The Cla-Val Model 100-34 Hytrol Valve is used as the basic unit in almost all Cla-Val automatic control valves for petroleum applications. The 100-34 is a hydraulically-operated, diaphragm actuated, globe or angle pattern valve. It is available in various materials and a 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 of the dependable, trouble-free operation. Should the diaphragm become damaged the valve will close tight, providing a “fail-safe” operation.