
A pressure-reducing valve (PRV) is a type of valve that regulates the pressure coming from a water supply line. It works by allowing only a certain amount of water to pass through, which helps maintain an even flow rate and keeps the water pressure in check. The PRV also helps protect your pipes from becoming over-pressurized, which can lead to costly repairs or disastrous flooding.
Pressure-reducing valves are essential components of any plumbing system. They are used to control the water pressure in your home or business, ensuring that it remains safe and efficient.


A pressure-reducing valve has a number of advantages, including:
Improved safety
By keeping the pressure within a certain range, you reduce the risk of equipment failure due to excessive pressure. This also helps reduce any risks associated with high-pressure systems, such as explosions and fires.
Reduced energy costs
A well-sized pressure-reducing valve can help reduce energy costs by ensuring that your system is operating at its optimal efficiency. This reduces wear and tear on your equipment and helps ensure that it lasts longer.
Improved performance
Pressure-reducing valves also help keep your system running smoothly by ensuring that all components are being supplied with the necessary amount of pressure. This ensures optimal performance and reduces any potential issues caused by inconsistent pressure levels.
Pressure-reducing valves (PRVs) are used to regulate the pressure in a system.
- PRVs can help to improve the efficiency of a system by ensuring that the pressure is maintained at a constant level.
- PRVs can also help to protect equipment from damage that can occur when the pressure in a system is too high.
- PRVs can also help to reduce noise levels in a system by absorbing excess pressure.
- PRVs are available in a variety of sizes and configurations, so they can be customized to meet the needs of any system.

Installed directly after the water meter in homes, commercial buildings, and manufacturing plants, a water pressure reducing valve automatically reduces the pressure from the water supply main to a lower, more sensible pressure.
There are two types of water pressure reducing valves-- direct acting and pilot operated-- which use globe or angle style bodies. Direct acting valves are the more popular water pressure reducing valves, consisting of globe-type bodies with a spring-loaded, heat-resistant diaphragm connected to the outlet of the valve that acts upon a spring. This spring holds a pre-set tension on the valve seat installed with a pressure equalizing mechanism for precise water pressure control.


Pressure-reducing valves can be used for both residential and commercial applications. In residential settings, they are typically installed on water supply lines near the main shutoff valve to help regulate the water pressure throughout the house. This ensures that all fixtures have an adequate flow rate without having to worry about excessive pressure buildup. In commercial settings, PRVs are often used to regulate pressures in large systems such as fire sprinkler systems or industrial equipment lines.

Item | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | Parts | Material | |
Resistance pressure (MPa) | 2.5 | ||||||||||||||
Shell test pressure (MPa) | 3.75 | Body | WCB | ||||||||||||
Seal test pressure (MPa) | 2.5 | Cover | WCB | ||||||||||||
Max. inlet pressrure (MPa) | 1.6 | Seat | 2Cr13 | ||||||||||||
Outlet pressure range (MPa) | 0.05~0.3(yellow spring) 0.25~0.7(blue spring) 0.6~1.2(red spring) | Valve clack | 2Cr13 | ||||||||||||
Pressure characteristics derivation (MPa) | GB 12244 | Pole | 2Cr13 | ||||||||||||
Flow characteristics derivation (MPa) | GB 12244 | Diaphragm | 1Cr18Ni9Ti | ||||||||||||
Leakage (ml/min) | GB 12245 | Adjusting spring | 60Si2Mn | ||||||||||||
Medium temp. (ºC) | -10~285 | ||||||||||||||
Kv. | 2.8 | 5.5 | 8.1 | 12 | 17 | 28 | 45.5 | 60.1 | 93.3 | 146 | 180 | 300 |















