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These pumps are intended for replenishing, transfer and circulating installations.

Oscillating Diaphragm Pump Operation: An elastomeric diaphragm is attached to an armature assembly, which extends into an electric coil. A diode in the circuit feeds DC impulses to the electrical coil 60 times per second. Each pulse draws the armature and diaphragm toward the pump head discharging liquid through the duckbill portion of a combination valve and out the discharge port. The springs then return the armature and diaphragm pulling liquid in past the umbrella portion of the valve from the inlet of the pump. Each portion of the combination valve presents back flow as the diaphragm movement provides the positive displacement.

Pump Specifications:
Flow Rates — To 350 ml/min. Actual flow may be higher and may vary from pump to pump. Due to this inherent characteristic, these pumps are not normally intended for metering.
Discharge Head — To 35 psi
Self-Priming — To 5 feet (1.5 m)
Max Fluid Temperature — To 104°F (40°C), higher temperatures with intermediate continuous duty.
Weight — Approximately 1 lb.
Coils — For AC, requires diode (included with listed models).
115V, 50/60 Hz
230V, 50/60 Hz
Agency Approvals — FDA listed materials for models listed in chart.