Operation method of pneumatic valve

1. The opening and closing direction of pneumatic valve shall be closed clockwise.

2. Because the pneumatic valves in the pipe network are often opened and closed manually, the opening and closing revolutions should not be too much, even the valves with large diameters should be within 200-600 revolutions.

3. In order to facilitate one person's opening and closing operation, the maximum opening and closing torque should be 240N-m under pipeline pressure.

4. The opening and closing operation end of pneumatic valve should be square tenon, standardized in size and facing the ground, so that people can operate directly from the ground. Valves with disc are not suitable for underground pipe network.

5. Pneumatic valve opening and closing degree display panel

① The scale line of the opening and closing degree of the pneumatic valve should be cast on the gearbox cover or the shell of the reversed display panel, all facing the ground, and the scale line should be painted with fluorescent powder to show eye-catching;

② Stainless steel plate can be used for indicating dial hands if they are well managed; otherwise, it is painted steel plate, not aluminum skin;

(3) The indicating 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 deeply, and the distance between the operating mechanism and the display panel is ≥ 1.5m from the ground, telescopic rod facilities shall be provided and fixed firmly, so that people can observe and operate from the ground. In other words, the valves in the pipe network are not suitable for underground operation.