Spring-Loaded Flanged Safety Relief Valves with Test Levers

About this part

These spring-loaded flanged safety relief valves are available for overpressure protection of steam boilers, pressure vessels, and piping headers. Manual test lifting levers and calibrated stainless/alloy springs support routine testing and reliable pressure relief; code compliance, set pressure, capacity, and certification must be confirmed for the exact model and installation.

Key features

• Full-lift popping action for maximum instantaneous steam discharge capacity
• High-precision calibrated spring in open or enclosed bonnet configuration
• Manual testing lifting lever for routine maintenance and safety compliance inspections
• Precision ground and lapped stainless steel disc and nozzle seating surfaces
• Flanged process connections conforming to ANSI Class 150/300/600 and DIN PN16/25/40

Typical applications and wear

Steam boiler shells, superheaters, economizer headers, and pressure reduction stations. Wear results from spring relaxation, seat pitting, and thermal cycling.

Compliance

Use as part of a documented boiler or pressure-vessel protection system; final selection and certification must match the applicable code and local boiler-inspector requirements.