Ductile Iron Diaphragm-Type Pressure Reducing and Stabilizing Valve YX741X-16Q

YK741X diaphragm-type pressure reducing and stabilizing valve consists of main valve and needle regulating valve, pilot valve, ball valve and take-over system, the main valve body adopts the full channel, DC type, streamline design and two types of diaphragm-type or piston type structure. This product utilizes setting the spring pressure of the regulating pilot valve and adjusting the opening of the needle valve to set the outlet pressure, and stabilizes the outlet pressure through the feedback effect of the receiver system and the control room.

Working Principle

When the pipeline is fed from the inlet end, the water flows through the needle valve into the main valve control chamber, the outlet pressure acts on the pilot valve through the conduit, when the outlet pressure is higher than the set value of the pilot valve, the pilot valve closes, and the control chamber stops draining water, at this time, the pressure in the main valve control chamber rises and closes the main valve, and the outlet pressure does not rise any more. When the outlet pressure drops to the pilot valve set pressure the pilot valve opens and the control chamber drains downstream. As the drain volume of the pilot valve is larger than the inlet volume of the needle valve, the pressure in the main valve control chamber drops and the inlet pressure opens the main valve. In steady state, the control chamber feeds and drains the same amount of water, the opening degree remains the same, and the outlet pressure remains the same. The outlet pressure can be set by adjusting the pilot valve spring.

Work Characteristics

• Pressure control is stable and reliable. The pilot valve and main valve operate continuously, ensuring smooth and steady downstream pressure changes with minimal influence from inlet pressure.
• Easy to operate. Once the working pressure is set, the main valve automatically adjusts when upstream pressure or flow changes, maintaining stable downstream pressure.
• The valve body features a full-bore, straight-through, streamlined design. It minimizes hydraulic loss and delivers excellent energy-saving performance.

Function and Purpose

This valve is typically installed upstream in water supply pipeline systems to reduce and stabilize pressure for downstream pipelines or equipment. This series of valves is widely used for water pressure control in high-rise buildings, residential areas, or other water supply pipeline systems.

Product Parameters

Product Size Reference