Safety Valves &
Refrigeration Components
The broadest safety relief valve product line in the industry — 100% American-made since 1912. Precision-machined in Williamsport, PA and individually bench-tested before every shipment.
ASME Section VIII — individually tested, UV stamped since 1912
Safety Relief Valves
The industry standard for refrigerant system overpressure protection. Every valve is precision-machined in Williamsport, PA, individually bench-tested, and UV stamped to ASME Section VIII. Available in single-piece, two-piece Quick Release cartridge, and Green Line aluminum configurations. Custom set pressures at no additional charge.
3-way manifolds — highest Cv in industry, tested to 11,500 PSI
Manifolds
3-way changeover manifolds for dual safety relief valve installations per ASHRAE 15 and IIAR 2. Available as Quick Release Manifolds, cast handwheel assemblies, and inline steel models in carbon steel or stainless steel with threaded or weldable connections.
Globe, angle, expansion, and purge valves for NH₃ and halocarbon
Hand Valves
Comprehensive line of refrigerant isolation and control valves: globe and angle shut-off, hand expansion, bolted bonnet shut-off, purge valves for non-condensable gas removal, needle point, line valves, and all-steel gauge sets.
Visual discharge indication — know when a valve has opened
Pop Indicators
Visual confirmation when a safety relief valve has discharged. The 8XX-PI is an add-on for any 800/801/803/805 series valve. The PDSV1 and PDSV2 series are standalone pressure differential sensing valves for vent line installation.
ASHRAE 15 and IIAR 2 compliant dual valve assemblies
Dual Assemblies
Two ASME-certified relief valves with a 3-way cast handwheel manifold, satisfying ASHRAE 15 and IIAR 2 requirements. The handwheel allows either valve to be replaced while the system stays pressurized and protected.
Caps, test plugs, and inlet filters for every installation
Accessories
Pop indicator caps, test plugs for system pressure testing, and inlet filters to protect relief valve internals from system contamination. All designed for direct compatibility with Cyrus Shank valve series.