Type : High Performance
Pressure Range : ANSI 125 & 250
Size : 3" ~ 36"
Connection : Flange ANSI 125 & 250
Body : Ductile Iron
Disc : Stainless Steel
Seat : Buna-N
Crispin VR series Vacuum Release / Relief Valve is used to let air inside closed Tank upon drainage. This will prevent Vacuum from forming and prevent Storage Tank from collapsing.
https://crispinvalve.com/air-release-valves/air-release-valves/air-release-valves/vr-series/