Reducing Valve is to reduce the inlet pressure to some required outlet pressure by adjusting, and rely on the energy of the medium itself, so that the outlet pressure automatically remain stable. From the point of view of fluid mechanics, pressure reducing valve is a throttle element that local resistance can be changed, that is, by changing the throttling area, the flow velocity and kinetic energy of the fluid change, causing different pressure loss, so as to achieve the purpose of decompression. Then rely on the adjustment of the control and regulation system to balance the fluctuation of the pressure behind the valve with the spring force, so that the pressure behind the valve remains constant within a certain error range.
