Valve is an automatic pressure reduction on line dedicated pressure relief device is adjusted by changing the cutting area, the inlet pressure was reduced to a desired outlet pressure, and rely on the energy of the medium itself, the outlet pressure automatic stable valves.

Valve is widely used in high-rise buildings, urban water supply network pressure is too high area, mine and other occasions to ensure that the water supply system in each point of access to adequate water pressure and flow service. The dropout rate in view of the water and waste water systems is almost the same size is proportional to the pressure, so the valve can improve system operating conditions and potential water-saving effect, according to statistics about 30% of its water-saving effect.

DN15 ~ DN100 valve usually has a variety of specifications, valves before and after the work pressure was <1MPa and 0.1 ~ 0.5MPa, pressure range error of ± 5% ~ 10%. Common are thin film, the inner spring piston and so on.Valve performance standards to JB/T2203-1999 "valve structure length" based.

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