Butterfly valve or gate valve to choose which?

Butterfly valve and gate valve are more commonly used valves, so which is good? After reading the following analysis, you may have a good idea!

Gate valves

In terms of the action

Gate valve is a straight stroke valve, that is, the valve stem drives the valve plate to do vertical movement up and down to complete the opening and closing of gate valve, so the flow resistance of gate valve is small, but due to its high opening height, the opening and closing speed is slow.

Butterfly valve is an angular stroke valve, that is, the disc of butterfly valve rotates around the valve shaft 90° to complete the opening and closing action of butterfly valve. The opening height of butterfly valve is only one fourth of the diameter of the channel, so it opens and closes quickly. Tianjin gate valves

From the point of view of function and use

The flow resistance of gate valve is small and the sealing performance is good. The flow direction of valve plate and medium is vertical Angle. If the valve plate switch of gate valve is not in place, the flushing of medium on the valve plate will make the valve plate vibrate, which will easily cause the sealing damage of gate valve. So the gate valve is more used to require strict sealing and do not need frequent opening and closing of the pipe to do cut-off, and not suitable for the role of adjusting the pipe medium parameters. Due to slow opening and closing speed of gate valve, it is not suitable for emergency cutting occasions. Gate valve operating conditions are very wide, in high temperature, low temperature, high pressure, low pressure and other conditions can be used; Long service life in cut-off service.

Butterfly valve not only has a cut-off function, and has an adjustment function. Butterfly valves open and close quickly, can be frequently opened and closed, in the need to open quickly or cut off the occasion is especially suitable. Compared with gate valves, butterfly valves are small in size, light in weight and cheap in price. In some working conditions where installation space is limited, butterfly valves can be connected in pairs to save more space. Butterfly valves can also be made of large diameter, DN300 diameter butterfly valves used more.

Butterfly valves can also be used to transport medium pipe containing small particles of impurity. But butterfly valves use a small range of pressure and temperature, and sealing performance is not as good as gate valves. Butterfly valves of the same diameter cost much less than gate valves. In many operating conditions, butterfly valves gradually replace other types of valves, becoming the first choice for many users.