Technology

Liquid ring vacuum pumps

The technology for humid and wet processes: a ring of operating liquid seals the chambers of the impeller. 207 current models from 4 manufacturers – comparable by pumping speed, ultimate pressure and rated motor power.

Compare 207 modelsHow the technology works

  • 207models
  • 17series
  • 4manufacturers
  • 25 mbarlowest ultimate pressure
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Manufacturers and series

4 manufacturers, 17 series

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Product overview

Compare all 207 models

The filters on the left narrow down the selection by the key figures of the models – for 50 or 60 Hz.

Atlas Copco AWC A series 8 models

AWC 25 APumping speed 25 m³/h 50 Hz31 m³/h 60 HzUltimate pressure 30 mbarRated motor power 0.9 kW 50 Hz1.1 kW 60 HzVariants
AWC 45 APumping speed 45 m³/h 50 Hz58 m³/h 60 HzUltimate pressure 30 mbarRated motor power 1.9 kW 50 Hz2.2 kW 60 HzVariants
AWC 80 APumping speed 80 m³/h 50 Hz99 m³/h 60 HzUltimate pressure 30 mbarRated motor power 3 kW 50 Hz3.7 kW 60 HzVariants
AWC 110 APumping speed 110 m³/h 50 Hz136 m³/h 60 HzUltimate pressure 30 mbarRated motor power 3 kW 50 Hz3.7 kW 60 HzVariants
AWC 140 APumping speed 134 m³/h 50 Hz165 m³/h 60 HzUltimate pressure 30 mbarRated motor power 3.7 kW 50 Hz5.6 kW 60 HzVariants
AWC 190 APumping speed 190 m³/h 50 Hz234 m³/h 60 HzUltimate pressure 30 mbarRated motor power 5.6 kW 50 Hz7.5 kW 60 HzVariants
AWC 280 APumping speed 279 m³/h 50 Hz342 m³/h 60 HzUltimate pressure 30 mbarRated motor power 7.5 kW 50 Hz11 kW 60 HzVariants
AWC 350 APumping speed 350 m³/h 50 Hz432 m³/h 60 HzUltimate pressure 30 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants

Atlas Copco AWC series 9 models

AWC 30Pumping speed 27 m³/h 50 Hz32 m³/h 60 HzUltimate pressure 33 mbarRated motor power 1.1 kW 50 Hz1.5 kW 60 HzVariants 6
AWC 50Pumping speed 52 m³/h 50 Hz62 m³/h 60 HzUltimate pressure 33 mbarRated motor power 1.5 kW 50 Hz2.4 kW 60 HzVariants 6
AWC 80Pumping speed 80 m³/h 50 Hz96 m³/h 60 HzUltimate pressure 33 mbarRated motor power 3 kW 50 Hz4 kW 60 HzVariants 6
AWC 110Pumping speed 110 m³/h 50 Hz130 m³/h 60 HzUltimate pressure 33 mbarRated motor power 3.85 – 4 kW 50 Hz6.3 kW 60 HzVariants 9
AWC 160Pumping speed 165 m³/h 50 Hz185 m³/h 60 HzUltimate pressure 33 mbarRated motor power 4 kW 50 Hz5.5 – 6.3 kW 60 HzVariants 15
AWC 220Pumping speed 230 m³/h 50 Hz265 m³/h 60 HzUltimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.5 – 8.2 kW 60 HzVariants 15
AWC 290Pumping speed 280 m³/h 50 Hz310 m³/h 60 HzUltimate pressure 33 mbarRated motor power 7.5 kW 50 Hz11 – 12.6 kW 60 HzVariants 15
AWC 390Pumping speed 400 m³/h 50 Hz420 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz15 – 16.5 kW 60 HzVariants 15
AWC 500Pumping speed 500 m³/h 50 Hz535 m³/h 60 HzUltimate pressure 33 mbarRated motor power 15 kW 50 Hz18.5 kW 60 HzVariants 15

Atlas Copco AWD A series 8 models

AWD 100 APumping speed 89 m³/h 50 Hz110 m³/h 60 HzUltimate pressure 30 mbarRated motor power 3 kW 50 Hz4 kW 60 HzVariants 2
AWD 140 APumping speed 142 m³/h 50 Hz177 m³/h 60 HzUltimate pressure 30 mbarRated motor power 5 kW 50 Hz6 kW 60 HzVariants 2
AWD 170 APumping speed 176 m³/h 50 Hz219 m³/h 60 HzUltimate pressure 30 mbarRated motor power 6 kW 50 Hz8 kW 60 HzVariants 2
AWD 240 APumping speed 229 m³/h 50 Hz285 m³/h 60 HzUltimate pressure 30 mbarRated motor power 8 kW 50 Hz11 kW 60 HzVariants 2
AWD 350 APumping speed 328 m³/h 50 Hz408 m³/h 60 HzUltimate pressure 30 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants 2
AWD 375 APumping speed 354 m³/h 50 Hz440 m³/h 60 HzUltimate pressure 30 mbarRated motor power 13 kW 50 Hz19 kW 60 HzVariants 2
AWD 600 APumping speed 555 m³/h 50 Hz690 m³/h 60 HzUltimate pressure 30 mbarRated motor power 23 kW 50 Hz30 kW 60 HzVariants 2
AWD 660 APumping speed 656 m³/h 50 Hz816 m³/h 60 HzUltimate pressure 30 mbarRated motor power 26 kW 50 Hz37 kW 60 HzVariants 2

Atlas Copco AWD series 14 models

AWD 110 SPumping speed 106 m³/h 50 Hz128 m³/h 60 HzUltimate pressure 33 mbarRated motor power 3 kW 50 Hz3.7 kW 60 HzVariants 3
AWD 140 SPumping speed 145 m³/h 50 Hz174 m³/h 60 HzUltimate pressure 33 mbarRated motor power 4 kW 50 Hz5.5 kW 60 HzVariants 3
AWD 180 SPumping speed 186 m³/h 50 Hz223 m³/h 60 HzUltimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.5 kW 60 HzVariants 3
AWD 300 SPumping speed 270 m³/h 50 Hz314 m³/h 60 HzUltimate pressure 33 mbarRated motor power 7.5 kW 50 Hz11 kW 60 HzVariants 3
AWD 350 SPumping speed 342 m³/h 50 Hz411 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants 3
AWD 400 SPumping speed 425 m³/h 50 Hz475 m³/h 60 HzUltimate pressure 33 mbarRated motor power 15 kW 50 Hz18.5 kW 60 HzVariants 3
AWD 500 SPumping speed 501 m³/h 50 Hz590 m³/h 60 HzUltimate pressure 33 mbarRated motor power 18.5 kW 50 Hz22 kW 60 HzVariants 3
AWD 600 SPumping speed 616 m³/h 50 Hz739 m³/h 60 HzUltimate pressure 33 mbarRated motor power 20 kW 50 Hz30 kW 60 HzVariants 3
AWD 800 SPumping speed 862 m³/h 50 Hz1,032 m³/h 60 HzUltimate pressure 33 mbarRated motor power 30 kW 50 Hz37 kW 60 HzVariants 3
AWD 1200 SPumping speed 1,252 m³/h 50 Hz1,407 m³/h 60 HzUltimate pressure 33 mbarRated motor power 37 kW 50 Hz45 kW 60 HzVariants 3
AWD 1600 SPumping speed 1,589 m³/h 50 Hz1,717 m³/h 60 HzUltimate pressure 33 mbarRated motor power 45 kW 50 Hz75 kW 60 HzVariants 3
AWD 1960Pumping speed 2,000 m³/h 50 HzUltimate pressure 33 mbarRated motor power 75 kW 50 HzVariants 3
AWD 3280Pumping speed 3,300 m³/h 50 HzUltimate pressure 33 mbarRated motor power 110 kW 50 HzVariants 3
AWD 4510Pumping speed 4,500 m³/h 50 HzUltimate pressure 33 mbarRated motor power 132 kW 50 HzVariants 3

Atlas Copco AWL series 11 models

AWL 4000Pumping speed 4,290 m³/h 50 HzUltimate pressure 160 mbarRated motor power 160 kW 50 HzVariants
AWL 5500Pumping speed 5,580 m³/h 50 HzUltimate pressure 160 mbarRated motor power 185 kW 50 HzVariants
AWL 7000Pumping speed 6,900 m³/h 50 HzUltimate pressure 160 mbarRated motor power 185 kW 50 HzVariants 8
AWL 9500Pumping speed 9,200 m³/h 50 HzUltimate pressure 160 mbarRated motor power 200 kW 50 HzVariants 8
AWL 12500Pumping speed 12,500 m³/h 50 HzUltimate pressure 160 mbarRated motor power 280 kW 50 HzVariants 8
AWL 15000Pumping speed 15,000 m³/h 50 HzUltimate pressure 160 mbarRated motor power 315 kW 50 HzVariants 9
AWL 17500Pumping speed 17,400 m³/h 50 HzUltimate pressure 160 mbarRated motor power 400 kW 50 HzVariants 8
AWL 21500Pumping speed 21,300 m³/h 50 HzUltimate pressure 160 mbarRated motor power 450 kW 50 HzVariants 8
AWL 26000Pumping speed 25,800 m³/h 50 HzUltimate pressure 160 mbarRated motor power 560 kW 50 HzVariants 6
AWL 30000Pumping speed 30,000 m³/h 50 HzUltimate pressure 160 mbarRated motor power 630 kW 50 HzVariants 4
AWL 37500Pumping speed 36,600 m³/h 50 HzUltimate pressure 160 mbarRated motor power 800 kW 50 HzVariants

Atlas Copco AWS series 22 models

AWS 180Pumping speed 168 m³/h 50 Hz202 m³/h 60 HzUltimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.5 kW 60 HzVariants 6
AWS 280Pumping speed 246 m³/h 50 Hz290 m³/h 60 HzUltimate pressure 33 mbarRated motor power 7.5 kW 50 Hz11 kW 60 HzVariants 6
AWS 360Pumping speed 340 m³/h 50 Hz412 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants 6
AWS 450Pumping speed 450 m³/h 50 Hz535 m³/h 60 HzUltimate pressure 33 mbarRated motor power 15 kW 50 Hz22 kW 60 HzVariants 8
AWS 600Pumping speed 600 m³/h 50 Hz700 m³/h 60 HzUltimate pressure 33 mbarRated motor power 18.5 kW 50 Hz30 kW 60 HzVariants 8
AWS 800Pumping speed 750 m³/h 50 Hz888 m³/h 60 HzUltimate pressure 33 mbarRated motor power 22 kW 50 Hz30 kW 60 HzVariants 8
AWS 1100Pumping speed 1,080 m³/h 50 Hz1,320 m³/h 60 HzUltimate pressure 33 mbarRated motor power 37 kW 50 Hz45 kW 60 HzVariants 8
AWS 1300Pumping speed 1,230 m³/h 50 Hz1,452 m³/h 60 HzUltimate pressure 33 mbarRated motor power 37 kW 50 Hz55 kW 60 HzVariants 8
AWS 1600Pumping speed 1,700 m³/h 50 Hz2,000 m³/h 60 HzUltimate pressure 33 mbarRated motor power 45 kW 50 Hz75 kW 60 HzVariants 8
AWS 2500Pumping speed 2,450 m³/h 50 Hz2,780 m³/h 60 HzUltimate pressure 33 mbarRated motor power 75 kW 50 Hz90 kW 60 HzVariants 8
AWS 3300Pumping speed 3,200 m³/h 50 Hz3,840 m³/h 60 HzUltimate pressure 33 mbarRated motor power 75 kW 50 Hz110 kW 60 HzVariants 8
AWS 3800Pumping speed 3,750 m³/h 50 Hz4,520 m³/h 60 HzUltimate pressure 33 mbarRated motor power 90 kW 50 Hz132 kW 60 HzVariants 8
AWS 5500Pumping speed 5,300 m³/h 50 Hz5,850 m³/h 60 HzUltimate pressure 33 mbarRated motor power 160 kW 50 Hz185 kW 60 HzVariants 8
AWS 6500Pumping speed 6,510 m³/h 50 HzUltimate pressure 33 mbarRated motor power 169 kW 50 HzVariants 8
AWS 8000Pumping speed 8,100 m³/h 50 HzUltimate pressure 33 mbarRated motor power 200 kW 50 HzVariants 8
AWS 10000Pumping speed 9,450 m³/h 50 HzUltimate pressure 160 mbarRated motor power 235 kW 50 HzVariants 8
AWS 12000Pumping speed 11,652 m³/h 50 HzUltimate pressure 33 mbarRated motor power 305 kW 50 HzVariants 8
AWS 12500Pumping speed 11,820 m³/h 50 HzUltimate pressure 160 mbarRated motor power 253 kW 50 HzVariants 8
AWS 16000Pumping speed 16,380 m³/h 50 HzUltimate pressure 33 mbarRated motor power 420 kW 50 HzVariants 8
AWS 19000Pumping speed 18,250 m³/h 50 HzUltimate pressure 160 mbarRated motor power 430 kW 50 HzVariants 8
AWS 23000Pumping speed 22,800 m³/h 50 HzUltimate pressure 33 mbarRated motor power 555 kW 50 HzVariants
AWS 26000Pumping speed 26,000 m³/h 50 HzUltimate pressure 160 mbarRated motor power 590 kW 50 HzVariants

Atlas Copco LRP VSD+ series 3 models

LRP 700 VSD+Pumping speed 740 m³/h 50 Hz740 m³/h 60 HzUltimate pressure 25 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants 10
LRP 900 VSD+Pumping speed 940 m³/h 50 Hz940 m³/h 60 HzUltimate pressure 25 mbarRated motor power 26 kW 50 Hz26 kW 60 HzVariants 10
LRP 1000 VSD+Pumping speed 1,050 m³/h 50 Hz1,050 m³/h 60 HzUltimate pressure 25 mbarRated motor power 37 kW 50 Hz37 kW 60 HzVariants 10

Busch DOLPHIN series 70 models

DOLPHIN LX 0030 BPumping speed 25 m³/h 50 Hz31 m³/h 60 HzUltimate pressure 33 mbarRated motor power 1.1 kW 50 Hz1.5 kW 60 HzVariants
DOLPHIN LX 0055 BPumping speed 45 m³/h 50 Hz56 m³/h 60 HzUltimate pressure 33 mbarRated motor power 1.5 kW 50 Hz2.2 kW 60 HzVariants 1
DOLPHIN LA 0053 APumping speed 50 m³/h 50 Hz60 m³/h 60 HzUltimate pressure 130 mbarRated motor power 1.5 kW 50 Hz2.2 kW 60 HzVariants
DOLPHIN LB 0063 APumping speed 60 m³/h 50 Hz65 m³/h 60 HzUltimate pressure 33 mbarRated motor power 3 kW 50 Hz4 kW 60 HzVariants
DOLPHIN LX 0110 CPumping speed 72 m³/h 50 Hz83 m³/h 60 HzUltimate pressure 33 mbarRated motor power 2.2 kW 50 Hz3 kW 60 HzVariants
DOLPHIN LM 0100 APumping speed 82 m³/h 50 Hz97 m³/h 60 HzUltimate pressure 130 mbarRated motor power 2.2 kW 50 Hz3 kW 60 HzVariants
DOLPHIN LA 0103 APumping speed 100 m³/h 50 Hz135 m³/h 60 HzUltimate pressure 130 mbarRated motor power 4 kW 50 Hz4 kW 60 HzVariants
DOLPHIN LX 0140 CPumping speed 100 m³/h 50 Hz120 m³/h 60 HzUltimate pressure 33 mbarRated motor power 3 kW 50 Hz4 kW 60 HzVariants
DOLPHIN LT 0130 APumping speed 105 m³/h 50 Hz128 m³/h 60 HzUltimate pressure 33 mbarRated motor power 3 kW 50 Hz4 kW 60 HzVariants
DOLPHIN LB 0113 APumping speed 110 m³/h 50 Hz120 m³/h 60 HzUltimate pressure 33 mbarRated motor power 4 kW 50 Hz4 kW 60 HzVariants
DOLPHIN LX 0180 CPumping speed 122 m³/h 50 Hz144 m³/h 60 HzUltimate pressure 33 mbarRated motor power 4 kW 50 Hz5.5 kW 60 HzVariants
DOLPHIN LA 0143 APumping speed 140 m³/h 50 Hz190 m³/h 60 HzUltimate pressure 130 mbarRated motor power 4 kW 50 Hz5.5 kW 60 HzVariants
DOLPHIN LB 0144 APumping speed 140 m³/h 50 Hz180 m³/h 60 HzUltimate pressure 33 mbarRated motor power 4 kW 50 Hz5.5 kW 60 HzVariants
DOLPHIN LM 0180 APumping speed 144 m³/h 50 Hz180 m³/h 60 HzUltimate pressure 130 mbarRated motor power 4 kW 50 Hz5.5 kW 60 HzVariants
DOLPHIN LT 0170 APumping speed 144 m³/h 50 Hz162 m³/h 60 HzUltimate pressure 33 mbarRated motor power 4 kW 50 Hz5.5 kW 60 HzVariants
DOLPHIN LB 0184 APumping speed 180 m³/h 50 Hz225 m³/h 60 HzUltimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.5 kW 60 HzVariants
DOLPHIN LX 0260 CPumping speed 200 m³/h 50 Hz239 m³/h 60 HzUltimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.5 kW 60 HzVariants
DOLPHIN LT 0220 APumping speed 203 m³/h 50 Hz230 m³/h 60 HzUltimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.5 kW 60 HzVariants
DOLPHIN LA 0224 APumping speed 220 m³/h 50 Hz270 m³/h 60 HzUltimate pressure 130 mbarRated motor power 5.5 kW 50 Hz7.5 kW 60 HzVariants
DOLPHIN LM 0270 APumping speed 220 m³/h 50 Hz267 m³/h 60 HzUltimate pressure 130 mbarRated motor power 5.5 kW 50 Hz7.5 kW 60 HzVariants
DOLPHIN LT 0320 APumping speed 255 m³/h 50 Hz320 m³/h 60 HzUltimate pressure 33 mbarRated motor power 7.5 kW 50 Hz11 kW 60 HzVariants
DOLPHIN LB 0265 APumping speed 260 m³/h 50 Hz325 m³/h 60 HzUltimate pressure 33 mbarRated motor power 9.2 kW 50 Hz11 kW 60 HzVariants
DOLPHIN LX 0330 CPumping speed 280 m³/h 50 Hz330 m³/h 60 HzUltimate pressure 33 mbarRated motor power 7.5 kW 50 Hz11 kW 60 HzVariants
DOLPHIN LA 0325 APumping speed 320 m³/h 50 Hz350 m³/h 60 HzUltimate pressure 150 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LT 0430 APumping speed 340 m³/h 50 Hz419 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LB 0355 APumping speed 350 m³/h 50 Hz400 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LX 0430 CPumping speed 375 m³/h 50 Hz455 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LM 0530 APumping speed 405 m³/h 50 Hz551 m³/h 60 HzUltimate pressure 130 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LB 0425 APumping speed 420 m³/h 50 Hz500 m³/h 60 HzUltimate pressure 33 mbarRated motor power 15 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LA 0435 APumping speed 430 m³/h 50 Hz500 m³/h 60 HzUltimate pressure 150 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LT 0510 APumping speed 430 m³/h 50 Hz515 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz15 kW 60 HzVariants
DOLPHIN LA 0475 APumping speed 470 m³/h 50 Hz570 m³/h 60 HzUltimate pressure 130 mbarRated motor power 18.5 kW 50 Hz22 kW 60 HzVariants
DOLPHIN LT 0630 APumping speed 498 m³/h 50 Hz574 m³/h 60 HzUltimate pressure 33 mbarRated motor power 15 kW 50 Hz22 kW 60 HzVariants
DOLPHIN LB 0526 APumping speed 520 m³/h 50 Hz580 m³/h 60 HzUltimate pressure 33 mbarRated motor power 18.5 kW 50 Hz22 kW 60 HzVariants
DOLPHIN LT 0750 APumping speed 600 m³/h 50 Hz710 m³/h 60 HzUltimate pressure 33 mbarRated motor power 18.5 kW 50 Hz30 kW 60 HzVariants
DOLPHIN LB 0726 APumping speed 720 m³/h 50 Hz770 m³/h 60 HzUltimate pressure 33 mbarRated motor power 22 kW 50 Hz30 kW 60 HzVariants
DOLPHIN LM 0800 APumping speed 722 m³/h 50 Hz867 m³/h 60 HzUltimate pressure 130 mbarRated motor power 18.5 kW 50 Hz22 kW 60 HzVariants
DOLPHIN LA 0756 APumping speed 750 m³/h 50 Hz840 m³/h 60 HzUltimate pressure 130 mbarRated motor power 22 kW 50 Hz30 kW 60 HzVariants
DOLPHIN LB 0857 APumping speed 850 m³/h 50 Hz1,000 m³/h 60 HzUltimate pressure 33 mbarRated motor power 30 kW 50 Hz37 kW 60 HzVariants
DOLPHIN LA 0906 APumping speed 900 m³/h 50 Hz1,100 m³/h 60 HzUltimate pressure 130 mbarRated motor power 30 kW 50 Hz37 kW 60 HzVariants
DOLPHIN LR 0110 APumping speed 960 m³/h 50 Hz960 m³/h 60 HzUltimate pressure 33 mbarRated motor power 18.5 kW 50 Hz18.5 kW 60 HzVariants
DOLPHIN LA 1157 APumping speed 1,150 m³/h 50 Hz1,380 m³/h 60 HzUltimate pressure 130 mbarRated motor power 30 kW 50 Hz45 kW 60 HzVariants
DOLPHIN LB 1207 APumping speed 1,200 m³/h 50 Hz1,380 m³/h 60 HzUltimate pressure 33 mbarRated motor power 37 kW 50 Hz55 kW 60 HzVariants
DOLPHIN LR 0140 APumping speed 1,430 m³/h 50 Hz1,430 m³/h 60 HzUltimate pressure 33 mbarRated motor power 30 kW 50 Hz30 kW 60 HzVariants
DOLPHIN LA 1507 APumping speed 1,500 m³/h 50 Hz1,800 m³/h 60 HzUltimate pressure 130 mbarRated motor power 45 kW 50 Hz55 kW 60 HzVariants
DOLPHIN LB 1507 APumping speed 1,500 m³/h 50 Hz1,690 m³/h 60 HzUltimate pressure 33 mbarRated motor power 45 kW 50 Hz75 kW 60 HzVariants
DOLPHIN LB 1757 APumping speed 1,750 m³/h 50 Hz2,000 m³/h 60 HzUltimate pressure 33 mbarRated motor power 75 kW 50 Hz90 kW 60 HzVariants
DOLPHIN LA 1807 APumping speed 1,800 m³/h 50 Hz2,050 m³/h 60 HzUltimate pressure 130 mbarRated motor power 50 kW 50 Hz75 kW 60 HzVariants
DOLPHIN LA 1908 APumping speed 1,900 m³/h 50 Hz2,250 m³/h 60 HzUltimate pressure 130 mbarRated motor power 75 kW 50 Hz90 kW 60 HzVariants
DOLPHIN LB 2108 APumping speed 2,100 m³/h 50 Hz2,300 m³/h 60 HzUltimate pressure 33 mbarRated motor power 55 kW 50 Hz90 kW 60 HzVariants
DOLPHIN LR 0210 APumping speed 2,100 m³/h 50 Hz2,100 m³/h 60 HzUltimate pressure 33 mbarRated motor power 30 kW 50 Hz30 kW 60 HzVariants
DOLPHIN LA 2408 APumping speed 2,400 m³/h 50 Hz2,600 m³/h 60 HzUltimate pressure 130 mbarRated motor power 75 kW 50 Hz110 kW 60 HzVariants
DOLPHIN LB 2508 APumping speed 2,500 m³/h 50 Hz3,080 m³/h 60 HzUltimate pressure 33 mbarRated motor power 75 kW 50 Hz110 kW 60 HzVariants
DOLPHIN LA 2808 APumping speed 2,800 m³/h 50 Hz3,150 m³/h 60 HzUltimate pressure 130 mbarRated motor power 90 kW 50 Hz150 kW 60 HzVariants
DOLPHIN LB 3008 APumping speed 3,000 m³/h 50 Hz3,200 m³/h 60 HzUltimate pressure 33 mbarRated motor power 90 kW 50 Hz150 kW 60 HzVariants
DOLPHIN LR 0300 APumping speed 3,010 m³/h 50 Hz3,010 m³/h 60 HzUltimate pressure 33 mbarRated motor power 45 kW 50 Hz45 kW 60 HzVariants
DOLPHIN LA 3809 APumping speed 3,600 m³/h 50 Hz3,800 m³/h 60 HzUltimate pressure 130 mbarRated motor power 75 kW 50 Hz90 kW 60 HzVariants
DOLPHIN LB 3809 APumping speed 3,800 m³/h 50 Hz3,800 m³/h 60 HzUltimate pressure 33 mbarRated motor power 90 kW 50 Hz90 kW 60 HzVariants
DOLPHIN LR 0420 APumping speed 3,830 m³/h 50 Hz3,830 m³/h 60 HzUltimate pressure 33 mbarRated motor power 55 kW 50 Hz55 kW 60 HzVariants
DOLPHIN LB 4409 APumping speed 4,400 m³/h 50 Hz4,400 m³/h 60 HzUltimate pressure 33 mbarRated motor power 90 kW 50 Hz90 kW 60 HzVariants
DOLPHIN LA 5109 APumping speed 4,700 m³/h 50 Hz5,100 m³/h 60 HzUltimate pressure 130 mbarRated motor power 90 kW 50 Hz110 kW 60 HzVariants
DOLPHIN LR 0700 APumping speed 4,920 m³/h 50 Hz7,000 m³/h 60 HzUltimate pressure 33 mbarRated motor power 110 kW 50 Hz110 kW 60 HzVariants
DOLPHIN LR 0580 APumping speed 5,300 m³/h 50 Hz5,300 m³/h 60 HzUltimate pressure 33 mbarRated motor power 75 kW 50 Hz75 kW 60 HzVariants
DOLPHIN LG 0890 APumping speed 6,000 m³/h 50 Hz8,900 m³/h 60 HzUltimate pressure 160 mbarRated motor power 132 kW 50 Hz132 kW 60 HzVariants
DOLPHIN LR 1190 APumping speed 6,700 m³/h 50 Hz11,900 m³/h 60 HzUltimate pressure 33 mbarRated motor power 160 kW 50 Hz160 kW 60 HzVariants
DOLPHIN LG 1200 APumping speed 7,650 m³/h 50 Hz12,000 m³/h 60 HzUltimate pressure 160 mbarRated motor power 160 kW 50 Hz160 kW 60 HzVariants
DOLPHIN LR 1560 APumping speed 9,500 m³/h 50 Hz15,600 m³/h 60 HzUltimate pressure 33 mbarRated motor power 220 kW 50 Hz220 kW 60 HzVariants
DOLPHIN LG 1910 APumping speed 11,550 m³/h 50 Hz19,100 m³/h 60 HzUltimate pressure 160 mbarRated motor power 220 kW 50 Hz220 kW 60 HzVariants
DOLPHIN LR 2200 APumping speed 14,100 m³/h 50 Hz22,000 m³/h 60 HzUltimate pressure 33 mbarRated motor power 315 kW 50 Hz315 kW 60 HzVariants
DOLPHIN LG 2680 APumping speed 16,160 m³/h 50 Hz26,800 m³/h 60 HzUltimate pressure 160 mbarRated motor power 315 kW 50 Hz315 kW 60 HzVariants

Edwards EHR/SHR series 9 models

Edwards EHR2190Pumping speed 190.8 m³/h 50 Hz216 m³/h 60 HzUltimate pressure 30 mbarRated motor power 5.5 kW 50 Hz5.5 kW 60 HzVariants 3
Edwards EHR2290Pumping speed 291.6 m³/h 50 Hz331.2 m³/h 60 HzUltimate pressure 30 mbarRated motor power 7.5 kW 50 Hz7.5 kW 60 HzVariants 1
Edwards EHR2390Pumping speed 388.8 m³/h 50 Hz439.2 m³/h 60 HzUltimate pressure 30 mbarRated motor power 11 kW 50 Hz11 kW 60 HzVariants 3
Edwards SHR2400Pumping speed 608.4 m³/h 50 Hz698.4 m³/h 60 HzUltimate pressure 30 mbarRated motor power 22 kW 50 Hz30 kW 60 HzVariants 3
Edwards SHR2750Pumping speed 1,231.2 m³/h 50 Hz1,440 m³/h 60 HzUltimate pressure 30 mbarRated motor power 45 kW 50 Hz55 kW 60 HzVariants 3
Edwards SHR2950Pumping speed 1,681.2 m³/h 50 Hz1,918.8 m³/h 60 HzUltimate pressure 30 mbarRated motor power 55 kW 50 Hz75 kW 60 HzVariants 3
Edwards SHR21200Pumping speed 1,958.4 m³/h 50 Hz2,239.2 m³/h 60 HzUltimate pressure 30 mbarRated motor power 75 kW 50 Hz90 kW 60 HzVariants 2
Edwards SHR21850Pumping speed 3,279.6 m³/h 50 Hz3,816 m³/h 60 HzUltimate pressure 30 mbarRated motor power 110 kW 50 Hz132 kW 60 HzVariants 2
Edwards SHR22500Pumping speed 4,500 m³/h 50 Hz4,896 m³/h 60 HzUltimate pressure 30 mbarRated motor power 132 kW 50 Hz150 kW 60 HzVariants 2

Edwards LR1A series 12 models

Edwards LR1A700Pumping speed 601.2 m³/h 50 Hz698.4 m³/h 60 HzUltimate pressure 33 mbarRated motor power 18.5 kW 50 Hz30 kW 60 HzVariants 3
Edwards LR1A800Pumping speed 748.8 m³/h 50 Hz889.2 m³/h 60 HzUltimate pressure 33 mbarRated motor power 22 kW 50 Hz30 kW 60 HzVariants 3
Edwards LR1A1200Pumping speed 1,080 m³/h 50 Hz1,321.2 m³/h 60 HzUltimate pressure 33 mbarRated motor power 37 kW 50 Hz45 kW 60 HzVariants 3
Edwards LR1A1300Pumping speed 1,231.2 m³/h 50 Hz1,450.8 m³/h 60 HzUltimate pressure 33 mbarRated motor power 37 kW 50 Hz55 kW 60 HzVariants 3
Edwards LR1A1600Pumping speed 1,699.2 m³/h 50 Hz2,001.6 m³/h 60 HzUltimate pressure 33 mbarRated motor power 45 kW 50 Hz75 kW 60 HzVariants 3
Edwards LR1A2500Pumping speed 2,451.6 m³/h 50 Hz2,779.2 m³/h 60 HzUltimate pressure 33 mbarRated motor power 75 kW 50 Hz90 kW 60 HzVariants 3
Edwards LR1A4000Pumping speed 3,996 m³/h 50 Hz3,996 m³/h 60 HzUltimate pressure 33 mbarRated motor power 110 kW 50 Hz110 kW 60 HzVariants 3
Edwards LR1A5000Pumping speed 4,536 m³/h 50 Hz4,536 m³/h 60 HzUltimate pressure 33 mbarRated motor power 132 kW 50 Hz132 kW 60 HzVariants 3
Edwards LR1A5500Pumping speed 5,292 m³/h 50 Hz5,292 m³/h 60 HzUltimate pressure 33 mbarRated motor power 160 kW 50 Hz160 kW 60 HzVariants 3
Edwards LR1A6500Pumping speed 6,012 m³/h 50 Hz6,012 m³/h 60 HzUltimate pressure 33 mbarRated motor power 160 kW 50 Hz160 kW 60 HzVariants 3
Edwards LR1A8000Pumping speed 8,100 m³/h 50 Hz8,100 m³/h 60 HzUltimate pressure 33 mbarRated motor power 250 kW 50 Hz250 kW 60 HzVariants 3
Edwards LR1A500Pumping speed Ultimate pressure 33 mbarRated motor power 15 kW 50 Hz22 kW 60 HzVariants 2

Edwards LR1C series 9 models

Edwards LR1C030Pumping speed 27 m³/h 50 Hz31 m³/h 60 HzUltimate pressure 33 mbarRated motor power 0.81 kW 50 Hz1.27 kW 60 HzVariants 3
Edwards LR1C050Pumping speed 50.4 m³/h 50 Hz61.2 m³/h 60 HzUltimate pressure 33 mbarRated motor power 1.45 kW 50 Hz2.55 kW 60 HzVariants 3
Edwards LR1C080Pumping speed 79.2 m³/h 50 Hz93.6 m³/h 60 HzUltimate pressure 33 mbarRated motor power 2.35 kW 50 Hz3.45 kW 60 HzVariants 3
Edwards LR1C110Pumping speed 111.6 m³/h 50 Hz129.6 m³/h 60 HzUltimate pressure 33 mbarRated motor power 3.85 kW 50 Hz6.3 kW 60 HzVariants 3
Edwards LR1C150Pumping speed 165.6 m³/h 50 Hz194.4 m³/h 60 HzUltimate pressure 33 mbarRated motor power 4 kW 50 Hz5.5 – 6.3 kW 60 HzVariants 6
Edwards LR1C200Pumping speed 230.4 m³/h 50 Hz270 m³/h 60 HzUltimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.5 – 8.2 kW 60 HzVariants 6
Edwards LR1C300Pumping speed 280.8 m³/h 50 Hz331.2 m³/h 60 HzUltimate pressure 33 mbarRated motor power 7.5 kW 50 Hz11 – 12.9 kW 60 HzVariants 6
Edwards LR1C400Pumping speed 399.6 m³/h 50 Hz471.6 m³/h 60 HzUltimate pressure 33 mbarRated motor power 11 kW 50 Hz18.5 kW 60 HzVariants 6
Edwards LR1C500Pumping speed 500.4 m³/h 50 Hz579.6 m³/h 60 HzUltimate pressure 33 mbarRated motor power 15 kW 50 Hz18.5 kW 60 HzVariants 6

Edwards LR1D series 12 models

Edwards LR1D0035Pumping speed 20 m³/h 50 Hz28.8 m³/h 60 HzUltimate pressure 30 mbarRated motor power 0.9 kW 50 Hz1.12 kW 60 HzVariants 4
Edwards LR1D0060Pumping speed 42.6 m³/h 50 Hz45.7 m³/h 60 HzUltimate pressure 30 mbarRated motor power 1.94 kW 50 Hz2.24 kW 60 HzVariants 4
Edwards LR1D0100Pumping speed 69.5 m³/h 50 Hz90.1 m³/h 60 HzUltimate pressure 30 mbarRated motor power 2.8 kW 50 Hz4.1 kW 60 HzVariants 4
Edwards LR1D0135Pumping speed 101.1 m³/h 50 Hz130.5 m³/h 60 HzUltimate pressure 30 mbarRated motor power 3.06 kW 50 Hz4.1 kW 60 HzVariants 4
Edwards LR1D0170Pumping speed 117.7 m³/h 50 Hz148.2 m³/h 60 HzUltimate pressure 30 mbarRated motor power 3.8 kW 50 Hz4.1 kW 60 HzVariants 4
Edwards LR1D0260Pumping speed 168.5 m³/h 50 Hz208 m³/h 60 HzUltimate pressure 30 mbarRated motor power 5.78 kW 50 Hz7.46 kW 60 HzVariants 4
Edwards LR1D0340Pumping speed 252.7 m³/h 50 Hz301.6 m³/h 60 HzUltimate pressure 30 mbarRated motor power 7.8 kW 50 Hz11.19 kW 60 HzVariants 2
Edwards LR1D0510Pumping speed 336 m³/h 50 Hz393.2 m³/h 60 HzUltimate pressure 30 mbarRated motor power 10.82 kW 50 Hz14.92 kW 60 HzVariants 2
Edwards LR1D0770Pumping speed 476.7 m³/h 50 Hz578.7 m³/h 60 HzUltimate pressure 30 mbarRated motor power 14.92 kW 50 Hz18.65 kW 60 HzVariants 3
Edwards LR1D0940Pumping speed 729.6 m³/h 50 Hz880.5 m³/h 60 HzUltimate pressure 30 mbarRated motor power 23.13 kW 50 Hz29.84 kW 60 HzVariants 3
Edwards LR1D1280Pumping speed 951.5 m³/h 50 Hz1,193.4 m³/h 60 HzUltimate pressure 30 mbarRated motor power 28.35 kW 50 Hz41.03 kW 60 HzVariants 3
Edwards LR1D2040Pumping speed 1,340 m³/h 50 Hz1,644.1 m³/h 60 HzUltimate pressure 30 mbarRated motor power 42.15 kW 50 Hz60.43 kW 60 HzVariants 3

Elmo Rietschle L-BL2 series 7 models

L-BL2 2BL2 041Pumping speed Ultimate pressure Rated motor power 0.85 kW 50 Hz1.15 kW 60 HzVariants 4
L-BL2 2BL2 061Pumping speed Ultimate pressure Rated motor power 1.4 kW 50 Hz1.8 kW 60 HzVariants 4
L-BL2 2BL2 101Pumping speed Ultimate pressure Rated motor power 2.4 kW 50 Hz3.5 kW 60 HzVariants 4
L-BL2 2BL2 141Pumping speed Ultimate pressure Rated motor power 3.4 kW 50 Hz4.6 kW 60 HzVariants 4
L-BL2 2BL2 251Pumping speed Ultimate pressure Rated motor power 4.2 kW 50 Hz5.6 kW 60 HzVariants 4
L-BL2 2BL2 281Pumping speed Ultimate pressure Rated motor power 5.5 kW 50 Hz7.2 kW 60 HzVariants 4
L-BL2 2BL2 341Pumping speed Ultimate pressure Rated motor power 7 kW 50 Hz9.7 kW 60 HzVariants 4

Elmo Rietschle L-BV2 series 4 models

L-BV2 2BV2 060Pumping speed Ultimate pressure 33 mbarRated motor power 0.88 kW 50 Hz1.25 kW 60 HzVariants 5
L-BV2 2BV2 061Pumping speed Ultimate pressure 33 mbarRated motor power 1.5 kW 50 Hz2 kW 60 HzVariants 5
L-BV2 2BV2 070Pumping speed Ultimate pressure 33 mbarRated motor power 2.6 kW 50 Hz3.5 – 3.7 kW 60 HzVariants 5
L-BV2 2BV2 071Pumping speed Ultimate pressure 33 mbarRated motor power 4 kW 50 Hz6.1 kW 60 HzVariants 5

Elmo Rietschle L-BV3 series 1 model

L-BV3 2BV3 151Pumping speed Ultimate pressure 33 mbarRated motor power 0.3 kW 50 Hz0.4 kW 60 HzVariants 2

Elmo Rietschle L-BV5 series 5 models

L-BV5 2BV5 110Pumping speed Ultimate pressure 33 mbarRated motor power 4.2 kW 50 Hz5.6 kW 60 HzVariants 4
L-BV5 2BV5 111Pumping speed Ultimate pressure 33 mbarRated motor power 5.5 kW 50 Hz7.2 kW 60 HzVariants 4
L-BV5 2BV5 121Pumping speed Ultimate pressure 33 mbarRated motor power 7 kW 50 Hz9.7 kW 60 HzVariants 4
L-BV5 2BV5 131Pumping speed Ultimate pressure 33 mbarRated motor power 10.5 kW 50 Hz14.7 kW 60 HzVariants 4
L-BV5 2BV5 161Pumping speed Ultimate pressure 33 mbarRated motor power 12.4 kW 50 Hz16 kW 60 HzVariants 4

Elmo Rietschle L-BV7 series 3 models

L-BV7 2BV7 060Pumping speed Ultimate pressure 33 mbarRated motor power 0.85 kW 50 Hz1.15 kW 60 HzVariants 4
L-BV7 2BV7 070Pumping speed Ultimate pressure 33 mbarRated motor power 2.4 kW 50 Hz3.5 kW 60 HzVariants 4
L-BV7 2BV7 071Pumping speed Ultimate pressure 33 mbarRated motor power 3.4 kW 50 Hz4.6 kW 60 HzVariants 4

Model comparison

Models that a manufacturer no longer carries in its current range are not part of this overview; they are listed in its “Outdated models” section – for example under outdated Edwards models.

ABCDEFGH
  • Suction
  • Compression

Operating principle

How a liquid ring vacuum pump works

The impeller sits eccentrically in the pump housing and turns without touching it – it is the only moving part. The rotation presses the operating liquid against the housing wall as a ring; this ring seals the chambers between the blades from one another. Because the impeller sits eccentrically, the chambers first grow and then shrink again with every revolution.

The drawing shows the basic principle. The designs of the individual manufacturers differ in detail.

  1. SuctionThe gas flows through the inlet connection (A) and the suction port (B) into a chamber (E) that grows as the impeller turns.
  2. CompressionOn the other side the liquid ring (D) penetrates the chambers again: they shrink and the gas is compressed.
  3. DischargeThe gas and part of the operating liquid leave the pump through the discharge port (F) and the outlet connection (G).

Key figures

The technology in figures

The ranges result from the current models in our range.

Pumping speed (50 Hz)

20 to 36,600 m³/h

in our range

Ultimate pressure

25 to 160 mbar

in our range

Rated motor power (50 Hz)

0.3 to 800 kW

in our range

Ultimate pressure compared (mbar, logarithmic)

10⁻³10⁻²10⁻¹11010²10³Liquid ring vacuum pumps: models with a stated ultimate pressureOil-lubricated rotary vane vacuum pumps: 256 models

For comparison: the oil-lubricated rotary vane vacuum pumps in our range reach 1 × 10⁻³ to 20 mbar.

What characterises the technology

One moving part

The impeller is the only moving part inside and turns in the housing without contact.

Operating liquid

For stable operation, liquid must be supplied to the pump continuously. It forms the sealing ring and is expelled again with the gas.

Recirculation operation

A recirculation unit returns the expelled operating liquid to the pump. The pump then needs considerably less fresh liquid.

Humid processes

Liquid ring vacuum pumps are used mainly in humid and wet processes – depending on the version, with corrosion-resistant materials such as stainless steel or ceramic.

Advantages

What speaks for this technology

  • Suitable for humid and wet processes
  • Only one moving part inside
  • Impeller runs without contact
  • Constant operating characteristics
  • High abrasion resistance
  • Corrosion-resistant materials, depending on the version
  • Quiet running

Applications

Where they work

  • Food and beveragesdairy industry, filtration systems, water degassing, preservation, sugar production
  • Packaging machinesfilling and sealing machines, blister machines, filling of PET bottles
  • Ceramics and bricksdegassing of ceramic bodies
  • Water and environmentwater degassing, groundwater lowering, seawater desalination, sewage treatment plants
  • Textiles and tobaccoyarn steaming, tobacco humidification
  • Further applicationsdrying systems, central vacuum systems, steam turbines, lifting and handling

Frequently asked questions

Questions about liquid ring vacuum pumps

How does a liquid ring vacuum pump work?

An impeller that sits eccentrically in the housing turns in a ring of operating liquid. The ring seals the chambers between the blades; because the impeller sits eccentrically, the chambers grow and shrink again with every revolution – the gas is drawn in, compressed and expelled. The drawing in the section Operating principle shows every step.

What ultimate pressure do liquid ring vacuum pumps reach?

The models in our range state ultimate pressures from 25 to 160 mbar. The value that can be reached also depends on the vapour pressure of the operating liquid – in the case of water, that is, on its temperature. In the product overview, the “Ultimate pressure” filter narrows down the selection.

Why does the pump need operating liquid?

The operating liquid forms the ring that seals the chambers. Because part of it is expelled with the gas, liquid has to flow in continuously – as fresh liquid or via a recirculation unit that returns the expelled liquid to the pump.

From which manufacturers does Ehrler & Beck carry this technology?

Currently from Atlas Copco, Busch, Edwards and Elmo Rietschle. The series are listed in the section Manufacturers and series.

How do I find the right model?

In the product overview, the filters narrow down the selection by the key figures of the models. For sizing, it is best to tell us the gas to be conveyed, the working pressure and the flow rate you need – we will be glad to advise you.

What do the figures for 50 Hz and 60 Hz mean?

Flow rate and rated motor power depend on the mains frequency. The overview therefore shows both values wherever the manufacturer states them, and the size filters can be switched between 50 Hz and 60 Hz.

Does Ehrler & Beck also supply spare parts and service?

Yes. Ehrler & Beck offers original spare parts and accessories as well as maintenance and repair.

Which model fits your process?

Tell us the gas to be conveyed, the working pressure and the flow rate you need – we will advise you on selection, spare parts and service.

Send an enquirySpare parts and accessoriesService