Product Announcement from GRI Pumps (A Gorman-Rupp Company)


Piston Diaphragm Pumps-Image

Piston diaphragm pumps are positive displacement pumps designed to economically transfer small volumes of fluid at low discharge pressures. The lightweight, compact pumps are self-priming, corrosion resistant and can handle viscous fluids. These features make the pumps ideal for high volume copy machines, scientific and laboratory instruments and other chemical dispensing applications.

Operation:
Standard models are constructed with 12 or 24 volt DC solenoids. A switch is required to supply pulsed voltage to the pump. The energized solenoid pulls the piston and diaphragm up, drawing fluid into the pump. A spring forces the piston back to its original position when the solenoid is de-energized, forcing fluid out of the pump, and the cycle is repeated. Valves are utilized to prevent back-flow into the pump and to maintain prime.

Specifications:

  • Flow Rate — Range to 250 microliters per stroke
  • Max Discharge Pressure — Range to 2.6 psi (6')
  • Self-Priming — To 3 feet
  • Max Fluid Viscosity — To 300 centistokes
  • Max Fluid Temperature — To 200°F (93°C)
  • Typical Duty Cycle — 1 cycle/second (1⁄2 sec. on - 1⁄2 sec. off). Higher frequency operation achievable with external driver.
  • Metering Accuracy — ±2% stroke-to-stroke (for a stationary setup)
  • I.D. Tubing Size — 3⁄16"
  • Approximate Weight — .265 lb.

Note: Positive suction head above 6" requires tight valves; consult factory for availability.

Features:

  • Economical
  • Self-priming
  • No dynamic seals
  • No backflow
  • Continuous duty rated
  • Corrosion resistant
  • Dry run capability                           

Piston Diaphragm Pumps Overview (PDF)

Registered Trademark Names

©2005, Gorman-Rupp Industries

 
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