Pneumatic valve operating mechanism: 1 Pneumatic valve opening and closing direction of operation, should be closed clockwise. 2 due to the pneumatic valve in the pipe network, often manual opening and closing, opening and closing speed should not be too much, that is, large-diameter valves should also be within 200-600 turn. 3 In order to facilitate a person's opening and closing operations, under plumbing conditions, the maximum opening and closing torque should be 240N-m. 4 Pneumatic valve opening and closing operation end should be square tenon, and size standardization, and facing the ground, so that people from the ground can be directly manipulated. Valves with wheels are not suitable for underground pipe networks. 5 Pneumatic valve opening and closing of the display plate ①Pneumatic valve opening and closing of the scale line should be cast in the gearbox cover or switch the direction of the display after the shell, all toward the ground, the scale brush phosphor to show Eye-catching; ② indicates that the material of the needle plate can be used in the case of better management of stainless steel plate, otherwise painted steel, do not use aluminum production; ③ indicating needle needle eye-catching, fixed firmly, once the opening and closing adjustment is accurate, should Rivet lock. 6 If the pneumatic valve is deeply buried, the operating mechanism and the display panel should be provided with extension rod facilities when the distance to the ground is ≥1.5m, and should be fixed firmly for people to observe and operate from the ground. In other words, pipe network valve opening and closing operation, should not go down to work.
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