Hard seal butterfly valve, also called flap valve, is a regulating valve with simple structure, and can also be used for switching control of low pressure pipeline medium. Hard seal butterfly valve is mainly used to cut off and throttle the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting. The hard seal butterfly valve is applicable to the pipelines conveying various corrosive and non-corrosive fluid media in generator, gas, steam, natural gas, city gas, hot and cold air, chemical smelting engineering and power generation environmental protection system, and is used to regulate and cut off the flow of media. Hard seal butterfly valve can be divided into manual hard seal butterfly valve, pneumatic hard seal butterfly valve and electric hard seal butterfly valve.

The pressure test standard of hard seal butterfly valve is as follows:

For the sealing performance test of butterfly valve, the test medium shall be introduced from the medium flow human end, the butterfly plate shall be opened, the other end shall be closed, and the injection pressure shall reach the specified value; After checking that there is no leakage at the packing and other seals, close the butterfly plate, open the other end, and check that there is no leakage at the butterfly plate seal. The butterfly valve used for regulating flow can be exempted from sealing performance test.

How to store the electric hard seal butterfly valve?

1. The electric hard seal butterfly valve shall be placed in a dry and ventilated room and shall not be stored in the open air;

2. The sealing ring of electric hard seal butterfly valve shall not contact with oily substances to avoid aging;

3. Electric hard seal butterfly valves with storage period of more than 18 months shall be retested before installation and use to ensure the integrity of structure and function;

4. When the electric hard seal butterfly valve is placed, it is necessary to ensure that the electric device is not squeezed and the wiring terminal is not damaged, and to prevent contact with corrosive substances.

5. Electric hard seal butterfly valve shall be handled with care during handling to avoid damage to electrical components and mechanical parts.