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Small brass relief valve with threaded connections and adjustment mechanism

Watts

Watts 1/2 LF530-C Adjustable Relief Valve Trap 50-175 psi

SKU CH-AVF0-SK1FQ MPN 1/2

Adjustable brass relief valve for air systems, factory set at 150 psi with a 50 to 175 psi range

  • TypeDrain Components
  • Adjustable pressure range from 50 to 175 psi for flexible system protection
  • Factory set at 150 psi for immediate installation readiness
  • Brass body with Buna-N disc and seat resists corrosion in air systems
  • Stainless steel spring maintains consistent performance up to 180 degrees F
  • Buy American Act compliant for regulated project requirements

Adjustable Relief Valve for Air Systems

The Watts 1/2 LF530-C is a calibrated adjustable relief valve designed for air systems. Its brass body with Buna-N disc and seat handles pressures from 50 to 175 psi and temperatures up to 180 degrees F. It comes factory set at 150 psi for immediate installation.

Brass Construction with MNPT and FNPT Connections

The valve features a 1/2 inch MNPT inlet and a 1/2 inch FNPT outlet for direct piping integration. Stainless steel spring internals resist corrosion while the compact 3 inch height and 1 5/8 inch length fit tight mechanical rooms. No test lever is included with this model.

Replaces Fixed or Out-of-Range Valves

This unit upgrades systems where a non-adjustable valve cannot match the required pressure window. The 50 to 175 psi range covers low and medium pressure air lines in one device. It is not suited for steam, hydraulic fluid or applications exceeding 180 degrees F.

Highlights

  • Adjustable pressure range from 50 to 175 psi for flexible system protection
  • Factory set at 150 psi for immediate installation readiness
  • Brass body with Buna-N disc and seat resists corrosion in air systems
  • Stainless steel spring maintains consistent performance up to 180 degrees F
  • Buy American Act compliant for regulated project requirements

Specifications

TypeDrain Components
BrandWatts
Model1/2 LF 530-C STD

Questions about this item

What pressure range does the 1/2 LF530-C adjustable relief valve cover?

The valve is factory set at 150 psi and adjusts from 50 psi up to 175 psi for air systems.

What pipe threads and clearance does the 1/2 LF530-C need to fit?

It uses 1/2 inch MNPT inlet and FNPT outlet threads, with an overall height of 3 inches and length of 1 5/8 inches.

How is the 1/2 LF530-C installed and what step is often missed?

Thread the MNPT inlet into the system and the FNPT outlet to discharge piping; the common error is omitting thread sealant on both connections.

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