Thread Content
A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure through regulation, and relies on the energy of the medium itself to maintain the outlet pressure stable automatically. From a fluid dynamics perspective, a pressure reducing valve is a throttling element whose local resistance can be varied; by changing the throttling area, the flow velocity and the kinetic energy of the fluid are altered, resulting in different pressure losses and thus achieving the purpose of pressure reduction. Then, through the regulation of the control and adjustment system, the fluctuations in the pressure behind the valve are balanced with the spring force, thereby keeping the pressure behind the valve constant within a certain error range. Working principle: When water is used after the inlet pressure reducing valve, pressure loss occurs as the water passes through the valve core. The magnitude of this pressure loss is determined by the size of the opening in the valve core, which in turn is determined by the force of the spring. Therefore, by adjusting the spring at the top of the inlet pressure reducing valve, the size of the valve core opening can be controlled, and thus the pressure loss can be regulated to achieve the desired pressure downstream of the valve. When no one is using water downstream of the inlet pressure reducing valve, the pressure downstream of the valve increases. At this point, the pressure downstream plus the pressure upstream becomes greater than the force of the spring, which pushes the valve core upward and holds it in place (the pressure reducing valve is in an open state). This prevents fluid from flowing between the area upstream of the valve and the area downstream of it. The pressure at the outlet of the pressure reducing valve is then higher than the set value. However, due to inertia, the diaphragm that is moving upward does not stop immediately; it continues to move upward a little more, which results in an increase in the volume of the chamber at the outlet. As a result, the pressure of the liquid inside decreases until it equals the set pressure value at the outlet of the pressure reducing valve. Therefore, the imported pressure reducing valve can reduce both dynamic and static pressure, with minimal fluctuations in outlet pressure.