Butterfly valve is a kind of valve that uses a disc type opening and closing member to reciprocate about 90° to open, close and adjust the fluid channel.

The selection of wedge gate valve is generally based on the following principles: 1. Requirements for valve fluid characteristics. Gate valves are selected for working conditions with small flow resistance, strong flow capacity, good flow characteristics and strict sealing requirements.

Among various types of valves, the gate valve is the most widely used one. It is generally only suitable for fully open and fully closed, cannot be used for adjustment and throttling.

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The sealing principle of the wedge gate valve is sealed by the tight combination of the two sealing surfaces on the wedge disc and the two sealing surfaces on the valve body when wedging. The purpose of using the wedge disc is to increase the auxiliary sealing load, so that the metal-sealed wedge gate valve can seal both high medium pressure and low medium pressure.