Pneumatic Valve Operating Mechanism

1. The opening and closing direction of pneumatic valves should always be clockwise.
2. Due to the frequent manual opening and closing of pneumatic valves in the pipeline network, the number of opening and closing revolutions should not be too large, even for large diameter valves, it should be within 200-600 revolutions.
3. For the convenience of one person's opening and closing operation, the maximum opening and closing torque should be 240N-m under pipeline pressure conditions.
4. The opening and closing operating end of pneumatic valves should be square tenon, with standardized dimensions and facing the ground, so that people can operate directly from the ground. Valves with wheels are not suitable for underground pipeline networks.
5. Display panel for the degree of opening and closing of pneumatic valves
① The scale lines for the degree of opening and closing of pneumatic valves should be cast on the gearbox cover or the shell of the display panel after changing direction, all facing the ground, and the scale lines should be brushed with fluorescent powder to show eye-catching;
② The material of the indicator dial needle can be made of stainless steel plate under good management, otherwise it is painted steel plate, and aluminum sheet should not be used for production;
③ The indicator dial needle is eye-catching and firmly fixed. Once the opening and closing adjustment is accurate, it should be locked with rivets.
6. If the pneumatic valve is buried deep and the distance between the operating mechanism and display panel from the ground is ≥ 1.5m, an extension rod facility should be installed and firmly fixed to facilitate observation and operation from the ground. That is to say, the valve opening and closing operation in the pipeline network is not suitable for downhole operations.
④ If the packing needs to be replaced, the design of pneumatic valves should consider measures to replace it under water pressure.