Safety Relief Valve Afriso 42390, 1/2" x 3/4" female threaded connection

Afriso safety relief valve model 42390 with 1/2" x 3/4" female threaded connection is a compact device designed to protect pressurized systems by discharging excess pressure when preset limits are exceeded. The valve is intended for use in heating and plumbing installations as well as small industrial systems where a reliable threaded safety valve is required to prevent overpressure and preserve system integrity. Its compact threaded design allows straightforward integration into piping layouts and maintenance-friendly replacement when necessary.

Advantages

The safety relief valve offers dependable pressure relief with a simple mechanical operation that does not require external power. Its female threaded connections provide straightforward installation into standard pipe fittings, and the compact form factor makes it suitable for confined spaces. The valve construction is tailored for repeated actuation and reliable reseating after discharge events, supporting system safety and continuity of operation.

Suitable for

• Domestic and commercial heating systems
• Plumbing installations and water supply circuits
• Small compressed-air or low-pressure industrial systems
• Boilers, water heaters and closed-loop circuits that require overpressure protection

Key specifications

• Connection type: female threaded connections sized 1/2" x 3/4"
• Function: mechanical overpressure relief via spring-loaded valve
• Application environment: heating, plumbing and small industrial systems
• Installation orientation: inline threaded fitting into piping
• Design: compact body suitable for limited-space installations

How to use

Install the safety relief valve in the designated pressure line using compatible threaded fittings and appropriate sealing material on the threads to ensure leak-free connection. Ensure correct orientation and accessibility for inspection and discharge outlet routing. Set or verify the factory-set opening pressure according to system requirements and applicable standards before commissioning. Periodically inspect the valve for signs of corrosion, blockage or leakage and test operation by following local maintenance procedures to confirm the valve opens and reseats correctly.

Usage recommendations

Use the valve within the pressure and temperature limits specified by the system design. Avoid using lubricants or sealants that are incompatible with valve materials. Replace the valve if it shows persistent leakage, mechanical damage, or fails functional tests. For safe operation, follow applicable regulations and standards for pressure equipment and consult qualified technicians for installation and maintenance.