Product Introduction:

Slow closing water hammer reducing performance
1. When the medium flow back, the valve close fastly and then flow slowly, the slowly closing time can be adjustable in 0-60 seconds.
2.  When the medium flowing back in the pipeline,the valve can be adjusted to the peak value of water hammer 1.5 times greater than the working pressure.
3.  When the medium flowing back,the valve can be adjusted to the pump reverse speed that is not more than 1.3 times of the rated speed.
Working Principle
 The valve is mainly composed of valve body, bonnet,disc, piston, needle valve (micro control valve) and a heavy hammer. Under the pushing force of the medium inlet of the valve,the valve disc is automatically pushed away, when the valve disc is fully opened, the balance hammer falls forward to the backward of the valve disc, so as to balance the weight of the valve disc, and the pressure to the water because of the valve disc weight. Additionally, the water inner the valve body flow into the cavity of the piston and the piston is fully pushed.

Key Technical Parameters:

Nominal diameter: DN40 - DN1200

Nominal pressure: PN10, PN16 (main force), PN25 (high pressure customization)

Applicable temperature: EPDM rubber seal 0 - 80℃, high temperature customization can reach 200℃

Valve body material:

QT450 ductile iron: main force for pumping stations, resistant to vibration, water hammer impact, and less prone to cracking.

HT200 gray cast iron: conventional water supply economy type.

WCB carbon steel / 304 stainless steel: high temperature, seawater corrosion-resistant working conditions.

Sealing material: EPDM (fresh water / sewage), NBR (contaminated wastewater).

Slow-closing adjustment time: 3 - 60 seconds, stepless adjustable, suitable for different head water pumps core structure (HH44X swing type structure disassembly)

Application scenarios:

Municipal water treatment plants, centrifugal pump outlet of secondary water supply (standard choice preferred).

Urban rainwater pumping stations, lifting pump pipelines of sewage treatment plants.

Central air conditioning cooling circulation water pump rooms.

Waterproof hammer protection for the main water outlet of high-rise fire pumps.

Reservoir pumping stations, main pipelines for long-distance water transmission.

Old pipeline network renovation (replacing old single-plate check valves to solve vibration and leakage problems).

All valves are equipped with professional export protective packaging. 

With protective caps on the sealing surfaces, rust-proof treatment, and shock-absorbing material filling to ensure intact transport; the loading is secure and safe. 

We can also customize packaging according to customer requirements.

Regarding transportation methods, we can provide appropriate transportation options based on the cargo requirements and the customer's timeliness requirements. 

Common transportation methods include: sea freight, air freight, land freight, and express delivery.