Dual plate check valve H77X butterfly plate is two semicircles, and the spring forced reset, sealing surface can be body stacking welding wear-resistant material or lining rubber, a wide range of use, reliable sealing. Used for industry, environmental protection, water treatment, high-rise building water supply and drainage pipe, to prevent the reverse flow of the medium.
Operating principle of the butterfly check valve:
The dual plate wafer check valve H77X disc movement space is small, and the resulting length of the valve can be reduced. The disc of the butterfly check valve moves only near the fluid center, and the height of the valve can be lowered. Therefore, the valve has a compact structure. The valve is wing-shaped. The disc is wide open.
When the butterfly check valve fluid flows, the rotation radius of the valve disc is small, and the valve disc can be opened quickly. And in the later stage, the heavy hammer is off the center line, helping the valve disc to reach the full open position, and can play a stable role, free from the influence of water flow, so that the action resistance is small. Therefore, when the fluid is positive, the fluid pressure loss is small.
Features of the check valve products:
1, small volume, light weight, compact structure, easy to maintain.
2, the valve plate using the dual plate with two torsion spring design, can make the valve plate quickly close.
3, because of the speed closing, can prevent the medium backflow, eliminate the water hammer strong.
4, the valve body structure length is small in size, good rigidity.
5, convenient installation, can be installed in the horizontal and vertical two directions of the pipeline.
6, to achieve the full seal, the hydrostatic test leakage amount is zero.
7.Reliable use performance, good anti-interference performance.
Standard for dual plate wafer check valve:
1. Flange connection size: GB/T1724.1-98
2. Structure length: GB / T12221-1989, ISO5752-82
Dual plate check valve is also known as check valve, it is a kind of automatic valve according to the fluid pressure difference before and after the valve, the function of butterfly check valve is to only allow the fluid to flow in a single direction, preventing them from reverse flow. Domestic check valve has two types of liquid and gas use. Both liquid and gas check valves with a diameter below 100 mm are made of cylinder type. When the fluid enters the check valve, the valve port needs to overcome the spring resistance.
Therefore, the fluid has a pressure loss when it passes through the check valve. The spring of the gas check valve for the return pipe should be selected as soft to reduce the pressure loss to a small limit. The advantage of this tubular painted check valve is that it can be installed in any direction, including upward, downward, horizontal and inclined direction.
DN125 mm are made of horizontal. This check valve has only one type of air use.
The valve seats of the above two types of butterfly check valves are made of steel, one soft and one hard can ensure that the closure is tight, the piston (valve core seat) has a damping effect, can play a buffer effect on the pulse air flow, the valve mouth opening and closing balance buckle core is not easy to break.
Besides, we are TWS Valve company and has more than 20 years experience in producing and exporting valves. Reilient Butterfly Valve, Gate Valve, Check Valve, Ball Valve, Backflow Preventer, Balancing Valve and Air Releasing Valve are our main products.
Post time: Nov-11-2023