Product Introduction

The 200X diaphragm pressure reducing valve is designed and manufactured by our unit's nominal technical personnel with reference to advanced products of the same type in the United States, France, and China. Suitable for use in industrial and mining enterprises, high-rise buildings, domestic water, and fire water systems, it can replace intermediate water tanks in situations where static and dynamic pressure reduction is required, saving the cost of intermediate water tanks in buildings and expanding the space for building use. The valve body adopts a full channel streamline design, with low fluid resistance and high flow rate. Hydraulic operation is adopted in the transmission mode, which uses the water pressure in the pipeline to automatically operate the up and down movement of the main valve disc, control the valve opening, adjust the downstream pressure, and maintain the downstream pressure at the pressure value set by the pilot valve spring. When the downstream pressure exceeds the set value, the pressure reducing valve will automatically close, and regardless of the fluctuation of the inlet pressure P1, a stable outlet pressure P2 can be output. No matter how the downstream flow changes, the outlet pressure P2 can be maintained stable at the set value of the pilot valve. At the same time, the outlet pressure adjustment range regulated by the pilot valve is large, reaching 10-80% of the pre valve pressure, and it works smoothly without water hammer impact.

Product diagram of 200X diaphragm pressure reducing valve

working principle of 200X Diaphragm Pressure Reducing Valve

The inlet pressure P1 enters the control chamber of the main valve through the conduit and needle valve 18 (see structural diagram), and establishes a downward pressure P3. The outlet pressure P2 also acts on the diaphragm (or piston) of the pilot valve through the conduit and opposes the regulating spring of the pilot valve. When the downstream pressure exceeds the set value of the pilot valve spring, the pilot valve closes, and the water discharge in the control chamber is 0. When the variable pressure P3 reaches its maximum value, the main valve disc tightly presses the valve seat and the pressure reducing valve closes. Once the downstream pressure P2 drops to the set value of the pilot valve spring, the pilot valve opens and the pressure water in the control room will be discharged downstream through pilot valve 9 and ball valve 6. Due to the small opening of the needle valve and the smaller diameter of the inlet duct compared to the outlet duct, the discharge rate is greater than the inlet pressure replenishment rate. As a result, the pressure P2 in the control room decreases, and the inlet pressure P1, which has been acting under the main valve disc, lifts the main valve disc and opens the pressure reducing valve. In the fixed adjustment state, the discharge flow rate is equal to the replenishment flow rate, the opening of the main valve remains unchanged, and the downstream pressure is stable. (This is the working principle of diaphragm type, and the same applies to piston type.)