Pneumatic valve is widely used in pipe pneumatic valve

the pneumatic valve is widely used in pipeline is relative pneumatic valves, cut off the main channel, the role of the media. Does not apply to adjust the medium flow rate, but according to dry down level to determine the size of the flow ( If use the size of the elastic pneumatic valve sealing gate of fire. ） Compared with other brake pneumatic valve, pressure, temperature, application requirements, such as diameter to wide. According to the internal structure of the pneumatic valve can be divided into: single wedge type gate type, flexible door type, double plate, parallel to the door. According to the stem can be divided into different brackets: rising stem gate pneumatic valve and non-rising stem gate. Main advantages are: the performance of pneumatic valve, pneumatic valve fluid resistance small, because it is straight type pneumatic valve pneumatic brake valve body, do not change the flow direction of medium, the pneumatic valve flow resistance is smaller than the other. , sealed performance is better than by the pneumatic valve, pneumatic valve gate more effort. Applicability is wide and in addition to steam, oil and other media, but also contains solid particles of the medium and viscosity, also make the pneumatic valve and the low vacuum system object completely the use of the valve. The pneumatic valve is a kind of double flow pneumatic valve, from the media flow limit, apply it to the direction of the media stream may change the pipeline, and is easy to install. Main disadvantage is that: the performance of pneumatic valves, high dimension, shape design, long since closed. Pneumatic valve plate opened, need to improve on the cavity pneumatic valve, pneumatic valve plate closed oil needs to fall into pneumatic valve seat, so as to open and close the pneumatic valve plate of the journey, for a long time. , pneumatic valve plate and seat sealing surface of the pneumatic valves open and close the two exist in the process of friction, so easy to scratch affect the sealing performance and service life, convenient maintenance sealing surface. Several different kinds of pneumatic valve structure performance comparison: ( ） Wedge a single ram pneumatic valve, more flexible structure, a simple brake pneumatic valve b, at a higher temperature, sealed performance is not flexible or double plate pneumatic valve pneumatic brake valve is good. C, for easy to coke in high temperature. （ ） Flexible pneumatic valve gate, it is a special form of single pneumatic wedge gate valve. Compared with the pneumatic wedge gate valve under high temperature, sealed performance is good, the door is not easy to be heated card to death; B, for steam, the high temperature oil and gas medium, and apply to the scene switching frequency. 吗? Does not apply to medium coke and easy. （ ） Brake of a pneumatic valve, pneumatic wedge gate valve sealing performance than that with tilt Angle and the pneumatic valve seat sealing surface is not very accurate, better still has good sealing performance. B, door seal, will be the replacement of the metal pad can be used at the bottom of the ball center, generally have no welding and sealing surface grinding, the door is the door not advantage of flexibility. C, suitable for steam and hot oil and gas medium, and apply to the scene switching frequency. E, does not apply to medium coke and easy. （ ） A parallel brake pneumatic valve, pneumatic valve seal than other forms of poor performance. B, reduce the temperature and pressure is applied to the media. 吗? , the door and pneumatic valve seat sealing surface processing is simple, more than any other form of pneumatic valve repair surface.
rising stem gate pneumatic valve and the differences between non-rising stem: pneumatic valve stem up and down up and down through the opening and closing door drive, drive the spiral stalk stem at the top of the brake bracket of pneumatic valve, pneumatic valve so that you can judge the position of the pneumatic valve opening and closing of the position of the door, a transmission line is also convenient for daily lubrication and maintenance, and is not affected by fluid corrosion defect is larger space for installation requirements. In the body of the drive screw non-rising stem pneumatic valve, pneumatic valve stem stents, which saves space, reduce the overall height of pneumatic valve. Will need to explicitly open and closed position, and can be installed in the opening and closing ceremonies of the large pneumatic side at the bottom of the drain valve cover ( Such as underground non-rising stem gate) , groove, such as to limit the space, or a large dust content. Pneumatic valve can also be according to the different material, different pressure and different seals, different connectors, different types of pneumatic valve.