Principle, Function, and Pressure Regulation of Brass Pressure Reducing Valve

Brief Introduction to the Brass Pressure Reducing Valve

A brass pressure reducing valve is a device that automatically reduces the working pressure of a pipeline and is generally used in water systems. It can reduce the higher water pressure in the pipeline before the valve to the required level in the pipeline after the valve. Brass pressure reducing valves are widely used in high-rise buildings, areas with excessively high water pressure in urban water supply networks, mines, and other locations.

Functions of the Brass Pressure Reducing Valve

In water systems, the network pressure is usually high or unstable. Excessively high pressure can cause pipe noise, pipe corrosion, and even damage to water equipment. Conversely, too low pressure may result in reduced flow, which cannot meet usage demands. Therefore, in tap water systems, industrial water systems, and industrial complete equipment, brass pressure reducing valves are often used to reduce and stabilize water pressure. This ensures that the water pressure in each location remains stable at the set value, and it can even adjust the outlet pressure according to individual needs.

Working Principle of the Brass Pressure Reducing Valve

The brass pressure reducing valve can adjust the inlet pressure of the valve to a required outlet pressure and rely on the energy of the medium itself to automatically maintain a stable outlet pressure.

The brass pressure reducing valve is a throttling element where partial resistance can change. By changing the throttling area, it alters the flow speed and the kinetic energy of the fluid, causing different pressure losses to achieve the purpose of pressure reduction. Then, relying on the adjustment of the control system, it balances the fluctuation of the post-valve pressure with the spring force, ensuring that the post-valve pressure remains constant within a certain error range.

If the inlet pressure of the brass pressure reducing valve is less than the set value, the valve can no longer serve the purpose of pressure reduction, and the medium in the pipeline flows directly through it. It can be simply understood that the set pressure of the pressure reducing valve refers to the outlet pressure of the valve because the control pressure of the pressure reducing valve is derived from the outlet.

Pressure Adjustment Steps for the Brass Pressure Reducing Valve

• First, close the valve in front of the pressure reducing valve to cut off the inlet pressure;

• Unscrew the adjustment bolt to the end, making the post-valve pressure relatively lower;

• Open the relief valve after the pressure reducing valve to drop the post-valve pressure below the set value, then close the relief valve;

• Slowly open the water supply valve in front of the pressure reducing valve;

• Tighten the adjustment bolt to gradually increase the post-valve pressure until it reaches the set value.