A pressure reducing valve is a valve that, through adjustment, reduces 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 component with variable local resistance. That is, by changing the throttle area, the flow rate and kinetic energy of the fluid are altered, resulting in different pressure losses, thereby achieving the purpose of pressure reduction.

Then, relying on the adjustment of the control and regulation system, the fluctuation of downstream pressure is balanced with the spring force, ensuring that the downstream pressure remains constant within a certain error range. The Italian OR imported pressure reducing valve, with its exquisite craftsmanship and technology, has solved the problem that domestic pressure reducing valves only reduce dynamic pressure and not static pressure.

When someone uses water downstream of the inlet pressure reducing valve, pressure loss occurs through the valve core. The magnitude of the pressure loss is determined by the size of the valve core opening, which in turn is determined by the spring force. Therefore, by adjusting the spring on the top of the inlet pressure reducing valve to control the valve core opening, the pressure loss can be controlled to achieve the desired downstream pressure.

When there is no water usage downstream of the inlet pressure reducing valve, the downstream pressure increases. At this point, the downstream pressure plus the upstream pressure exceeds the spring force, pushing the valve core up to its limit (the pressure reducing valve is in a normally open state). This completely isolates the upstream fluid from the downstream fluid. At this time, the outlet pressure of the pressure reducing valve is greater than the set value. However, due to inertia, the upward moving diaphragm will not stop immediately but will continue to move up a bit, which is equivalent to the valve chamber at the outlet becoming larger, the volume increasing, and the pressure of the internal liquid decreasing until it is exactly equal to the set pressure value at the outlet of the pressure reducing valve.

Therefore, the inlet pressure reducing valve can not only reduce dynamic pressure but also static pressure, and the outlet pressure fluctuation is small.