Dimensional and structural diagram of ATOS pressure reducing valve

Dimensional and structural diagram of ATOS pressure reducing valve

It can reduce the high liquid pressure in the upstream pipeline to the level required in the downstream pipeline. The main transmission medium here is water. Pressure reducing valves are widely used in high-rise buildings, areas with high water pressure in urban water supply networks, mines, and other occasions to ensure that each water point in the water supply system receives appropriate service water pressure and flow. Given that the leakage rate and degree of water waste are almost proportional to the water pressure in the water supply system, pressure reducing valves have the potential to improve system operating conditions and save water. According to statistics, their water-saving effect is about 30%.

A pressure reducing valve is a valve that adjusts the inlet pressure to a desired outlet pressure, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. From the perspective of fluid mechanics, a pressure reducing valve is a throttling element with variable local resistance. By changing the throttling area, the flow velocity and kinetic energy of the fluid are altered, resulting in different pressure losses and achieving the purpose of pressure reduction. Then, relying on the adjustment of the control and regulation system, the fluctuation of the pressure behind the valve is balanced with the spring force, so that the pressure behind the valve remains constant within a certain error range.

Pressure regulation range: It refers to the adjustable range of the output pressure P2 of the pressure reducing valve, within which the specified accuracy is required. The range of pressure regulation is related to the stiffness of the pressure regulating spring.

The pressure reducing valve relies on the local resistance of the flow channel inside the valve to reduce water pressure. The range of water pressure reduction is automatically adjusted by the inlet and outlet water pressure difference on both sides of the diaphragm or piston connected to the valve disc. The principle of fixed ratio pressure reduction is to use the water pressure ratio control of the floating piston in the valve body, and the pressure reduction ratio at the inlet and outlet ends is inversely proportional to the area ratio of the piston on the inlet and outlet sides. This pressure reducing valve works smoothly without vibration; There is no spring inside the valve body, so there is no concern of spring corrosion or metal fatigue failure; Good sealing performance without leakage, thus reducing both dynamic pressure (when water flows) and static pressure (when flow rate is 0); Especially when reducing pressure without affecting water flow.

(2) Pressure characteristic: It refers to the characteristic of output pressure fluctuation caused by input pressure fluctuation when the flow rate g is constant. The smaller the output pressure fluctuation, the better the characteristics of the pressure reducing valve. The output pressure must be lower than the input pressure - a constant value in order to remain largely unchanged with changes in input pressure.

(3) Flow characteristics: It refers to the persistence of input pressure timing and output pressure changing with the variation of output flow g. When the flow rate g changes, the smaller the change in output pressure, the better. The lower the output pressure, the smaller the fluctuation with the change of output flow rate.

Dimensional and structural diagram of ATOS pressure reducing valve