Indu

Diaphragm Valve

Industrial systems often handle chemicals, wastewater, slurries and other fluids that require reliable isolation. As a Diaphragm Valve Manufacturer in Canada, Valves Only Canada supplies diaphragm valves for industrial applications where effective shut-off, fluid compatibility and ease of maintenance are important.

A diaphragm valve controls flow through a flexible diaphragm that moves against a weir or seat to open or close the passage. The diaphragm separates the process fluid from the valve stem and operating mechanism, helping protect these components from direct contact with the medium. This design makes diaphragm valves a practical choice for many water treatment, chemical processing and general industrial applications.

Diaphragm valves are available in weir-type and straight-through designs. The right option depends on the fluid being handled, the required flow rate, operating pressure and temperature, and the materials needed for the application.

Features

  • Flexible diaphragm provides effective shut-off against the valve seat or weir.
  • Keeps the process fluid separate from the stem and operating mechanism.
  • Suitable for compatible chemicals, wastewater and certain slurry applications.
  • Available in weir-type and straight-through designs.
  • Manual handwheel, pneumatic and electric operation options.
  • Simple construction with fewer wetted moving parts to maintain.
  • Lined and unlined body options for different service conditions.
  • Body and diaphragm materials selected to suit the process fluid.
  • Flanged and threaded connections available for compatible configurations.
  • Suitable for on/off service and flow regulation where the design allows.

Technical Specifications

Parameter Specification
Valve Type Diaphragm Valve
Design Weir Type or Straight-Through Type
Nominal Size DN15–DN300
Body Materials Cast Iron ASTM A126 Class B; Ductile Iron ASTM A536 Grade 65-45-12; Cast Steel ASTM A216 Grade WCB; Stainless Steel ASTM A351 Grade CF8 or CF8M
Operation Manual Handwheel, Pneumatic or Electric
End Connections Flanged or Threaded, according to model
Flow Control On/Off Isolation or Flow Regulation where suitable
Operating Media Water, wastewater, compatible chemicals and slurries
Primary Applications Chemical Processing, Water Treatment and Industrial Fluid Handling

Standards and Testing

Diaphragm valves should be selected according to their design, pressure rating, materials and intended service. ASME B16.5 may apply to compatible flanged connections, while ASME B16.34 may apply to valve designs within its scope.

Industries Served

  • Chemical Processing
  • Water and Wastewater Treatment
  • Mining and Mineral Processing
  • Power Generation
  • Industrial Fluid Handling
  • General Manufacturing

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