EMS Ram Pumps

RAM Pumps by EMS

Filter Press Feed Pumps/Grit Removal/Primary Sludge Transfer Pumps/Food Waste Pumps

Often referred to as plunger, reciprocating or piston pumps, EMS RAM PUMPS offer a greater suction lift for dredging and pumping sewage, waste water, filter press feed, backwash and grout or effluent.

The Positive Displacement EMS RAM PUMPS are robustly designed and constructed of S.G. iron castings with stainless steel features for the most aggressive environments. Our PUMPS are available in a variety of materials to address “target applications” of grit & sand removal, dredging, grout pumping, primary sludge transfer, filter press feed, kaolin and clay pumping.

EMS Pump Size Chart

ModelDriveFlow GPM (lit/min)Pressure Range PSI (bar)
CVR200Mechanical15-80 (60-300)0-60 (0-4)
VRM175Mechanical24-55 (90-210)0-75  (0-5)
VRH175Hydraulic24-55 (90-210)0-725 (0-50)
VRM250Mechanical65-110 (240-420)0-75  (0-5)
VRH250Hydraulic65-135 (240-500)0-725 (0-50)
VRH350Hydraulic130-240 (500-900)0-435 (0-30)
VRH400Hydraulic240-320 (900-1200)0-435 (0-30)
VRH500Hydraulic320-475 (1200-1800)0-435 (0-30)


The heavy duty, hydraulically-driven VRH is the most powerful pump in the range. Available in sizes shown above, the VRH line of EMS RAM PUMPS is suitable for pumping high solids viscous material and features large gravity ball type sludge check valves.


  • Ideal for heavy duty sludge transfer
  • Tungsten carbide coated sludge ram
  • Suitable for continuous use
  • Slow speed operation
  • Huge suction draws thick sludge
  • Numerous hydraulic and electronic control designs & options
  • Up to 500m delivery head
  • Up to 30 lit/sec flow
  • Minimal maintenance
  • Duplex and triplex options with near laminar flow


The mechanically-driven VRM is one of the most popular pumps in the range. The mechanical arrangement features vee belts, a reduction gearbox and a crankshaft final drive providing a basic, simple to understand driveline. VRM Pumps are available in various sizes.

Sludge non-return valves come in various designs and can be positioned in-line or at right angles to each other allowing the pump to be installed in tight spaces. All VRM pumps create a suction vacuum equivalent to 9 meters (30 ft) static suction lift.


  • Ideal for heavy duty desolating
  • Hard wearing tungsten carbide coated ram
  • Suitable for continuous use 24/7
  • Slow speed, quiet operation
  • Huge suction draws thick sludge up to 15%ds
  • Simple construction
  • Up to 50m (165 ft) delivery head
  • Up to 6.5 lit/sec (103 gpm)
  • Minimal maintenance

EMS Pumps are Suitable for the Following Applications

Slurry Pump Applications

  • Abrasive/Aggressive
  • Biogas Feed
  • Cement
  • Ceramic
  • Clay
  • Delicate Shear Sensitive
  • De-sludging
  • Dredging
  • Filter Press Feed Pump
  • Food Waste Pump
  • Grit & Sand
  • Grout
  • High Pressure
  • High Solids
  • High Viscosity
  • Kaolin
  • Mining/Ore
  • Primary Sludge Transfer
  • Tailings: Coal, Ore

Pump Capabilities

  • Flow Rates: 15-475 GPM /(3-108 m3/hr)
  • Suction Lift: 9 meters /(30 feet)


(770) 592-8664