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Butterfly Valve
Installation Method and Precautions of Butterfly Valve
2023-04-06

Direction

When installing the butterfly valve, pay attention to the installation arrow on the valve body. If it is two-way pressure, it can achieve two-way sealing, and there is no installation direction.

Water Inlet Configuration

There are elbows and T-shaped pipes on the water inlet side of the butterfly valve, which cause the fluid to bend and distribute unevenly. When the fluid flows into the valve, a bias flow will occur in the pipe. The sides are stressed unevenly and may generate additional moments.

Water Outlet Configuration

If it is on the pipeline, in order not to bear the force and bending moment from the applied axial direction on the valve, it is best to install an expansion joint on the outlet side of the valve. The water pressure of the valve when the valve is opened and closed should not be borne by the foot, but by the pipeline through the flange of the valve.

Installation Size

Butterfly valves generally have a relatively short structural length, and its butterfly plate will extend into adjacent pipes or other components, so care should be taken not to collide with and interfere with other parts. Furthermore, it is necessary to prevent the error of the inner diameter of the matching pipe from being too large and colliding with the butterfly plate.

Precautions

The relationship curve between the flow rate and the rotation angle of the butterfly valve is like an integral symbol, which belongs to the parabolic type. When the rotation angle is increased under certain circumstances where the butterfly plate opening is greater than 60°, the change in the flow rate is small. Similarly, there is a similar situation when the disc rotation angle is less than 15°.


In order to obtain a good adjustment effect, the following points should be paid attention to:

a. In order to obtain a good adjustment effect, the diameter of the valve is often smaller than that of the matching pipe.

b. According to experience, the diameter should be determined so that the flow rate of the valve can reach 5m/s.

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