Pressure reducing valves can be classified by structural form into diaphragm, spring diaphragm, piston, lever, and bellows types; by the number of valve seats into single seat and double seat types; and by the position of the valve disc into direct acting and reverse acting types. Their primary function is to control the pressure and flow rate of fluids within a system and are widely used in high-rise buildings, areas with high water pressure in urban water supply networks, etc., to improve system operating conditions and potentially save water, as well as to reduce pipeline pressure fluctuations and prevent water hammer.
Specifications:
Pressure class: Commonly available are PN64~PN420 (CLASS 300~2500) and others.
Operating temperature: Generally, they can operate within a temperature range of -29℃~648℃.
Valve size: Nominal diameters range from DN20~400 (NPS 3/4~16).
Materials:
Valve body material: Typically includes carbon steel, stainless steel (304, 304L, 316, 316L, etc.), alloy steel, ductile iron, etc.
Valve core material: Mostly stainless steel (304, 304L, 316, 316L, etc.).
Valve seat material: Generally, stainless steel (304, 304L, 316, 316L, etc.) is used.
Valve stem material: Commonly stainless steel (304, 304L, 316, 316L, etc.).
