Busch DOLPHIN series
The Busch DOLPHIN series comprises robust single-stage and two-stage liquid ring vacuum pumps for demanding industrial applications. The nearly isothermal compression allows the safe conveying of gases that are sensitive, hazardous or laden with vapours and particles.
- 70Models
- 25–16,160m³/h pumping speed at 50 Hz
- 33mbar lowest ultimate pressure
- 1.1–315kW rated motor power at 50 Hz
Product overview
Products of the Busch DOLPHIN series
Use the filters on the left to narrow the models down by their key figures. Each row leads to the model with its technical data and variants.
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 No model matches these filters.
DOLPHIN series 70 models
About the series
Features and benefits of the DOLPHIN series
The series at a glance
The range offers numerous versions for different requirements – from compact monoblock pumps to completely assembled systems. Depending on the model, different operating liquids as well as vacuum and compressor operation are possible.
The DOLPHIN series features high vapour and particle tolerance, robust construction, reliable operation and easy maintenance. The various ranges LA/LB, LG/LR, LM/LT, LN, LX and VL allow flexible adaptation to a wide variety of process conditions.
Typical areas of application are demanding industrial processes, the conveying of vapours and gases, and applications with harsh or humid process conditions.
With the DOLPHIN series, Busch offers a powerful range of liquid-sealed liquid ring vacuum pumps that was developed for reliable operation, high robustness and demanding process conditions. The proven liquid ring principle allows the reliable conveying of moist, contaminated and condensable gases as well as vapours. Thanks to the robust construction and the continuous cooling by the operating liquid, the DOLPHIN series offers a durable and versatile solution for numerous industrial vacuum applications.
Reliable with moist gases
The proven liquid ring principle allows reliable operation even with moist, contaminated or condensable gases and vapours.
Robust and durable
The robust construction and the continuous cooling by the operating liquid allow reliable operation even under demanding process conditions. At the same time, maintenance requirements are kept low.
Versatile in use
The DOLPHIN series is suitable for numerous industrial vacuum applications and, depending on the version, can be adapted to different process conditions and operating liquids. It is particularly suitable for processes involving moisture, vapours and condensable media.
Operating principle
The Busch DOLPHIN series works on the principle of liquid-sealed liquid ring vacuum technology. An eccentrically arranged impeller rotates inside the pump housing and forms a liquid ring by means of the operating liquid used. This ring creates the necessary working chambers, in which the gas drawn in is continuously taken in, compressed and then discharged through the outlet.
The operating liquid provides both the sealing and the cooling of the compression chamber. This makes the DOLPHIN series particularly suitable for applications in which moist, contaminated or condensable gases and vapours have to be conveyed reliably.
The robust pump design and the proven liquid ring principle allow reliable and durable operation even under demanding process conditions. Depending on the version, different operating liquids can be used, which allows the pumps to be adapted flexibly to various applications.
The DOLPHIN series is suitable for numerous industrial applications that call for reliable vacuum generation, high resistance to moisture and the conveying of condensable or contaminated gases.
The technology page shows the operating principle with an interactive drawing: Liquid ring vacuum pumps.
Standard operating conditions and performance
- Ambient temperature: 5 to 40 °C, depending on model and version
- Designed for liquid-sealed vacuum applications
Frequently asked questions
Questions about the Busch DOLPHIN series
Which models does the Busch DOLPHIN series comprise?
Which pumping speeds does the series cover?
What ultimate pressure do the models of the series reach?
How does the technology of the series work?
Does Ehrler & Beck supply spare parts and service for the Busch DOLPHIN series?
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.
