Why choose the tilting check valve with weight hammer
The valves shown in the picture are tilting check valves with weight hammer manufactured by Jinbin Valve, with sizes ranging from DN250 to DN700. The valve body is made of WCB carbon steel, equipped with counterweights and hydraulic cylinders, and rated for working pressures PN16, PN20 and PN25.
This counterweight & hydraulic cylinder type low-resistance slow-closing butterfly check valve adopts a two-stage opening-closing structure. When the water pump is running, medium pressure pushes the butterfly disc open; the counterweight lifts along with the disc to balance the self-weight of the butterfly plate, greatly reducing water flow resistance. Meanwhile, the medium flows into the hydraulic cylinder to store pressure. At the moment of pump shutdown, under the combined force of self-weight, counterweight tension and reverse flow pressure, the butterfly disc rapidly closes 80%~90% of the flow passage to block most backflow. The remaining 10%~20% stroke is closed slowly via hydraulic cylinder damping. A needle valve enables precise adjustment of slow-closing duration, which dissipates the impact force of reverse flow step by step and fundamentally suppresses water hammer shock waves.
Core Application Advantages
1.Eliminate water hammer and protect equipment
Staged closing weakens high-pressure water hammer generated upon pump shutdown, preventing pipeline rupture and pump shaft reversal damage, and significantly cutting pipeline maintenance costs.
2.Ultra-low flow resistance for energy saving
The counterweight balances the butterfly plate weight for unobstructed full-opening flow. Its head loss is over 40% lower than that of conventional swing check valves, delivering long-term power and cost savings.
3.Durable and reliable sealing performance
It features a double-eccentric butterfly disc sealing structure for tight closure. The valve body is coated with epoxy anti-corrosion paint, suitable for multiple media including clean water, sewage and circulating water.
4.Flexible adjustment with wide applicability
The independent hydraulic damping system allows on-demand fine-tuning of slow-closing time. It outperforms spring-loaded silent check valves by a large margin for large-diameter pump stations (DN300 and above).
Conventional standard check valves shut fully instantaneously, which easily triggers severe water hammer. Frequent impact shortens the service life of water pumps, pipelines and flanges. Spring-loaded types are only viable for small-bore sizes, lacking sufficient thrust and cushioning capacity for large diameters.
Custom-engineered for pump outlets, this valve integrates three functions: non-return, water hammer suppression and low flow resistance. It replaces a combination of standard check valve plus buffer device, reducing pipeline fittings. In large-flow systems such as municipal water supply, power plant circulating water, chemical water supply & drainage, and sewage pump stations, it stably safeguards pipeline operation safety, extends the service life of the overall equipment set, and delivers superior cost performance in comprehensive operation and maintenance.
