Koss Industrial, Inc. sells the Type E Main Valve, which is a pressure reducing valve. The Type E Main Valve is a self operated, external pilot type, single seated, metal diaphragm actuated, normally closed designed valve. The internal parts of the valve consists of the seats, discs, stems & diaphragms, which are constructed of stainless steel. There are no springs in the steam space and there is no stuffing box. A major bonus of this valve is that the Type E Main Valve is easily maintained. All of the valves parts are accessible without the valve needing to be removed from the line. Pictured here is the Type E Main Valve with a D Pilot mounted on to it in order to regulate pressure.
Koss Industrial, Inc. offers a wide selection of pressure reducing valves. One line of reducing valves that can be found through Koss Industrial, Inc. at StainlessSteelThings.com are the spence valves. The spence reducing valves, the Type E Main Valves, are generally used in fluid, gas, and vapor applications. This valve is normally closed with a single seat, and has balanced metal diaphragms with a protected spring. The Type E Main valve is virtually frictionless and has a easy in-line maintenance to help maintain a long service life.