Ductile Iron Cast Steel Micro Resistance Slow Closing Check Valve
Product introduction:
The HH44X series micro resistance slow closing check valve is composed of a valve body, valve cover, valve disc, valve shaft, and regulating valve. Used for water supply and drainage pipelines, installed at the outlet of the water pump to prevent medium backflow and eliminate destructive water hammer, and can effectively reduce valve closing water hammer pressure, ensuring the safe operation of the pipeline network.
The HH44X series micro resistance slow closing check valve relies on the flow rate and water head of the inlet medium, and the valve disc automatically opens to allow the medium to pass through. The pressure water inside the valve body flows into the rear chamber of the piston assembly through a micro valve, pushing the piston out of the piston chamber. When the water flow stops (or when the water pump suddenly stops running), the valve disc automatically closes due to its own weight and the effect of water backflow. However, due to the piston being in the pushed out position, it presses against the valve disc, preventing it from fully closing the valve port. The remaining 20% of the opening allows water to flow through, which weakens the water hammer pressure. When the valve disc is pressed against the end of the piston, due to the generation of reaction force, the water in the rear chamber of the piston prevents the piston from exiting and also prevents the valve disc from closing. The valve disc will slowly close through the control of the micro adjustment valve.
Product technical paramters:
| Type Number: |
H44H-16Q |
| Nominal Pressure PN(MPa) |
1.6 |
| Nominal Diameter DN(mm) |
50～600 |
| Test pressure (MPa) |
Strength (water) |
2.4 |
| Sealing (water) |
1.76 |
| Raw material |
QT450 |
| Medium suitable: |
Water |
| Working temperature |
≤80℃ |
| Connection type |
Flange |
| Operational method |
Auto |
Product features:
1. The micro resistance slow closing check valve has the characteristics of light valve disc, large opening, low fluid resistance, novel design of water hammer elimination mechanism, stable and reliable sealing performance, wear resistance, long service life, smooth operation, no vibration, and no noise.
2. Equipped with a counterweight device. When the valve disc is rotated, the resistance to water flow is small, and the opening force is only 20% of that of the rotary valve, making it an energy-saving product.
3. The rear stroke of the valve disc is equipped with a damping device, and the damping time is adjustable to prevent the generation of destructive water hammer.
4. The innovative valve disc design with adhesive coating ensures reliable sealing, corrosion resistance, vibration reduction, wear resistance, and long service life; Smooth operation with low noise.
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Ductile Iron Cast Steel Check Valve Micro Resistance Slow Closing Check Valve Images
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