Overview
The Crosby 961101FA is a proven pressure relief valve engineered for ammonia refrigeration systems and other industrial vapor/gas applications. With a compact gage basin design and straightforward direct-acting mechanism, this valve provides dependable overpressure protection in demanding chemical handling environments. The 3/4″ inlet × 1″ outlet configuration fits standard piping layouts, making it a drop-in choice for system replacement or retrofit.
Key Features
- Direct-acting design ensures fast, reliable pressure relief response
- Compact gage basin body suitable for mounting on pressure vessels or skids
- Optimized for ammonia and other vapor-phase refrigerants
- Simple internal trim minimizes maintenance and part complexity
- Standard NPT threaded connections for easy installation
Technical Specifications
- Valve Type: Direct-acting, pilot-to-open relief valve
- Inlet Connection: 3/4″ NPT
- Outlet Connection: 1″ NPT
- Pressure Setting: 60 PSIG
- Service Medium: Ammonia and compatible refrigerants
- Body Material: Ductile iron or cast steel
- Seat Material: Hardened stainless steel trim
- Operating Temperature: −40°F to +185°F (standard refrigeration range)
- Capacity: Flow capacity per ASME/NB certification for ammonia service
- Certifications: ASME Section VIII, NB certified for pressure vessel relief
Typical Applications
- Ammonia refrigeration systems (industrial and commercial)
- Pressure vessel overpressure protection
- Receiver tanks and surge vessels
- Vapor-phase service in closed-loop refrigeration
- OEM equipment integration and system upgrades
Compatibility & Replacements
Compatible With
- Standard ASME-certified ammonia refrigeration piping systems
- Industrial and commercial ammonia chillers
- Pressure vessels rated for ammonia service
- Direct inlet/outlet connection to 3/4″ and 1″ NPT ports
Replaces / Drop-In Replacement For
- Equivalent 60 PSIG direct-acting relief valves with matching 3/4×1″ port configuration
- Original Crosby 961101FA units requiring recertification or upgrade
- Legacy ammonia relief valves with identical ASME nozzle sizing
Works With
- ASME/NB certified pressure relief systems
- Ammonia detection and safety interlock equipment
- Standard industrial pressure gauges and transducers
- Pneumatic or manual pilot-operated blowdown kits (when applicable)
