These diaphragm type hand shut off valves are designed for installations in liquid, suction and hotgas lines of commercial refrigerating systems and on civil and industrial air-conditioning systems.

Diaphragm valves don’t have gland seals. The external sealing is assured by thin metal discs (diaphragms), which hermetically divide the spindle chamber from the fluid flow area.

The main parts of the valves are made with the following materials.
  Hot forged brass body as per BS-218
  Extruded brass for the spindle
  Special spring steel for the spring
  Engineering Plastics for seat sealing gaskets

  Hot forged brass body as per BS-218
  Seat of Engineering Plastics to give complete shut off    with minimum torque
  Fitted with stainless steel diaphragms that prevent    leakage
  Throughout the operating life of the valve