What is the reason why the pneumatic valve does not work after the nitrogen machine is turned on

1, nitrogen machine drive air source is not opened or opened too small;

2, the driving gas pressure is too low, the normal range is generally 0.4 ~ 0.6MPa;

3. There is dirt stuck in the valve of the nitrogen machine, or the valve pipeline is seriously vented;

4, the valve life has arrived, at this time need to replace the nitrogen machine pneumatic valve (life of about 6 years).