Superior Hvacr 3020-450 Brass Pressure Relief Valve 450 Psig

Product Description

The SUPERIOR HVACR 3020-450 is a brass refrigeration pressure relief valve designed to protect refrigerant circuits from dangerous overpressure conditions. Built in a straight-through configuration, it opens at a factory-set pressure of 450 PSIG and features a Teflon seat for reliable, leak-resistant seating across repeated cycles. The valve connects via a 1/2 inch male flare inlet and a 5/8 inch male NPT outlet, making it a direct-fit solution for standard refrigeration and air conditioning system piping. Licensed HVACR technicians install this valve as a safety device on receivers, condensing units, and refrigerant vessels where code-required overpressure protection is mandated.

This relief valve is suited for use in commercial and light commercial refrigeration systems, split-system air conditioning equipment, and refrigerant storage vessels. The straight-through flow path minimizes pressure drop across the valve body during a relief event. The male flare inlet and male NPT outlet allow connection to copper line sets and steel or brass pipe fittings commonly found in mechanical equipment rooms and rooftop units. Installation is typically performed by a certified HVACR technician as part of new equipment commissioning or component replacement during a service call.

Key Features

• Factory-set relief pressure of 450 PSIG for consistent, predictable overpressure protection
• Straight-through valve design for low-restriction flow during a relief event
• Teflon seat provides a durable, leak-resistant seal under normal operating conditions
• Brass body construction for compatibility with common refrigerants and system fluids
• 1/2 inch male flare x 5/8 inch male NPT connection for standard refrigeration piping hookup

Compatibility

Designed as an OEM-style replacement or new-installation pressure relief valve for refrigeration and air conditioning systems requiring a 450 PSIG set-point relief device with 1/2 inch male flare x 5/8 inch male NPT connections.

Installation Notes

Installation must be performed by a licensed HVACR technician in accordance with ASHRAE 15 and applicable local mechanical codes governing refrigerant system safety relief devices. Recover all refrigerant and verify system pressure is at zero before removing an existing relief valve or making any piping connections. Do not cap, plug, or obstruct the valve outlet, and ensure the discharge is routed per code requirements. Apply an appropriate thread sealant to the NPT threads only; never apply sealant to the flare fitting.

Technical Specifications

• Set Pressure: 450 PSIG
• Valve Type: Straight Through Pressure Relief Valve
• Body Material: Brass
• Seat Material: Teflon
• Inlet Connection: 1/2 inch Male Flare
• Outlet Connection: 5/8 inch Male NPT
• Weight: 1 pound

Standard Information

• Brand: SUPERIOR HVACR
• Manufacturer Part Number: 3020-450