Oscillating Pumps0 pages

Oscillating Pumps
Product Overview
Oscillating pumps are self-priming, corrosion resistant, have no dynamic seals and are constructed from FDA
accepted materials.
Typical applications include film and microfilm processors; litho and graphic arts plate processors; detergent
dispensing, chemical mixing, medical, scientific and laboratory equipment.
These pumps are intended for replenishing, transfer and circulating installations.
Oscillating Pump Operation: An elastomeric impeller extends through a spring and armature and 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 impeller forward against the spring, causing the impeller to pump a volume of liquid out through
the outlet port. The spring then returns the armature and impeller to their starting position, drawing liquid through
the inlet. A valve in the impeller prevents backflow of liquid.
Typical OEM applications include film processors, Laser and x-ray cooling systems, medical, scientific, laboratory and silver recovery equipment. Magnetic drive centrifugal pumps must be used where flooded suction
conditions exist.
Pump Specifications:
Flow Rates: Generally range from 0.2 to 0.8 gpm – refer to performance curve. 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 8.3 feet (on standard models)
Self-Priming: To 48 inches (on standard models)
Fluid Temperature: To 104°F (40°C)
Weight: Approximately 1 lb.
Motors: For AC, requires diode (included with listed models). For DC, requires pulsed voltage (on & off approximately 50 to 60 times per second).
Agency Approvals: Most models listed in charts provided herein bear the UL Recognized Component Mark
for the United States and Canada (except 14925 Series “Lab” models). Most models also have FDA listed wetted materials of construction for use in food consumable applications. NSF materials are also available. Please
consult factory for details on specific models.
Materials in Contact with Solution: EPT/EPDM, FKM, Butyl, and Glass-Reinforced Polypropylene,
Refer to the Chemical Resistance Charts under Product Resources on GRI’s website to help determine compatibility. (Use only elastomers with “A” rating for standard oscillating pumps.)
For aggressive-chemistry applications, contact GRI for special Glass-Ball Center Valve Oscillating Pumps (U.S.
Patent 5,567,131).

180 Hines Ave. • Bellville, OH 44813 • PH: 419-886-3001 • FAX: 419-886-2338 • GRIsales@GRIpumps.com • www.GRIpumps.com
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