Diaphragm Valves

Diaphragm Valves are designed and manufactured as per BS 5156. They are widely utilized in water treatment plants, fertilizer & petrochemical industries, pharmaceutical units, chemical process units, refineries and power plants. They are most appropriate for positive pressure and high vacuum conditions. An extensive range of materials are available to handle almost all operations within its pressure-temperature limitations.

Total wet area and working parts are kept from coming in contact with the working media by appropriate lining with different qualities of Rubber; PTFE/PFE etc. to make it certain that it handles extremely corrosive fluids efficiently and safely.

Maintenance of these Valves is extremely simple. By dismantle the Bonnet from the Body, the whole Trim Assembly can be taken out for maintenance while the Body will remain in the Pipeline. Hence the design allows online maintenance to save time and energy. Its linear flow characteristics, makes it perfect for throttling or modulating operations. On/off and control automation is supplied with Pneumatic Actuators or Cylinders.

Diaphragm Valves are supplied in a wide-ranging material like Cast Iron, S.G. Iron, Cast Carbon Steel, and Stainless Steel of all grades, High Alloy Steels like Ally-20, CD4MCu, and Hastelloy etc. Size range starts from 15NB to 250NB and pressure rating range from ASME 125# / 150# / PN.

Diaphragm Valve Electric
Actuator Operator

Diaphragm Valve Manual Operator
with Open-Close Indication

Click image to Zoom


Diaphragm Valve - Technical Specification
Size Range 15 NB through 250 NB
Pressure Rating ASME 125/ 150# / PN10 / PN16 / PN25
Type Screw Down - Fully Rubber Lined / Unlined Body
End Connection Flanged and Threaded
Operation Hand Wheel / Pneumatic Cylinder / Electric Motor Actuator
Port Opening Full
Seat Soft Rubber / PFA / Integral
Disc Equivalent Body Material with Rubber Lining / PTFE Lamination
Gasket & Packing NA
MOC Refer Material Chart
Design Code BS - 5156
Testing API – 598 / BS 6755
Inspection 3rd Party / Client / Manufacturer