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Hydraulic and pneumatic pump construction, performance (controls and operation), and application notes from the field.

Oscillating Pumps

Product Announcement from GRI Pumps (A Gorman-Rupp Company)

Oscillating pumps are self-priming, corrosion resistant, have no dynamic seals and are constructed from FDA accepted materials.

Oscillating Pump Operation:

An elastomeric impeller extends through a spring and armature and into an electric coil. A diode in the circuit feeds 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.

Pump Specifications:

  • Flow Rates - Generally range from 0.2 to 0.8 gpm. Flow rates 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 pound
  • Motors - 115v, 230v 50/60 Hz

Materials in Contact with Solution: EPT/EPDM & Glass-Reinforced Polypropylene.

OEM Applications:

  • 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.

Registered Trademark Names

©2005, Gorman-Rupp Industries