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:
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Economical
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Self-priming
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No dynamic seals
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No backflow
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Continuous duty rated
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Corrosion resistant
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Dry run capability
OEM Options :
Options
To meet OEM specifications, the following features can be added:
Fixed flow up to 500 microliters per stroke for low heads
Fixed flow can be down to 100 microliters per stroke
