700X Pump Control Valve

700X Pump Control Valve is a hydraulically operated self-powered multi-functional valve specially designed for installation at water pump outlets. It is widely used in municipal water supply, building water supply, fire pump rooms, water treatment plants and industrial circulating water pipeline systems. Integrating slow opening, staged slow closing and one-way non-return functions, this valve effectively suppresses destructive water hammer pressure, prevents fluid backflow and pump reverse rotation after shutdown, providing reliable protection for water pumps, pipelines and related pipe fittings.

The valve body is cast from high-strength ductile iron with excellent mechanical strength and pressure resistance. Standard pressure ratings include PN10 and PN16 with flanged connection for stable assembly. The whole valve operates purely by medium pressure without external power supply. Equipped with pilot control pipelines and adjustable needle valves, engineers can flexibly set opening and closing speed according to on-site pipeline conditions to achieve optimal water hammer elimination effect.

Working principle: When the water pump starts, the gradual rise of pipeline pressure pushes the valve to open slowly, avoiding sudden surge pressure caused by instantaneous water flow impact. When the pump stops, backflow pressure acts on the pilot system. The valve executes staged closing action: it quickly closes most of the passage to cut off main reverse flow, then slowly completes the remaining closing stroke. This design greatly reduces vibration and pressure shock on the pipeline. At the same time, it realizes one-way sealing to prevent the pump impeller from being damaged by reverse rotation.

Compared with the traditional scheme equipped with independent gate valve and swing check valve, the 700X pump control valve reduces the number of pipeline components, saves installation space, simplifies pump room layout, shortens construction period and lowers overall project investment. Complete specifications cover DN50 to DN800. The applicable medium is clean water such as tap water, fire service water and cooling circulating water, with working temperature ranging from 0℃ to 80℃. Horizontal installation at pump outlet is recommended.

Installation and operation reminders: Installation direction must strictly follow the flow arrow marked on the valve body. A Y-type strainer must be installed upstream to prevent impurities from blocking the small-bore pilot pipeline. Needle valves should be adjusted moderately; excessively fast or slow closing will weaken anti-water hammer performance. This valve cannot serve as a long-term isolation shut-off valve.

All finished valves pass strict shell hydrostatic test, sealing test and functional action test before delivery. Every unit is inspected to ensure smooth pilot control and stable sealing performance. The integrated structure reduces potential leakage points and subsequent maintenance workload.

With hydraulic self-driving, three-in-one protection, adjustable opening/closing speed and remarkable water hammer suppression capability, 700X Pump Control Valve is highly recognized by global engineering contractors. Our factory can provide different flange standards and customized anti-corrosion coatings to meet diversified procurement requirements of water supply and fire protection engineering projects.