pressure reducing valve Pressure Regulation Operating Instructions:In order to correctly adjust the pressure reducing valve to ensure stable and safe system water pressure, the following are the detailed steps for pressure adjustment:
Preparation stage: First, close the gate valve in front of the pressure reducing valve to cut off the water source. Next, open the gate valve after the pressure reducing valve to create a low-pressure environment downstream for subsequent pressure regulation operations.
Initial Adjustment: Turn the adjustment screw on the pressure reducing valve counterclockwise to the uppermost position, which typically represents the relatively lowest outlet pressure. Once this has been done, close the gate valve behind the pressure reducing valve again to ensure that no water flows out during the adjustment process.
Turning on the water: Slowly and completely open the gate valve in front of the pressure reducing valve to allow water to flow smoothly through the pressure reducing valve.
PRECISE PRESSURE ADJUSTMENT: Now, slowly turn the adjustment screw clockwise while watching the pressure gauge behind the pressure reducing valve. Adjust the outlet pressure to the desired value as required. As soon as a satisfactory pressure setting has been reached, lock the nut on the adjusting screw to prevent it from loosening. Finally, open the gate valve behind the pressure reducing valve again and allow the system to return to normal operation.
RE-ADJUSTMENT: If during the adjustment process it is found that the outlet pressure is higher than the setting, do not rush to adjust other components. The entire pressure adjustment process should be redone from the first step. Remember, the adjustment of pressure reducing valve should follow the principle of gradual adjustment from low pressure to high pressure.
Important Functions of Pressure Reducing valves
Pressure reducing valves play a vital role in piping systems. It works by creating a localized resistance to the flow of water through the flow path in the valve, thereby reducing the water pressure. This reduction in water pressure is automatically adjusted by the difference between the inlet and outlet water pressures on either side of the membrane or piston connected to the valve flap.
Fixed ratio pressure reduction is a special function of the pressure reducing valve, which utilizes the floating piston water pressure ratio in the valve body to control the pressure reduction ratio between the inlet and outlet side. This ratio is inversely proportional to the area ratio of the piston on the inlet and outlet sides. Not only does this type of pressure reducing valve work smoothly and without vibration, but there is no spring in the valve body, so there is no need to worry about failure due to spring corrosion or metal fatigue.
The pressure reducing valve has good sealing performance and can effectively prevent leakage. It reduces both dynamic pressure (i.e., the pressure when water flows) and static pressure (i.e., the pressure when the flow rate is zero). Particularly noteworthy is the fact that the pressure reducing valve does not affect the water flow while reducing the pressure, ensuring the normal operation of the system.
Although there is some head loss when water flows through a pressure reducing valve, the loss is worth it. This is because the pressure reducing valve reduces water waste and makes the system flow distribution more reasonable, thus improving the system layout and working conditions. On the whole, the use of pressure reducing valves is still energy efficient.
When selecting a pressure reducing valve, if the medium is steam, it is recommended to use a pilot operated piston type pressure reducing valve or a pilot operated bellows type pressure reducing valve. For ease of operation, adjustment and maintenance, pressure reducing valves should normally be installed on horizontal piping.
By following the above steps for regulating pressure and understanding the operating principles and functions of pressure reducing valves, you can ensure that your piping system’s water pressure is stable, safe and efficient.
Pressure Reducing Valve Pressure Regulation Operating Instructions
