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Oscillating Pumps

Operating Principle:

An elastomeric impeller extends through a spring and armature and into an electric coil. A diode in the circuit feeds DC impulses to the coil 50 or 60 times per second. Each pulse draws the armature and impeller forward against the spring, pumping liquid through the outlet. The spring returns the armature and impeller to their original position, drawing liquid through the inlet. A valve and a discharge poppet in the impeller prevent backflow of liquid. These pumps are intended for replenishing transfer and circulating applications.

Can these pumps be installed vertically?

Yes.

How can I decide whether to use a coil spring or leaf spring style?

The leaf spring units are quieter but the flow rate is lower than coil spring models. The 15000 series coil spring pumps are medium powered and are the least quiet of the Oscillating pumps. 17000 series are the most powerful Oscillating pumps that we offer.

What is the difference between poppet valves and the two-piece segment valves?

The poppet valve provides a positive seal which prevents backflow through the pump. The two-piece segment valve yields higher flow rates, but does not prevent backflow.

Can these pumps be operated on DC?

Yes, but you will need to install an electronic device that quickly cycles the voltage off and on. 50 to 60 times per second is ideal.

Can I use an Oscillating pump for chemicals that are more aggressive than the chemical resistant chart allows?

Yes, we offer glass ball center valve units. Please contact GRI.

Can these pumps be operated 24 hours a day, 7 days a week?

Yes.

Does the flow rate change with the different elastomers offered?

Yes, please contact GRI.

Are these pumps suitable for air pumping applications?

Yes, but special modifications are required. Please contact GRI.

Oscillating Pumps Overview (PDF 204K)

OEM Options (PDF 204K)

Service Data Sheet - 14825 (PDF 169K)

Service Data Sheet - 15000/17000 (PDF 247K)

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