Pneumatic regulating valve is to take compressed air as power source, take cylinder as actuator, and drive valve with the aid of accessories such as electrical valve positioner, converter, solenoid valve and holding valve, realize the switch quantity or proportional regulation, and receive control signal from industrial automation control system to complete various process parameters such as flow, pressure, temperature and so on. The characteristics of pneumatic control valve are simple control, quick reaction, and safety in nature, and no additional explosion-proof measures are required.
Do you know the installation principle of pneumatic regulating valve?
(1) The installation position of pneumatic regulating valve is required to be a certain height from the ground, and there should be some space left between the upper and lower parts of the valve for the disassembly and repair of the valve. For the regulating valve with pneumatic valve positioner and handwheel, it is necessary to ensure the convenience of operation, observation and adjustment.
(2) The regulating valve shall be installed on the horizontal pipe and vertical to the pipeline. Generally, it shall be supported under the valve to ensure stability and reliability. In special cases, when the regulating valve is required to be installed horizontally on the vertical pipe, the regulating valve shall also be supported (except for small caliber regulating valve). During installation, avoid additional stress to the regulating valve).
(3) The operating environment temperature of the regulating valve shall be no more than 95% 95% and 95% respectively at the relative humidity of (-30 ~ + 60).
(4) The front and rear position of the regulating valve shall have straight pipe section, with a length of not less than 10 times of pipe diameter (10d), so as to avoid the short straight pipe section of the valve and affect the flow characteristics.
(5) The diameter of regulating valve is different from that of process pipe, and reducer shall be used for connection. When installing small caliber regulating valve, screw connection can be used. The direction arrow of the fluid on the valve body shall be consistent with the direction of the fluid.
(6) To set the bypass pipe. The purpose is to facilitate switching or manual operation, and the regulating valve can be repaired without stopping.
(7) Before installation, the regulating valve shall thoroughly remove foreign matters in the pipeline, such as dirt, welding slag, etc.