0372271 530C-STD 3/4" x 1/2" Poppet Type Calibrated Pressure Relief Valve

Key features

• Premium Brass Model 530C Series 0372271 Our adjustable pressure relief valve adopts high-quality lead-free brass integral casting body, however not suitable for potable Water, corresponding to model 530C-STD with 3/4"MNPT inlet and 1/2" FNPT side outlet. The poppet-type internal structure is equipped with reinforced stainless steel spring and Buna-N sealing gasket, which delivers tight sealing performance without leakage under rated pressure. Clear scale marking on the top adjusting knob allows you to quickly read and set pressure values visually
• Fully Adjustable Pressure Relief Function This brass poppet pressure valve features fully adjustable pressure range from 100 psi to 300 psi, you can rotate the top calibrated knob clockwise to raise the relief pressure or counterclockwise to lower it to match your system’s safety requirement. Once the internal pressure exceeds your preset value, the poppet will automatically lift to discharge extra fluid or gas, stabilizing pipeline pressure in real time. It acts as a critical safety protection device to prevent pipe, water heater, air tank and hydraulic equipment from bursting or deformation caused by overpressure and thermal expansion pressure spikes
• Multi-Media Compatibility for Water Oil Air Fluid Systems The 530C adjustable poppet pressure relief valve supports three mainstream working mediums: water, mineral hydraulic oil and compressed air, widely applicable to both household and light industrial equipment. For water systems: closed heating loop, water heater, booster pump and cooling circulation pipeline; for air systems: small air compressor, air storage tank and pneumatic tool pipelines; for oil systems: miniature hydraulic station, machine lubrication equipment and fluid pressure test benches. The durable sealing component resists medium erosion and maintains long-term stable operation without frequent replacement
• Standard NPT Thread DesignDesigned with standard American NPT tapered thread, 3/4"male thread inlet connects to the main system pipeline, 1/2" female thread outlet for exhaust/drain piping. The arrow mark on the brass body clearly indicates fluid flow direction, the valve must be vertically installed to guarantee normal poppet opening and closing. No complex auxiliary parts required during installation; you only need to connect the outlet to a safe drainage or exhaust area without any valves blocked on the discharge pipeline. The detachable top adjustment cap allows convenient pressure recalibration and daily maintenance without dismounting the whole valve from the pipeline
• Reliable Overpressure Safety GuardOur 3/4" brass adjustable poppet pressure safety valve serves as secondary overpressure protection for all pressure-bearing equipment, effectively solving common system risks such as water hammer impact, thermal expansion pressure and pressure switch failure. It replaces old uncalibrated fixed-pressure relief valves, offering flexible pressure setting for different working conditions. Suitable for domestic water heating systems, light industry air compressors, small hydraulic machinery, commercial cleaning machines and circulating water treatment equipment, durable brass structure ensures long service life under continuous cyclic pressure work
• 1-Year Warranty & Responsive After-Sales Support We offer a full 1-year warranty for this 3/4" 530C brass adjustable poppet pressure relief valve. Not be used with drinking water, If you encounter any product issues during use, feel free to contact our customer service team at any time, we will provide professional solutions to solve your problems quickly

Free shipping included. 30-day hassle-free returns.