1. Shut-off valve
This type of valve is used for opening and closing.
Standing on the inlet and outlet of cold and heat sources, equipment inlet and outlet, pipeline branch lines (including risers), it can also be used as a water discharge valve and a gas discharge valve.
Common shut-off valves are globe valves, ball valves and butterfly valves.
There are three types of globe valves: straight-through, right-angle and direct-flow according to the flow direction of the medium. The closing tightness of the globe valve is better than the gate valve, the valve body is long, and the flow resistance is large.
The spool of a ball valve is an open hole. The ball valve has a certain adjustment performance and is tightly closed.
The valve core of the butterfly valve is a circular valve plate, which can rotate along the vertical axis perpendicular to the pipeline axis.
Butterfly valve body length is small, flow resistance is small.