Extra high capacity for industrial, commercial and residential low pressure steam heating boilers.

Cast iron body with bronze nozzle, disc and guide.

Large seat area/guide area ratio and disc pivot design ensures excellent performance.

Seats are lapped for tight shut-off.

Reversible lift lever for ‘pull-up’ or ‘pull-down’ manual testing.

All adjustments factory sealed to prevent tampering or disassembly.

Tested and inspected for pressure setting and leakage.