New CARRIER 5H120 Relief Valve

NEW Replacement Pressure Relief Valve for CARRIER 5H120 Compressors

This New quality relief valve replacement for Carrier 5H120 reciprocating compressors will keep your heavy duty refrigeration systems running smoothly and safely. This safety valve is designed to fulfil demanding industry and maritime specs and will protect your 12 cylinder, large capacity compressor from hazardous overpressure scenarios.

It’s important to keep pressure specifications spot on, whether it’s a commercial cargo ship or an industrial HVAC plant onshore. This precision-machined valve is made of rust-resistant alloy components, ensuring an immediate mechanical venting response as soon as system restrictions are breached. It is a direct drop-in replacement and guarantees a leak-free seal and reliable performance under extreme heat and mechanical stress.

Model Details:

Compatible Compressor Model: CARRIER / CARLYLE 5H120 (12-Cylinder Reciprocating Open/Semi-Hermetic Types)

Manufacturer Part Numbers (MPN): 5H120-337 / 5H120782 / EB51FH270 (Series Equivalent)

Condition: Brand New, Unused Surplus Stock

Technical Data:

Applications

1. Marine Provision & Cargo Refrigeration: This is a critical safety aspect for the multi-cylinder cargo hold cooling loops and on-board A/C systems.
2. Industrial Chillers & HVAC Systems Used in heavy duty commercial HVAC systems with older or newer 5H open style reciprocating equipment.
3. Cold Storage Logistics For backup and main compressor loops in large food preservation warehouses and processing facilities.
4. Refinery & Chemical Process Cooling: Suited for low to medium temperature condensation systems with heavy duty industrial workloads.

Installation Guide:

1. Never Reuse Old Gaskets: When installing this new valve, always replace the surrounding head and valve body gaskets. A minor gasket leak under high pressure will quickly wire-draw the metal, ruining the seal surface.
2. Verify Seating Before Reassembly: If you are chasing an elusive “low volumetric efficiency” issue where the compressor runs constantly but struggles to hold a vacuum, check if the old relief valve is unseated or scaled. Replacing it with this new unit often completely restores original factory pumping capacity.
3. Torque Sequence Matters: When securing the valve assembly or the cylinder head plate covering it, always use a cross-pattern torque sequence to manufacturer specifications. Uneven torque can warp the seat or cause micro-gaps.