... no leakage,no clogging 4.No pressure loss Types Of Pneumatic Valves, Pneumatic Knife Gate Valve Product advantages1 ... standards. Gate valves are typically constructed from cast iron, ductile iron, cast carbon steel, gun metal, stainless steel, ... -Φ181805469065601851451124-Φ1820056510080642001601268-Φ18220580110100642201801508-Φ18240610120125702502101788-Φ18270640135 Types Of Pneumatic Valves