range 4 to 12 mbar Service liquid temperature up to 15°C

gas ejector + liquid ring vacuumpump

pump

speed

rated power of themotor of the liquidring vacuum pump

pressure at a suctionvolume flow = zero

make-up water requirementsin m3/h

KBdifference in temperature °C

FB

rpm kW mbar 5 2

GPV 5112 + LPH 55320 1450 11 ca. 2 0,95 1,55 2,7

Suction pressure range 8 to 40 mbar Service liquid temperature to 15°C

gas ejector + liquid ring vacuumpump

pump speed rated power of themotor of the liquid

ring

pressure at a suctionvolume flow = zero

make-up water requirementsin m3/h

vacuum pump KBdifference in temperature °C

FB

rpm kW mbar 5 2

GOV 3211 + LOH 25007 2800 1,5 0,13 0,2 0,34

GOV 3212 + LOH 25309 2900 2,2 5 ... 7 0,2 0,34 0,75

GPV 4011 + LPH 45008 3 0,25 0,45 0,9

GPV 4012 + LPH 45316 5,5 4 ... 5 0,35 0,6 0,95

GPV 5011 + LPH 55312 1450 7,5 5 ... 7 0,75 1,4 2,7

GPV 5012 + LPH 55320 11 0,95 1,55

GPV 6011 + LPH 65320 15 4 ... 5 1,1 1,7 2,6

GPV 6012 + LPH 65327 18,5 1,2 1,8

Suction pressure range 20 to 80 mbar Service liquid temperature to 30°C

gas ejector + liquid ring vacuumpump

pump speed rated power of themotor of the liquid

ring

pressure at a suctionvolume flow = zero

make-up water requirementsin m3/h

vacuum pump KBdifference in temperature °C

FB

rpm kW mbar 10 5

GOV 3211 + LOH 25007 2800 1,5 17 0,08 0,13 0,34

GOV 3212 + LOH 25309 2900 2,2 0,11 0,19 0,75

GPV 4311 + LPH 45008 3 0,15 0,25 0,85

GPV 4312 + LPH 45311 4 13 0,2 0,3

GPV 4313 + LPH 45316 5,5 0,25 0,4 0,95

GPV 5311 + LPH 55312 1450 7,5 9 0,45 0,75

GPV 5312 + LPH 55316 11 12 0,5 0,85 2,7

GPV 5313 + LPH 55320 11 9 0,6 0,95

GPV 6311 + LPH 65320 15 8 0,7 1,1 2,6

GPV 6312 + LPH 65327 18,5 0,8 1,2

FB = make-up liquid serviceKB = combined liquid service, service liquid 10°C, 5°C or 2°C warmer than the make-up water

The make-up water flows refer to the lowest suction pressure indicated. In case of increasing suction pressure these figuresdecrease.

The values indicated suction volume flow are valid for compression of dry air of 20°C from suction pressure to atmosphericpressure (1013 mbar). Service liquid for the liquid ring vacuum pump also indicated is water to a temperature of 15°C resp.30°C. The motive air for the gas ejector has a pressure of abt. 1013 mbar.

Motive and handling gases with physical characteristics which deviate from those of air, service water with other temperaturesthan those indicated, as well as other service liquids than water cause a change in suction capacity, which can be determinedby Sterling SIHI on request.

4

Performance graph of the combinations

Suction pressure range: 4 to 12 mbar for service liquid temperatures to 15°C

10

1000

1 100

suction pressure

suct

ion

vo

lum

e fl

ow

6 20 40 2004

GPV 5112 + LPH 553201

8

1 speed: 1450 rpm

10002

100

200

400

600

mbar

m³/h

Suction pressure range: 8 to 40 mbar for service liquid temperatures to 15°C

1

10

100

1000

1 10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

4 20 200 400

2

4

20

40

200

400

m³/h

GOV 3211 + LOH 250071

GOV 3212 + LOH 253091

GPV 4011 + LPH 450082

GPV 4012 + LPH 453162

GPV 5011 + LPH 55312 2

GPV 5012 + LPH 553202

GPV 6011 +LPH 653202

GPV 6012 + LPH 653272

1speed: 2900 rpm2speed: 1450 rpm

40 808 mbar

For the suction volume flow the tolerance is 10 %.

5

Performance graph of the combinations

Suction pressure range: 20 to 80 mbar for service liquid temperatures up to 30°C

1

10

100

1000

10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

GOV 3212 + LOH 253091

GPV 5312 + LPH 553162

GPV 5311 + LPH 55312 2

GPV 5313 + LPH 553202

GPV 6311 + LPH 653202

GPV 6312 + LPH 653272

1speed: 2900 rpm2speed: 1450 rpm

20 200 40040 8060

2

4

20

40

200

400

GPV 5311 + LPH 55312 2

GPV 4313 + LPH 453162

GPV 4312 + LPH 453112

GOV 3211 + LOH 250071

mbar

m³/h

For the suction volume flow the tolerance is 10 %.

6

Dimension table

N1 = gas-inlet, N2 = gas-outlet, TG = motive gas inlet

series + N1 / N2 TG b e w weight in kg for material designsize 81 88

GOV 3211 DN 32 * G ¼ 36 22 230 3,5 4GOV 3212GPV 4011 G ½ 45 38 413 11,5 13GPV 4012 G ¾ 50 55 555 16 20GPV 4311 DN 40 315 11 12GPV 4312 G ½ 45 38 413 11,5 13GPV 4313GPV 5011 G 1 55 55 653 20 25GPV 5012 DN 32 * 54 70 714 23 30GPV 5112 DN 50GPV 5311GPV 5312 G 1 55 55 653 20 25GPV 5313GPV 6011 47GPV 6012 DN 65 DN 25 ** 70 85 790 35GPV 6311 48GPV 6312

* Flange suitable for counterflange as per DIN 2558 ** Flange suitable for counterflange as per DIN 2561

Flange connections as per DIN 2501 PN 10 DIN 2558 PN 6 DIN 2561 PN 10

DN 40 50 65 32 25

k 110 125 145 90 85

D 150 165 185 - -

d2 x number 18 x 4 18 x 4 18 x 4 14 x 2 14 x 2

d4 88 102 122 - 68

s 16 18 18 - -

Example for ordering:

G P V • 4312 81 0series size material design case sealing

On delivery the point (•) in the fourth place of the type code is replaced by a letter in the factory.

Any changes in the interest of the technical development are reserved.

Sterling SIHI GmbHLindenstraße 170, D-25524 Itzehoe, Germany, Telephone +49 (0) 48 21 7 71 - 01, Fax +49 (0) 48 21 7 71 274

2

Material design

GEV 25 and GEV 50 GEV 90...GEV 150GEV 250...GEV 425GEV 350...GEV 450

Item COMPONENTS 0S 4F 0R 0B 4B 0A 4B

0970 Motive nozzle 1.4571 hard rubber 1.4571 2.0401 1.4571

0975 Venturi tube 2.0401 1.4571

0951 Casing EP-resin glass-fibre reinforced 0.6025 1.4408 0.6025 1.4408

0960 Venturi tube holder not available 0.6025 0.6025

0969 Insert ring not available 1.4571 not available 1.4571

GEV 600...GEV 1800 GEV 91...GEV 161

Item COMPONENTS 0A 4B Item COMPONENTS 0A 4B

0970 Motive nozzle 2.0401 1.4571 17.40 Motive nozzle 2.0401 1.45710975 Venturi tube 17.50 Venturi tube

0951 Casing 0.6025 1.4408 10.60 Casing 0.6025 1.4408

0960 Venturi tube holder 1.0038

In case of the material design 4B the venturi tube holder is not in contact with the medium handled.

Sectional drawing

GEV 25 + GEV 50 GEV 91 . . . GEV 161 GEV 90 . . . GEV 1800

3

Technical Data

Suction pressure range 8 to 40 mbar type A service liquid temperature up to 15°CSuction pressure range 20 to 80 mbar type B service liquid temperature up to 30°C

gas ejector +liquid ring-vacuum pump

pump-speed

rated power of themotor of the liquidring vacuum pump

pressure at a suction volume flow = zero

mbar mbar

make-up water flow fordiffernce in temperature

m³/hrpm kW type A type B 2°C 5°C

GEV 25 + LEM 25 2800 0,75 8 -* 0,11 0,06

GEV 50 + LEM 50 1,5 0,19 0,11

GEV 91 + LEM/L 91 AZ/AB 2900 2,2 10...12 0,35 0,22

GEV 126 + LEM/L 126 AZ/AB 3 5...6 8...9 0,4 0,26

GEV 161 + LEM/L 161 AZ/AB 1460 4 5...7 0,65 0,39

GEV 90 + LEM/L 90 2,2 5...7 0,4 0,21

GEV 125 + LEM/L 125 3 12 0,47 0,26

GEV 150 + LEM/L 150 4 4...6 0,49 0,28

GEV 250 + LEM/L 250 1450 5,5 8 0,6 0,34

GEV 325 + LEM 325 7,5 0,91 0,55

GEV 425 + LEM 425 11 12 1,22 0,78

GEV 350 + LEH 350 7,5 4...5 1,0 0,53

GEV 450 + LEH 450 11 1,25 0,71

GEV 600 + LEH 600 15 8...9 1,7 1,0

GEV 800 + LEH 800 1460 18,5 7 2,0 1,2

GEV 900 + LEH 900 22 2,4 1,5

GEV 1200 + LEH 1200 30 8 4,3 2,7

GEV 1500 + LEH 1500 975 37 3...4 4 4,75 3,1

GEV 1800 + LEH 1800 45 10 5,0 3,3

• The gas ejectors GEV 25 and GEV 50 only are available as type A. At a service water temperature of 30°C and suctionvolume flow zero a pressure of 17 mbar is reached.

The make-up liquid flow ist indicated for combined operation. The service liquid is 2 °C resp. 5 °C warmer than the make-upwater. Data for make-up water operation, see operation instructions for liquid ring vacuum pumps.

The values indicated for the suction volume flow are applicable for the compression of dry air of 20 °C from suction pressureto atmospheric pressure (1013 mbar). As service liquid for the liquid ring vacuum pump is used water of 15 °C resp. 30 °C.The motive air for the gas ejector has a pressure of abt.. 1013 mbar.

Motive and pumping gases with physical properties differing from those of air, service water with temperatures different fromthose indicated, as well as service liquids other than water, cause a change of the suction capacity which can be determinedby Sterling SIHI on request.

4

Performance graph of the combinations

Suction pressure range: 8 to 40 mbar for service liquid temperatures up to15°C

1

10

100

1000

1 10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

2 4 20 200 400 mbar

2

4

20

40

200

400

m³/h

GEV 25A+LEM 251

GEV 50A+LEM 501

GEV 90A+LEM / L 912

GEV 125A+LEM/L 1252

GEV 150A+LEM/L 1502

GEV 250A+LEM/L 250 2

GEV 325A+LEM 3252

GEV 425A+LEM 4252

1speed: 2800 rpm2speed: 1450 rpm

40 80606 8

10

100

1 10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

2 6 20 40 200 mbar

m³/h

4

GEV 91A+LEM 911

GEV 126A+LEM 1261

GEV 161A+LEM 1612

4008

20

40

60

80

1 speed: 2900 rpm2 speed: 1460 rpm

60 80

If a combination gas ejector - liquid ring vacuum pump is applied in the range from 40 mbar to 1013 mbar, the motive gasflow can be shut off. Then the suction volume flow of the combination increases by abt. 15 %.For the suction volume flow the tolerance is 10 %.

5

Performance graph of the combinations

Suction pressure range: 8 to 40 mbar for service liquid temperatures up to15°C

100

500

900

1 10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

m³/h

mbar

GEV 350A+ LEH 3501

GEV 450A+LEH 4501

GEV 600A+LEH 6002

GEV 800A+LEH 8002

GEV 900A+LEH 9002

GEV 1200A+LEH 12003

GEV 1500A+LEH 15003

GEV 1800A+LEH 18003

1speed: 1450 rpm2speed: 1460 rpm3speed: 975 rpm

2 4 6 8 20 40 80 200 400

300

700

1100

60

If a combination gas ejector - liquid ring vacuum pump is applied in the range from 40 mbar to 1013 mbar, the motive gasflow can be shut off. Then the suction volume flow of the combination increases by abt. 15 %.

For the suction volume flow the tolerance is 10 %.

6

Performance graph of the combinations

Suction pressure range: 20 to 80 mbar for service liquid temperatures up to30°C

1

10

100

1000

10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

GEV 25B+LEM 251

GEV 50B+LEM 501

GEV 90B+LEM / L 912

GEV 125B+LEM/L 1252

GEV 150B+LEM/L 1502

GEV 250B+LEM / L 2502

GEV 325A+LEM 3252

GEV 425B+LEM 4252

1speed: 2800 rpm2speed: 1450 rpm

20 200 400 mbar40 8060

2

4

20

40

200

400

10

100

10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

GEV 91B+LEM 911

GEV 126B+LEM 1261

GEV 161B+LEM 1612

1 speed: 2900 rpm2 speed: 1460 rpm

20 40 200 mbar40060 80

20

40

60

80

If a combination gas ejector - liquid ring vacuum pump is applied in the range from 80 mbar to 1013 mbar , the motive gasflow can be shut off. Then the suction volume flow of the combination increases by abt. 15 %.For the suction volume flow the tolerance is 10 %.

7

Performance graph of the combinations

Suction pressure range: 20 to 80 mbar for service liquid temperatures up to30°C

100

1000

10 100 1000

suction pressure

suct

ion

vo

lum

e fl

ow

GEV 350B+ LEH 3501

GEV 450B+LEH 4501

GEV 600B+LEH 6002

GEV 800B+LEH 8002

GEV 900B+LEH 9002

GEV 1200B+LEH 12003

GEV 1500B+LEH 15003

GEV 1800B+LEH 18003

1speed: 1450 rpm2speed: 1460 rpm3speed: 975 rpm

mbar20 40 200 40060 80

200

300

400

600

500

m³/h

700

800

If a combination gas ejector - liquid ring vacuum pump is applied in the range from 80 mbar to 1013 mbar , the motive gasflow can be shut off. Then the suction volume flow of the combination increases by abt. 15 %.

For the suction volume flow the tolerance is 10 %.

8

Dimension tableGEV 25 + GEV 50GEV 91 to GEV 161 GEV 90 to GEV 450 GEV 600 to GEV 1800 Flange connections

N1 = gas-inlet, N2 = gas-outlet, TG = motive gas inlet

series + type weight in kg for material design size N1 N2 b d e w SW 0R 0 0B 0 4B 0 0A 0 0S 0 4F 0

GEV 25 A G 1 G 1 25 G 1/8 34 223 46 - 1,1GEV 50 AGEV 91 A, B G 1 1/4 G 1 1/4 291 55 3,8 3,6GEV 126 A, B 33,5 G 1/4 45 338 - 4,2 3,9GEV 161 A, B G 1 1/2 G 1 1/2 422 66 5,0 4,7GEV 90 A, B 284 7,5 8,5

GEV 125 A 329 8 9B 40 40 70 25 284 7,5 8,5 -

GEV 150 A 354 8 9B 329

GEV 250 A, B 50 414 13 12,5

GEV 325 A G 1/2 597 28B 543 27

GEV 425 A 684 30,5 29,5B 50 65 50 50 597 28 -

GEV 350 A,B 522 25

GEV 450 A 663 29 28B 576 26,5

GEV 600 A, B 846 -GEV 800 A, B 65 100 70 25* 85 42 40GEV 900 A, B 866GEV 1200 A, B 1057 77 78

GEV 1500 A 1250 92 94B 100 125 90 50** 100 1057 76 77

GEV 1800 A 1291 91 93B 1250 92 94

* Flange suitable for counter-flange as per DIN 2561 ** Flange suitable for counter-flange as per DIN 2558

flange connections as per DIN 2501 PN 10 DIN 2561 PN 10 DIN 2558 PN 6

DN 40 50 65 100 125 25 50k 110 125 145 180 210 85 110D 150 165 185 220 250 - -

d2 x number 18 x 4 18 x 4 18 x 4 18 x 8 18 x 8 14 x 2 14 x 2d4 88 102 122 158 188 68 -s 16 18 18 19 22 - -

Example for ordering:G E V A 91 A 0A 0series size type material design

Any changes in the interest of the technical development are reserved.

S t e r l i n g S I H I G m b HLindenstraße 170, D-25524 Itzehoe, Germany, Telephone +49 (0) 48 21 / 7 71 - 01, Fax +49 (0) 48 21 / 7 71-274