Product Introduction:

The micro-resistance self-closing check valve is a hydraulic self-closing type check valve specifically installed at the water outlet of the water pump. 

Its core function is: to prevent the backflow of the medium + to slowly close in segments to reduce the destructive water hammer during pump shutdown, thereby addressing the pain points of ordinary swing-type check valves such as rapid valve slamming, pipeline vibration, and pump reverse rotation and burst.

Advantages:

1.Cure pump shutdown water hammer, protect pipeline network and water pump:

Two-stage buffer closing, eliminate high-pressure shock waves of water hammer, reduce pipeline weld cracking, flange leakage, and pump shaft fracture faults.

2.Low resistance at full opening, energy saving and consumption reduction:

The valve disc opening angle is large, the flow is smooth, and compared with the lift type check valve, the annual power consumption of the pump is lower.

3.Excellent sealing performance, rubber flexible seal:

The valve disc is rubber-sealed, low-pressure maintains zero leakage, the spherical model comes with a centering function, and is less likely to wear and leak.

4.Quiet operation without vibration:

Damping buffer closing, the noise of valve seat impact is significantly reduced, and the noise reduction effect in the pump room is obvious.

5.Adjustable closing duration:

Adjust the oil cylinder throttle valve according to the pump head height and the length of the pipeline to adapt to high and low head pump stations.

6.Easy maintenance:

The top valve cover can be used for maintenance of the valve disc, damping oil cylinder oil seal, without the need for overall disassembly of the valve.

7.Wide installation adaptability:

HH44X is the best for horizontal installation; HQ45X spherical model can be installed horizontally or vertically.

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.