WV4 series low-pressure pneumatic diaphragm valve, EP grade.

▶ Metal to metal sealing provides leak free service in the vacuum to high pressure range ▶ Small internal volume, capable of completely purging the flow channel ▶ Fully enclosed valve seat design, with superior anti expansion and anti pollution capabilities ▶ Nickel cobalt alloy membrane, with higher durability and corrosion resistance ▶ The standard roughness is Ra0.25 μ m (BA grade), or electrolytic polishing Ra0.13 μ m (EP grade) is optional ▶ Helium gas test leakage rate ＜ 1 × 10-9 std cm3/s ▶ Pneumatic actuators are available for selection ▶ The lifespan of pneumatic valves can reach 3 million cycles