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 biotech industries.

Standard Sizes

1/4" - 10" diameter 

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

Corrosion Guide for Common Piping Materials and Seal Elastomers (PDF)

Asahi/America

• Size Range:  1/2" - 10"
• Materials:  PVC, CPVC, PP and PVDF
• Products:  Type 14 Flanged, Type 14 True Union, Type 15 Flanged, AD-16 Compact Diaphragm Valve, Type G, TI Diaphragm Valve

Chemtrol®

• Size Range:  1/2" - 4"
• Materials:  PVC, CPVC, PP and PVDF
• Products:  Diaphragm Valve

+GF+

• Size Range:  1/2" - 6"
• Materials:  PVC and CPVC
• Products:  Type 314, Type 315, Type 317, DIASTAR 025, DIASTAR 028FC

Hayward

• Size Range:  1/2" - 10"
• Materials:  PVC, CPVC, PP and PVDF
• Products:  DAB Series Industrial Diaphragm Valve

Plast-O-Matic

• Size Range:  1/4" - 1 1/2"
• Materials:  PVC, CPVC, PP, PVDF and PTFE
• Products:  Series BSDA Air-Operated Miniature Diaphragm Valve

Spears

• Size Range:  1/2" - 8"
• Materials:  PVC, CPVC and PP
• Products:  Diaphragm Valve