The valve stem axis of the vacuum shut-off valve is perpendicular to the sealing surface of the valve seat. The opening and closing stroke of the valve stem is relatively short, and it has a very reliable cut-off action. The valve is very suitable for the cut-off and throttling of the medium. The vacuum stop valve and the flange gate valve are the same type of valve, and the closing part is the valve body. The valve body rotates around the center line of the valve body to reach the opening and closing valve. The gate valve is mainly used for pipe cutting, distribution and changing the flow direction of the medium.
The valve stem axis of the vacuum valve cut-off valve is perpendicular to the sealing surface of the valve seat. The opening and closing stroke of the valve stem is relatively short, and it has a very reliable cut-off action. The valve is very suitable for the cut-off and throttling of the medium. When the valve of the shut-off valve is opened, the valve seat and the sealing surface of the valve no longer contact, and it has a very reliable shut-off action, which is suitable for the shut-off or regulation and throttling of the valve as a medium.
When the shut-off valve is opened, there is no contact between the valve seat and the sealing surface of the valve seat, and the mechanical abrasion of the sealing surface is small. Most of the shut-off valve seats and valve seats are easy to repair or replace the sealing parts, without removing the entire valve from the pipeline. Seat, so it is suitable for integrated welding of valve seat and pipeline. The flow direction of the medium when passing through this valve changes, and the flow resistance of the stop valve is higher than that of other valves.
In this valve, the valve and the valve seat are usually designed according to the plunger principle. The valve is polished so that the plunger is connected to the valve stem, and the seal is realized by two elastic sealing rings sleeved on the plunger. The two elastic seals are separated by a ferrule, and the seal ring around the plunger is pressed by the load exerted by the bonnet nut on the bonnet. The elastic sealing ring can be replaced, and various commonly used stop valves can be used. Made of various materials, the valve is mainly used to open or close, but a special form of plunger or special sleeve can also be used to adjust the flow.