A brief introduction to back-seated butterfly valve without pin
The back-seated butterfly valve without pin is a valve that uses a disc type opening and closing member to reciprocate about 90 degrees to open, close and adjust the fluid channel. The pinless butterfly valve is not only simple in structure, small in size, light in weight, low in material consumption, small in installation size, but also has small driving torque, easy and fast operation, and can also have good flow adjustment function and closing sealing characteristics at the same time. One of the fastest growing valve varieties in more than ten years.
Back-seated butterfly valve without pin, as a component used to realize on-off and flow control of pipeline system, has been widely used in many fields such as petroleum, chemical industry, metallurgy, hydropower and so on.
In the known back-seated butterfly valve without pin technology, its sealing form mostly adopts sealing structure. Due to the limitation of structural characteristics, it is suitable for industries such as high temperature resistance, high pressure, corrosion resistance and wear resistance. A relatively advanced pinless butterfly valve is a triple eccentric metal hard-sealed pinless butterfly valve. The valve body and the valve seat are connected components, and the sealing surface layer of the valve seat is surfacing with temperature-resistant and corrosion-resistant alloy materials.
The multi-layer soft-stacked sealing ring is fixed on the valve plate. Compared with the traditional pinless butterfly valve, this pinless butterfly valve has high temperature resistance, easy operation, no friction when opening and closing, and compensates the sealing with the increase of the torque of the transmission mechanism when closing. , which improves the sealing performance of the back-seated butterfly valve without pin and the advantages of prolonging the service life.