Pneumatic control valve is the compressed air as the power source to the cylinder as the actuator, and with the help of electrical valve positioners, converters, solenoid valves, retention valves and other accessories to drive the valve to achieve the switch or the proportion of regulation, the receiving industry Automatic control system to complete the control signal conditioning pipeline media: flow, pressure, temperature and other process parameters. Pneumatic control valve is characterized by simple control, rapid response, and intrinsically safe, without the need to take another explosion-proof measures. So, pneumatic control valve installation principles have? (1) Pneumatic control valve installation position, from the ground requires a certain high valve, the upper and lower to leave a certain space, degree, the valve up and down to leave some space for valve disassembly and repair. Disassembly and repair. For the control valve equipped with pneumatic valve positioner and handwheel, operation, observation and adjustment must be guaranteed. (2) The control valve should be installed in the horizontal pipe, and the pipe down from top to bottom generally to be supported under the valve to ensure a solid and reliable. Straight, generally under the valve to be supported to ensure a solid and reliable. For special occasions, special occasions, the need for regulating the level of the valve installed in the vertical pipe, the valve should also be supported (on the road, the valve should also be supported (except for small-caliber control valve.) Installation When to avoid to adjust the valve to bring additional stress). (3) Operating temperature of regulating valve should be within (-30 ~ 60) (-30 ~ 60) (-30 ~ 60) Relative humidity not greater than 95% 95% ℃, relative humidity not greater than 95%. (4) There should be a straight pipe before and after the control valve position, before and after the valve straight pipe valve should have a straight pipe before and after the position of the segment length of not less than 10 times the pipe diameter (10D), 10 times the pipe diameter) The length of the pipe is not less than 10 times the pipe diameter (10D) to prevent the straight pipe section of the valve from affecting the flow characteristics. (5) control valve diameter and process pipe is not the same, should be used to connect different-diameter pipe. In the small-diameter control valve installation, available thread connection. Tube connection. In the small-diameter control valve installation, available thread connection. The fluid direction arrow on the body should be in the same direction as the fluid. The fluid direction arrow on the body should be in the same direction as the fluid. To set the bypass pipe. (6) to set the bypass pipe. The purpose is to facilitate the switch or manual operation, the valve can be overhaul without stopping the case. The valve can be overhauled without stopping. (7) The control valve should be thoroughly cleaned before installation of foreign body within the pipeline, such as dirt, welding slag and so on.
Transmission Line Steel Tubular Tower
Our steel poles are made from quality sheet through bending,
forming, automatic welding and hot galvanization. We can reach one-run
machining length of 14m and can bend sheet of thickness up to 45mm. We
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reach rank-II welding quality. We
have got 500kV Transmission Line Tubular Tower Quality Certificate from Power
Industry Steel Tower Qualified Inspection & Test Center from 2009
year.
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Jiangsu Xinjinlei Steel Industry Co., Ltd. , https://www.jinleisteeltower.com