Oscillating Pumps


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Product Overview

Oscillating pumps are self-priming, corrosion resistant, have no dynamic seals and are constructed from FDA accepted materials.
These pumps are intended for replenishing, transfer and circulating installations.


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 pound.

Motors: 115V, 230V 50/60 Hz – requires a diode (included with listed models).

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

  • Glass-Reinforced Polypropylene

Refer to the Chemical Resistance Section 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).


  • Self-priming
  • Compact
  • Economical
  • Spring styles: Leaf Spring – extremely quiet
  • Spring styles: Coil Spring – higher flow & efficiency, greater priming ability
  • Outlet valve styles: 2-Piece allows higher flow; no backflow prevention
  • No dynamic seals
  • Lightweight
  • Can operate continuously
  • Moisture & corrosion resistant coil
  • Outlet valve styles: Poppet – prevents backflow thru pump


  • Film and microfilm processors
  • Litho and graphic arts plate processors
  • Detergent dispensing
  • Chemical mixing
  • Medical, scientific and laboratory equipment


Valve Styles

113755_185_bw_aTo modify the priming or performance characteristics of the pump, two valve options are available: poppet valve or 2-piece valve. The poppet valve provides the best priming capability and more positively prevents backflow through the pump. The 2-piece valve generally delivers higher flows than the poppet valve.

Note: Valves are utilized on the discharge side of the pump. However, to more closely meet a customer’s specifications, valves can be used on both the inlet and outlet side.

Tubing Connectors

1/8″ – 3/16″ I.D. Tubing
1/4″ I.D. Tubing
3/8″ I.D. Tubing
113755_181_bw_a11973 3/8″ I.D. Tubing
11973-000 (Polypropylene – Black) 11973-006 (Glass-Filed Noryl® – Gray)
1/2″ I.D. Tubing
113755_181_bw_a11687 1/2″ I.D. Tubing
11687-000 (Polypropylene – Black) 11687-002 (Glass-Filled Noryl® – Gray)
1/8″ – 3/16″ I.D. Tubing
113755_184_bw_a15467 1/4″ I.D. Tubing
15467-005 (Polypropylene – Black) 15467-013 (LCP – Almond)
3/8″ I.D. Tubing
1/2″ I.D. Tubing

Coils, Leads and Terminals

113755_45_aGenerally, electrical coils are available in 115V or 220V and 60 Hz. However, pumps have been supplied with 115V or 220V, 50 Hz coils, and with 12, 24, and 48 volt AC coils. In addition, coils can be constructed with different power capabilities to more effectively meet customer’s duty cycle needs.

Leads can be up to 6 feet long with any termination. Most common are 6 inch leads with 1/4 inch male spade terminals.

Mounting Options

The oscillating pump can be provided with three mounting styles.

1. Rubber Mount
2. Spring Mount with Base
3. Spring Mount

The rubber mount design is more compact and less expensive; however, flow rate, priming capability and discharge head are lower than the spring mounted pumps. The spring mounted model is more efficient and transmits less vibration to the mounting structure.

GRI specializes in the design and manufacturing of customized pumps for the OEM market. Click here to see a listing of available OEM options.


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 Series Spring Style Outlet Valve Flow Rates Discharge Head Maximum Fluid Temperature Motor Specs/Voltages
14825 Leaf Poppet 0.2 – 0.8 GPM 8.3 FT
(On Standard Models)
104°F (40°C) 115, 230, 50/60 Hz
15000 Coil Poppet 0.2 – 0.8 GPM 8.3 FT
(On Standard Models)
104°F (40°C) 115, 230, 50/60 Hz
17000 Coil 2-Piece 0.2 – 0.8 GPM 8.3 FT
(On Standard Models)
104°F (40°C) 115, 230, 50/60 Hz