How to connect butterfly valves? At present, common butterfly valves on the market include flange connections, pairing connections, clamp connections, etc. 

 1. Fland connection 

 The flange connection is a flange at both ends of the valve body, which corresponds to the flange of the pipe, and the flange is bolted and installed on the pipe. 

 2. Pairing connection 

 Pairing connection means that the valve is installed between two flanges. The valve body usually has positioning holes for easy positioning, and bolts are directly inserted into the valve and the connection between the two pipes. 

 3. Clamp connection 

 The clamp connection, also known as the groove connection, is a quick assembly joint composed of a combined clamp, C-type rubber seal and fastener after the connection part of the flat mouth of the pipe and pipe fittings is processed into a circular groove.