Teledyne Farris WL23-1 Pressure Relief Valve

The Teledyne Farris WL23-1 Pressure Relief Valve (1890L series) is a 1/2 in MNPT inlet and 1 in FNPT outlet, spring-loaded liquid-relief device designed to protect pressurized liquid systems from overpressure by venting excess pressure at 115 PSIG. It supports a maximum series rating up to 800 PSIG and is intended for liquid service in pumps, pressure vessels, process piping, hydraulic systems, chemical processing equipment, water treatment facilities, and other industrial liquid applications requiring ASME-certified overpressure protection. The valve uses a Type 316 stainless steel body with stainless steel trim and a carbon steel bonnet, with threaded NPT connections for robust industrial use, and is ASME Section VIII, NB certified for pressure relief service; operating temperatures range from -20°F to +750°F, depending on spring selection. Maintenance technicians and system integrators use this relief valve for repair, retrofit, replacement, and preventive maintenance of industrial process and safety systems, and common replacements include TELEDYNE FARRIS 1890L2-M20, 1890L3-M20, and 1892L2-M20.