Spring-Loaded Full-Lift Steam Safety Relief Valve

About this part

High-capacity single flanged spring-loaded safety relief valve for industrial steam boiler drums, superheater headers, and pressure vessels. Features may include an open bonnet, manual test lever, and precision-lapped Stellite or stainless-steel trim; set pressure, capacity, and certification must be confirmed for the exact model.

Key features

• Full-lift rapid discharge design maximizing steam mass flow during overpressure events
• Open bonnet configuration allowing ambient cooling of spring during high-temp steam duty
• Heavy-duty manual testing lever for statutory daily and weekly safety checks
• Precision ground stainless steel disc and full nozzle construction
• Calibrated tamper-proof bonnet cap with lead seal protection

Typical applications and wear

Steam boiler shells, header take-offs, and process accumulators. Wear involves spring relaxation, seat pitting, and thermal cycling leakage.

Compliance

Available for applications designed around ASME Section I, ISO 4126, and local boiler-inspector requirements; final certification depends on the exact valve and installation.