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.
