UPVC Union Type Back Pressure Safety Valve, Plastic Spring Acid & Alkali Resistant Back Pressure Relief Valve For Metering Pump Pipeline

UPVC union back pressure safety valve adopts UPVC engineering plastic body with built-in spring, connected by union fittings at both ends for easy disassembly and installation. It can maintain back pressure and release overpressure, prevent siphon of metering pump pipeline and stabilize outlet pressure. When pipeline pressure exceeds set pressure, it will automatically open for pressure relief to protect pump and pipeline. Resistant to strong acid and alkali, suitable for highly corrosive chemical dosing system. The set pressure can be adjusted on site at the top.