Technical background
The existing gate valve cannot be used only if the sealing surface is slightly deformed or corroded when the valve body, bonnet and all parts are intact. Repairing these valves can't be done by non-professional factories, which causes great waste. Therefore, users hope that the sealing surfaces of valve seats and valve plates are not easy to deform, corrosion resistant, and vulnerable sealing materials can be replaced. When the valve plate is opened and closed, there should be no friction with the sealing surface or the friction should be reduced as much as possible, so as to avoid the shortcomings of the resilient seat sealing gate valve.
Design purpose
After the corrosion or deformation of the sealing surface of the valve seat and the valve plate, the valve plate can automatically compensate and press the sealing surface and the pressure between the valve plate and the elastic seat sealing gate valve can be automatically balanced, and the problem of the sealing surface damaged by the friction of the soft sealing material can be solved. Because the sealing sleeve of the gate valve can be replaced, the use of the valve can be greatly increased.

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