GRI’s Bellows Metering Pumps utilize GRI’s proven bellows and valving technology to provide an accurate and economical metering pump with long life. The proprietary blended polypropylene materials of construction and a wide selection of valve and O-ring elastomers produce chemical resistant pumps capable of handling a wide range of fluids.
Bellows Metering Pumps were specifically designed for metering applications requiring low discharge pressures. Bellows pumps have been successfully applied in photo, X-ray and dental film processors, silver recovery systems, scientific and analytical instruments, wafer and silicon chip washers and processors, detergent dispensers, blood analyzing equipment, industrial floor scrubbers, thermal therapy equipment, waste removal systems, and wastewater and water treatment systems.
Max. Discharge Pressures: Range from 5 to 50 psi depending on bellows size.
Max. Fluid Temperature: To 140°F (60°C). Reduce pressure rating by 50% for fluid temperatures over 120°F (49°C).
Viscosity/Slurries: Maximum fluid viscosity is 5,000 centistokes. Poppet valves can handle fine slurries. Duckbill valves are recommended for heavy slurries or fibrous materials.
- Connectors – Polypropylene.
- O-Rings (Elastomers) – EPT/EPDM, or Viton®/Fluoroelastomer.
- Poppet/Duckbill Valves – EPT/EPDM, or Viton®/Fluoroelastomer.
- Bellows – Standard Polypropylene Materials.
Additional materials available, Contact GRI.
- Repeatability from stroke-to-stroke to ± 0.5%
- Corrosion resistant
- Long life
- Dry run capability
- No dynamic seals
- Maintenance free operation
- Simple flow adjustment
- Multiple OEM options
|Click link for series information>||Standard||Compact||Mini||Dosing|
|Flow Rates||3.9 to
Tandem Max flow 3,000
Tandem Max flow 432
|2.7 to 240 ml/min||3.3 to 43.2 ml/min|
|Max Discharge Pressure||5 to 50 psi||5 psi||5 psi||5 psi||5 psi|
|Max Fluid Temperature||140°F (60°C)||140°F (60°C)||140°F (60°C)||140°F (60°C)||140°F (60°C)|
|Max Fluid Viscosity||5,000 centistokes||5,000 centistokes||5,000 centistokes||5,000 centistokes||5,000 centistokes|
|Crank||Standard, BEL O JUST®||Standard||Standard||Fixed||Fixed|
|Module Count/Fluids||Dependent on Series||Up to four||Up to two||One||One|
|Click pump image for a printable Product Overview Sheet and
Pump Selection Guide.