• 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 optimum performance
• Seats are lapped for optimum performance
• 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
• Stainless steel set screw, snap ring, bronze nozzle, step spring, compression screw guide, lift washer, steel spring, lever, washer, aluminum gag bracket, nylon retaining washer, phenolic threaded knob

Standards/Certifications: ASME section IV, HV and NB certified

Applications: For industrial, commercial and residential low pressure steam heating boilers