the working principle of pneumatic cut-off valve, pneumatic valve globe valve with compressed air as power source, it USES a remote control, manual or automatic trigger the main control room of the action, the inlet and exhaust solenoid valve work, provide actuators and discharge of compressed air. Compressed air ACTS on the piston or diaphragm, to overcome the friction of the valve function and flexibility, the spring on the valve stem to press down ( For air valve) Or promotion ( For the air shutoff valve) Gas gate valve rod, drives the valve core and up or down to open or close the valve. When gas valve is missing, no compressed air in the driving head, according to the requirement of the system, the safety of the valve will be in the fully open or closed position. Power plant using compressed air, gas supply pressure is commonly 4 x 9 bar. Before entering the valve, filter and purify the air, and then use the pressure reducing valve to reduce pressure. Pressure regulation can be achieved by adjusting installed on the top of the relief valve adjusting screw. Before the adjustment shall be loosen the shield. Pneumatic cut-off valve installation instructions: pneumatic globe valves are normally used for closed, open the one-way flow of gas and liquid pipeline, its structure is longer than gate valves, relatively short length. When strong corrosion medium, should choose the low and high cut-off valve, the intake in the high or medium pressure should be upset when opening and closing the valve stem, often in order to avoid the medium thrust and cause stem bending. The flow resistance is greater than the other valve pneumatic globe valve. In use process should pay attention to air pressure and the pressure of the valve stem and corrosion problems. Pneumatic cut-off valve is not applicable to high particle concentration, high viscosity, easy to coking of the medium.

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