The offered Pressure Reducing Valves are made for a long and durable service life in the various commercial and industrial applications. The offered Valves are designed to reduce incoming water or steam pressure to a safer constant predetermined downstream level. Depending on the type of valve, the downstream pressure is established by a pressure adjustment setting on the valve or by an external sensor. The offered is an apparatus that controls the flow of a liquid or gas and automatically discontinues the flow once a certain pressure level is attained. The Pressure Reducing Valves are very safe and efficient.