High Vacuum Diaphragm Valves (Manual): Overview & Technical Parameters

The High Vacuum Diaphragm Valve uses the valve stem to directly press the rubber diaphragm onto the valve seat, which is used to cut off or connect the vacuum system. The connection forms adopted include loose flange connection, quick-disconnect flange connection and welded connection. The welded connection is further divided into welded Type I connection (i.e., welding at both ends) and welded Type II connection (i.e., welding at one end and inserting at the other end).

The applicable working media of the High Vacuum Diaphragm Valve are air and non-corrosive gases.

Technical Parameters of Manual High Vacuum Diaphragm Valve

• Nominal Diameter: DN10-DN50

• Applicable Range (Pa): 10⁵~1.3×10⁻⁴

• Valve Leak Rate (Pa·L/S): ≤1.3×10⁻⁴

• Applicable Temperature: -25℃~80℃ (Nitrile Rubber, NBR); -30℃~150℃ (Fluororubber, FKM)

• Valve Body Material: Stainless Steel

• Installation Position: Arbitrary