lr1b3500 - LR1B3500 Liquid Ring Pump

LR1B3500 Liquid Ring Pump



Edwards offers a full range of liquid ring pumps. The LR1B3500 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 LR1B 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.

All are tested to DIN 28431:1987 and are available as part of ATEX Category 1 and 2 T4 systems.
The LR1B3500 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 LR1B3500 is ideal for fly ash conveying, pulp and paper, filtration, flue gas desulphurization, methane extraction in mining 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) 3300 m3h-1

1900 CFM
Suction pressure 160 mbar

120 Torr
Nominal speed 590 rpm
Nominal motor power 75 kW

100 HP



A (keyway) B C D E F G H J
mm 106 315 790 1580 815 890 1360 480 670
Inch 4.17 12.40 31.10 62.20 32.09 35.04 53.54 18.90 26.38

mm 495 137 475 1185 230 230 205 4 holes Ø 35
Inch 19.49 5.39 18.70 46.65 9.06 9.06 8.07 1.38

1. DN200 / PN10

    2. DN150 / PN10

    3. DN100 / PN10

    4. Outlet

    5. Inlet

*Flanges available in both DIN and ANSI standards