The Cla-Val Model 50-48 Back Pressure and Check Valve is a hydraulically-operated, diaphragm actuated, globe or angle pattern valve. It is available in various materials and full range of sizes. It consists of three major components: body, diaphragm assembly and cover. The diaphragm assembly is the only moving part. The rugged simplicity of design and packless construction assure a long life dependable, trouble-free operation. Should the diaphragm become damaged the valve will fully open. 

The 50-48 Back Pressure and Check Valve is used in many types of piping systems requiring back pressure and relief operations.