lr1a5500 - LR1A5500 Liquid Ring Pump

LR1A5500 Liquid Ring Pump



Edwards offers a full range of liquid ring pumps. The LR1A5500 provides a single-stage design and curved blade impellor with reinforcing rings for improved ruggedness, reducing noise and vibration.
All of our liquid ring pumps handle wet or dry gases, with high tolerance to liquid carry over. The LR1A Series has an enhanced bearing design enabling reduced internal clearances for improved efficiency. Pumps are available in cast iron and 316 stainless steel construction as standard with other materials and corrosion resistant coatings available.

The LR1A5500 is a bare-shaft machine and can be supplied as part of a standard package, incorporating electric motor, base-plate and seal liquid recovery system, suitable for once through, partial or total recirculation. Custom engineered packages are also available, please contact your local office for more complex process system requirements.


  • The LR1A5500 is ideal for condenser evacuation, pulp and paper, filtration, flue gas desulphurization, vacuum forming and chemical and petrochemical applications.

Features and Benefits

  • Optional central partition enabling dual vacuum duty operation
  • Variable area discharge port for optimum performance at all inlet pressures
  • Flange-mounted casing construction for extra rigidity
  • Top and side inlet/outlet flange options for installations with limited headroom
  • Packed gland, single and double mechanical seal options
  • Split packing gland design to facilitate repacking
  • Internal and external seal flushing options
  • Internal recirculation option to reduce service liquid flow rate
  • Optional inlet manifold and top-mounted separator to reduce footprint

Technical Data

  50 Hz 60 Hz
Nominal capacity (saturated) 5300 m3h-1 5300 m3h-1

3100 CFM 3100 CFM

Suction pressure 33 mbar 33 mbar

25 Torr 25 Torr
Nominal speed 590 rpm 580 rpm
Nominal motor power 132 kW 132 kW

200 HP 200 HP



A (keyway) B C D E F G H J
mm 127 335 910 1745 875 1132 1570 555 800
Inch 5.0 13.19 35.83 68.70 34.45 44.57 61.81 21.85 31.50

mm 503 170 560 1370 285 285 245 4 holes Ø 24
Inch 19.80 6.69 22.05 53.94 11.22 11.22 9.65 0.94

1. DN250 / PN10

     2. DN200 / PN10

     3. DN125 / PN10

     4. Outlet

     5. Inlet

*Flanges available in both DIN and ANSI standards