Valve apparatus

摘要

Valve apparatus including a generally cylindrical valve body member and at least one pilot valve located at the end of the valve body member. A supply valve is located within the valve body member and the supply valve and the pilot valve permit the non-throttling interruption of fluid flow as well as permitting the fluid flow pressure to maintain the supply valve in a positive or locked position. The non-throttling and locked operational features are made possible by the relationships of various areas upon which pressures are exerted and the supply pressure. Various embodiments of the invention are presented and these embodiments have convertible components which permit them to be converted into various types of operational configurations.