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.
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 pound 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 & 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).
Features
Self-priming
No dynamic seals
Compact
Lightweight
Economical
Can operate continuously
Spring styles: Leaf Spring - extremely quiet
Moisture & corrosion resistant coil
Spring styles: Coil Spring - higher flow & efficiency, greater priming ability
Outlet valve styles: 2-Piece allows higher flow; no backflow prevention
OEM Options
Valve Styles
To 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 should be used when flow is required.
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.
Generally, 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. 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.
