Pneumatic valve operating mechanism

1, pneumatic valve operation when the opening and closing direction, should be closed clockwise. 2, because of the pipe network of pneumatic valves, often manual opening and closing, opening and closing revolutions should not be too much, that is, large diameter valves should also be in 200-600 revolutions. 3. In order to facilitate the opening and closing operation of a person, the maximum opening and closing torque should be 240N-m under the condition of plumber's pressure. 4, pneumatic valve opening and closing operation end should be square tenon, and size standardization, and facing the ground, so that people can directly operate from the ground. Valves with roulette wheels are not suitable for underground piping. 5. Display panel of opening and closing degree of pneumatic valve (1) pneumatic valve opening and closing degree of the scale line, should be cast in the gearbox cover or after the conversion of direction of the display plate on the shell, all face to the ground, the scale line brush on phosphor, to show eye-catching; (2) indicator dial needle material in good management of the available stainless steel plate, otherwise for paint steel plate, do not use aluminum; (3) indicating disc needle eye-catching, fixed firm, once the opening and closing adjustment is accurate, should be locked with the rivet. 6. If the pneumatic valve is buried deep and the distance between the operating mechanism and the display panel is ≥1.5m from the ground, the extension rod should be provided and fixed firmly so that people can observe and operate from the ground. That is to say, the valve in the pipe network open and close operation, not down the well.