Diaphragm Valve

Industrial / General Purpose Valve

Diaphragm valve is an isolation valve. The sealing element is a resilient diaphragm, sitting on the valve body. The body may be either metallic, plastic or lined, thus enabling users to design what is best suited for the application.   

The resilient diaphragm provides a seal between the body and the bonnet. Diaphragm valves may be manually operated by a hand wheel or automated by pneumatic.


  1. Inline maintenance – diaphragm and operator can be replaced without dis-assembling the body from the pipeline. Regular diaphragm inspection, and replacement, when necessary, will increase valve life.
  2. Bonnet isolation – all bonnet components are isolated from the service fluid by means of the diaphragm.
  3. No packings/gaskets are required, thus eliminating a common leak path found in other design valves.
  4. Resilient diaphragms ensure positive leak tight closure.
  5. Design flexibility – wide range of diaphragms, linings and operators offering scope to maximize valve life.
  6. Over closure protection – lowers cost of owning our diaphragm valves by reducing the possibility of over closure, which decreases diaphragm and valve body life.
  7. “W” Diaphragm valves are especially suitable for vacuum services (with vacuum – type diaphragms) 
  8. The valves are self-draining and self-cleaning when installed at a certain angle on the horizontal plane.

Type: Weir / Straight

Operation: Automatic.

Valve Sizes: 15MM to 300MM (Flanged ends) 15mm to 100mm (Screwed ends)

Valve Rating – PN10 /PN16

Valve Manufacturing Standards – Internal VENUS.

Lining Options: Natural Rubber, Ebonite, Neoprene, Nitrile, Butyl, Hypalon, Silicon, F.R.P and LEAD.

Diaphragm: Natural Rubber, Neoprene, Nitrile, Butyl, Viton, Silicon, Hypalon, EPDM and PTFE. The diaphragms are reinforced with canvas/nylon/rayon-cord.