Piston Diaphragm Pumps0 pages

PistonDiaphragm_Product_Overview 01/17/11
180 Hines Ave. • Bellville, OH 44813 • PH: 419-886-3001 • FAX: 419-886-2338 • GRIsales@GRIpumps.com • www.GRIpumps.com
Piston Diaphragm Pumps
Product Overview
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 (12 sec. on - 12 sec. off). Higher frequency operation achievable with external
driver.
Metering Accuracy: ±2% stroke-to-stroke (for a stationary setup)
I.D. Tubing Size: 316”
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