Unidirectional sealing butterfly valve is that when the front of the butterfly plate of the butterfly valve is closed, it must face the flow direction of the medium; the medium only flows in one direction, and there must be an arrow indicating the flow direction of the medium on the valve body.…

The all-metal two-way pressure butterfly valve adopts a three-eccentric structure. It is completely sealed by the torque provided by the driving device. The valve can be reliably sealed under high and low pressure. That is, an angle eccentricity is added to the double eccentricity of the ordinary metal hard seal butterfly valve.…

The traditional metal hard seal butterfly valve is used to realize the on-off and flow control components of the pipeline system, and it is extremely widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower and so on. In the known butterfly valve technology, the sealing form is a sealing structure, and the sealing material is rubber or polytetrafluoroethylene.…

The valve is in a half-open state, and the experimental medium is completely injected into the valve and the valve cavity. Then close the valve and open the valve body relief valve to allow excess test fluid to escape from the valve cavity test port. …

The flat gate valve with diversion hole is installed on the pipeline, and the pig can be used for pigging directly.…