PSA nitrogen machine belongs to the on-site nitrogen system, it has the characteristics of low use cost, fast nitrogen production, simple maintenance, etc., plays a pivotal role in modern industrial production, psa nitrogen machine in the chemical industry, oil and gas industry, electronics industry, food industry, coal industry, pharmaceutical industry, cable industry, metal heat treatment, transportation and storage are widely used.

According to the user's different operation mode of the nitrogen machine, the original design of the nitrogen machine, and the awareness of the maintenance of the nitrogen machine, the nitrogen machine is prone to produce a lot of failures. The following Suzhou 晠 Licheng Gas Equipment Co., Ltd. analyzes the common failure phenomena of the nitrogen machine:

One of the towers is not completely vented
Cause of failure:
1. The check valve leaks
2. The blowback valve is opened too large

Treatment method:
1. Replace the check valve or inner sealing ring
2. Adjust the opening of the blowback valve

Second, the purity decreases
Cause of failure:
1. The adsorption pressure is too high (>0.8Mpa)
2. The adsorption pressure is too low (<0.6Mpa)
3. The adsorption pressure is unstable
4. The air source contains too much water and oil
5. The inlet pressure rises too fast
6. Air leakage occurs at the outlet interface
7. Carbon molecular sieve poisoning failure or powder

Treatment method:
1. Reduce intake pressure
2. Increase the intake pressure
3. Add a storage tank to the air intake
4. Install an oil-water separator before inlet
5. Adjust the inlet regulating valve to reduce the intake volume.
6. Remove and reinsert
7. Replace carbon molecular sieve

Three, the nitrogen machine does not work
Cause of failure:
1. The power indicator is off.
2. The power plug or socket is disconnected.

Treatment method:
1. Check whether the fuse is normal (the fuse is located at the lower end of the power cable and the socket of the nitrogen generator). The safety can be removed by gently picking outwards with a flat-head screwdriver. There are two insurance policies, one in use and one in reserve, to be replaced if necessary.
2. Check the plug or socket for power.

Fourth, the pressure rises slowly.
Cause of failure:
1. Insufficient air intake.
2. The air leakage of the interface is serious.
3. The check valve leaks or is blocked.

Treatment method:
1. Increase the intake flow rate.
2. Remove and reinsert it.
3. Check and clean the check valve.

Five, a tower pressure has been zero.
Cause of failure:
1. The computer controller doesn't work.
2. The valve does not work, the solenoid coil may be burned out or the valve core is stuck.
3. The pressure gauge may be faulty.

Treatment method:
1. Check and debug.
2. Gently touch the iron to check whether the fastening screw at the end of the solenoid valve has magnetic attraction. If the coil is proved to be broken, the spool may be necrotic. Turn off the power, open the valve group, take out the valve group, wipe the dust of the valve core and valve center with a clean soft cloth, and then reinstall it. Replace the coil if it burns out.
3. Check whether the pressure gauge is replaced.

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