We know that the pressure reducing valve can be divided into liquid pressure reducing valve and gas pressure reducing valve according to the flow medium. Most of the pressure reducing valves are gas pressure reducing valves. The answer to whether the gas pressure reducing valve can be used for liquids is partially yes, but the service life is not very long. The following will analyze the liquid pressure reducing valve from several aspects. The difference with ordinary pressure reducing valve.

The obvious difference between the two is that there is no pressure self-discharge function for the liquid-passing one, while the gas-passing pressure reducing valve does. The general gas pressure reducing valve with pressure self-discharge function, its discharge port is directly discharged to the atmosphere, if such a design is also used when the liquid is overflowing, it will pollute the workplace. Generally, when the pressure reducing valve is used for gas, there is a filter at the inlet end to filter to prevent impurities in the gas from causing damage to the valve trim, but when it is used for liquid, the filter cannot be used.

This design mainly considers that the liquid will cause a greater impact on the valve seat, so when the ordinary pressure reducing valve is used as a liquid pressure reducing valve, it will often cause a shorter service life.

In addition, the internal flow passage of the liquid pressure reducing valve also has a special design, which can prevent the impact of water hammer on the valve trim. There are also many models of pressure reducing valves that can be used for liquid pressure reduction. The more commonly used ones are brass pressure reducing valves with relatively large flow rates. Stainless steel pressure reducing valves can be used for corrosive liquids. When installing in batches on mechanical equipment, considering the cost factor, plastic liquid pressure reducing valves, etc. can be used.

Generally speaking, the difference between liquid pressure reducing valve and gas pressure reducing valve is still relatively large. Users should try to make the best use of everything when purchasing, so as to avoid unnecessary economic losses.