Pressure relief valve principle

When the pressure in the pipeline is greater than the set pressure of the pressure relief valve, the oil will flow out of the pressure relief valve, thereby controlling the pressure in the pipeline not to exceed a certain limit value. The needle pressure relief valve adjusts the pressing force by adjusting the length of the spring force in the valve. When the pressure in the pipeline is higher than the set value, the spring is compressed in the opposite direction, so that the sealing thimble opens and the oil leaks out. It plays the role of protecting equipment and regulating system pressure.

Utilizing hydraulic automatic operation, it can be used as both a pressure relief valve and a pressure maintaining valve. When used as a pressure relief valve, it can maintain the water supply line pressure below the set safety value; when used as a pressure maintaining valve, it can maintain the water pressure upstream of the main valve above the set value and maintain the water supply pressure upstream of the main valve.

The pressure relief valve uses hydraulic self-control and does not require other devices and energy. It is easy to maintain and has multiple uses.

This series of valve products are widely used in water supply pipe network systems such as high-rise buildings and living areas, as well as urban water supply projects.