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Ductile iron double flange butterfly valve

Butterfly valve, is a simple structure of the control valve, it can be used to control the flow of air, water, steam, corrosive media, mud, oil, and other types of fluid. It is mainly used for cutting and throttling in pipelines. Butterfly valve opening and closing parts is a disc shaped disc, in the valve body around its own axis rotation, so as to achieve the purpose of opening and closing or regulation.

The main features of flange butterfly valve are as follows:

1.Small and light, easy to disassemble and repair, and can be installed in any position.

2.Simple and compact structure, low operating torque, 90 ° The swing opens quickly.

3.The flow characteristics tend to be linear and the regulation performance is good.

4.The connection between the butterfly plate and the valve stem adopts a pin free structure, which overcomes the possible internal leakage point.

5.The outer circle of the butterfly plate adopts spherical shape, which improves the sealing performance and prolongs the service life of the valve. The valve can be opened and closed under pressure for more than 50000 times and still has zero leakage.

6.The sealing element can be replaced, and the sealing is reliable to achieve bidirectional sealing.

7.The valve can be designed as flange connection and pair clamp connection.

8.The driving mode can be manual, electric or pneumatic.


Technical parameter for double flange butterfly valve:


The above data is for reference only, please contact us for more details.

Flange butterfly valve series:
Why do valves always fail? In the whole process of design,manufacture, installation,working condition,operation and maintenance,every step should not be lax.

The valve inspection process is as follows:

1:Appearance inspection:

(1)Whether there are sand holes, cracks and other defects on the inner and outer surface of the valve body;

(2)Whether all parts of the valve are damaged, whether the valve body is marked, etc;

2:Performance test

3.Shell strength test

4.Sealing test

5.Action performance test

6.Vacuum sealing test

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