MSI Pressure Relief Valves

Sizes 2’’, 3’’
Type STD/H2S
Connections Weco Unions Fig. 1502
Design Seat, Ball, Spring

The pressure relief valve body is forged. The relief is created by a conical seat/ball/spring assembly. The spring effect is generated using a pile of conical spring washers. The relief pressure is adjusted by compressing the pile of spring washers with the hexagonal nut on top of the valve.

The reset effect is automatic. This type of pressure relief valve is commonly called “Pop Off” valve.