The function of a pressure reducing valve is to rely on sensitive components such as diaphragms, springs, etc. to change the position of the valve disc, reduce the pressure of the medium, and achieve the purpose of pressure reduction.
Pressure reducing valves are different from throttle valves. Although they both use the throttling effect to reduce pressure, the outlet pressure of throttle valves varies with changes in inlet pressure and flow rate. But the pressure reducing valve can automatically adjust to maintain stable pressure behind the valve.
1. Classification of pressure reducing valves
(1) Classify direct action and pilot action according to their mode of action.
(2) Classify membrane pressure reducing valves according to their structural form; Spring film pressure reducing valve; Piston type pressure reducing valve; Bellows type pressure reducing valve; Leverage type pressure reducing valve.
2. Selection of pressure reducing valve
When selecting a pressure reducing valve, in addition to considering its nominal diameter, nominal pressure, and operating temperature, the outlet pressure range of the valve should also be taken into account. At the same time, the static characteristic deviation and insensitivity deviation of the selected pressure reducing valve should be considered. If high sensitivity is required, a spring film pressure reducing valve can be selected. If the medium temperature is high, a piston pressure reducing valve should be selected.
3. Arrangement of pressure reducing valves
(1) Pressure reducing valves should not be placed near rotating equipment or in places that are susceptible to impact, and should be considered for ease of maintenance.
(2) Pressure reducing valves should be installed on horizontal pipelines.
(3) To avoid impurities in the pipeline causing wear on the pressure reducing valve, a filter should be installed before the pressure reducing valve.
(4) The outlet pipeline of the pressure reducing valve should be equipped with reliable supports to avoid vibration damage to the pipeline during the pressure reduction process.
Linhai Dahua Instrument Co., Ltd. specializes in producing various specifications of gas cylinder pipeline pressure reducers, pressure reducing valves, oxygen pressure reducers, natural gas pressure reducers, ammonia pressure reducers, propane, acetylene, nitrogen, hydrogen, air, carbon dioxide, argon, liquefied petroleum gas, pressure gauges, etc