Diaphragm Valves

Diaphragm valves consist of a valve body, a diaphragm, and a "weir" or saddle upon which the diaphragm closes the valve. While diaphragm valves usually come in two-port forms, they can also come with three ports and even more. When more than three ports are included, they generally require more than one diaphragm. Diaphragm valves can be manual or automated and are easy to clean. They are excellent for controlling the flow of fluids containing suspended solids and offer the flexibility of being installed in any position. Diaphragm valves are ideal for flow control by offering a variable and precise opening for controlling pressure drop through the valve. Their application is generally as shut-off valves in process systems within the food and beverage, pharmaceutical and bio-tech industries.

Standard Sizes

1/2" - 10" diameter

Sizes and materials are brand specific. Click on a manufacturer below for available products. Please contact Aetna Plastics for pricing information.

To view material Corrosion Guides, visit our Technical Specifications page.


  • Size Range: 1/2" - 10"
  • Materials: PVC, CPVC, PP and PVDF
  • Products: Type 14 Flanged, Type 14 True Union, Type 15 Flanged, Type G, TI Diaphragm Valve
Georg Fischer
  • Size Range: 1/2" - 6"
  • Materials: PVC, CPVC, PP, PVDF, & ABS
  • Products: 5 Series, Type 317, 5 Series DIASTAR Pneumatically Actuated
  • Size Range: 1/2" - 6"
  • Materials: PVC, CPVC, PP and PVDF
  • Products: DAB Series Industrial Diaphragm Valve
  • Size Range: 1/2" - 8"
  • Materials: PVC, CPVC and PP
  • Products: Diaphragm Valve