Type : Float
Pressure : ANSI 125, 250
Size : 1" ~ 4"
Connection : Screw / NPT, Flange ANSI 125 & 250
Body : Cast Iron
Trims : Buna-N / PVC
Crispin PL series Air Release Valve release Air under pressure. It is installed in highest point where trapped air collects.
https://crispinvalve.com/air-release-valves/air-release-valves/pressure-air-release/pl-series/