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| add time： | 2016-01-18 14:57:10 |
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Gate valve (gate valve) is a opening and closing the gate assembly, perpendicular to the direction of movement and direction of flow of the gate, gate valve can be fully open and fully closed, discomfort door parameter varies, usually 5 degrees, the medium temperature is not high for 2 ~ 52 '. Improve the process, make up the sealing surface angle in the process of the deviation, which is called the gate.
advantage：
1, flow resistance is small. Body internal media channel is through, the media into a straight flow, flow resistance is small.
2, open and close when more effort. Is compared with the cut-off valve, because whether it is open or closed, the direction of movement of the gate and the direction perpendicular to the media flow.
3, a high degree of large, open and close for a long time. The opening and closing of the gate is larger, and the reduction is carried out through the screw.
4, water hammer phenomenon is not easy to produce. The reason is that the closure time is long.
5, medium can flow in any direction on both sides, easy to install. Gate valves are symmetrical on both sides of the channel.
6, the structure of the length (the distance between the two connecting end of the shell) is small.
7, the form is simple, the structure length is short, the manufacture craft is good, the scope of application is wide.
8. The structure is compact, the valve is rigid, the passage is smooth, the flow resistance is small, the sealing surface is made of stainless steel and hard alloy, and the service life is long, the sealing is reliable, the operation is light and flexible.
shortcoming
Disadvantages: the sealing surface is easy to cause erosion and abrasion, maintenance is more difficult. Larger size, open requires a certain space, open and close for a long time. More complex structure.
Type of gate valve, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve and is divided into: single gate type, dual gate plate and the flexible gate type; parallel gate valve can be divided into single gate plate and dual gate plate. According to the screw position of the valve stem can be divided into two kinds of the bright and dark bar gate valve.
Structure characteristics: general valve market has long been used widespread leakage or rusting phenomenon, the company introduced European high-tech rubber and valve manufacturing technology to produce elastic seat seal gate valve, valve seal to overcome the generally poor, rust and other defects, flexible seat seal gate valve with flexible gate produce small quantities of elastic deformation of the compensation function to achieve good sealing effect, the valve with a switch to compact, reliable sealing, elastic memory is good, and the use of life and other significant advantages. Can be widely used for water, sewage, construction, petroleum, chemical industry, food, pharmaceutical, textile, electric power, shipbuilding, metallurgy, energy systems, a body of pipeline regulation and closure devices as.
