Professional Manufacturer of Nitrogen Generator & Oxygen Generator

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Nitrogen generator operation specification process

 Start sequence

1. Check the nitrogen pipeline system valve (open and close)
a. Whether the outlet valve of the air compressor is normally opened;
b. Air buffer tank outlet valve is open,
c. Open the inlet valve of the freeze dryer.
d. Open the inlet valve of the gas storage tank normally;
e. Open the exhaust valve (unqualified exhaust port) and nitrogen outlet valve (qualified air supply port) of the outlet purity control system of the nitrogen process tank;
f. Open the inlet valve of the nitrogen storage tank.
2. Power on the system
3. Start the freeze dryer and let it work for 5 minutes;
4. Restart the air compressor;
5. When the pressure of the air process tank reaches 0.6Mpa, switch on the power supply of the nitrogen generator, and the nitrogen purity meter will alarm when it appears;
6. When the pressure of the air treatment tank reaches above 0.7Mpa, press the "Run" button on the nitrogen generator to start operation; Left tower works, right tower waits, and vice versa.
7. Adjust the sampling regulation flow rate on the nitrogen generator bellows to 1.0~1.5;
8. Nitrogen purity gauge rises from 79%, nitrogen process tank outlet purity control system exhaust valve automatically opens (unqualified exhaust port), unqualified nitrogen is discharged from the exhaust port;
9. When the purity of nitrogen reaches the set value (such as 99.9%, or 999, 99%), the alarm will stop (there will be a 30-second lag setting), and the pneumatic exhaust valve will be closed. After 15 seconds, the pneumatic valve of nitrogen outlet will be opened, and the qualified nitrogen will be pumped into the nitrogen storage tank (there is a one-way valve at the outlet of nitrogen generator).

 Stop sequence

1. Press the Stop button on the nitrogen generator. Turn off the power supply after the pressure of tower A and tower B decreases first and then rises.
2. Stop the air compressor.
3. Turn off the freeze dryer
4. Close the air buffer tank outlet valve
5. Close the exhaust valve and nitrogen outlet valve of the purity control system at the rear of the nitrogen process tank
6. Close the inlet valve of the nitrogen tank.

regular inspection

1. Check the oil temperature of the air compressor through the screen of the air compressor. The general temperature is below 95~100℃,
2. Check the oil level of the air compressor through the oil window of the air compressor room. Under normal circumstances, the window oil level is above 30%,
3. Clean or clean the filter screen and radiator at the entrance of the air compressor regularly (once a week).
4. The condensed water in the air buffer tank should be drained regularly, 1-2 times every 8 hours.
5. When the freeze dryer starts, it is normal to touch the inlet and outlet of compressed air of the freeze dryer. The air inlet temperature is too high, and the air outlet temperature is too low. It feels cold.
6. When the freeze dryer is closed again, the evaporation pressure gauge cannot be 0. If the value is 0, there is no refrigerant in the dryer and maintenance is required.
7. Clean the heat sink of the freeze dryer regularly every month
8. Check the automatic drain valve of the freeze dryer every shift, and check whether the electronic drain port can drain water regularly; The drain pipes and drainpipes of freeze dryer should not freeze in winter.
9. Exhaust and blow the buffer tank and the manual blow valve of the three filters every shift (every 2-4 hours). Check buffer tank bottom drain valve weekly for drainage.
10. Observe whether the pressure of air buffer tank, freeze dryer, air process tank, adsorption tower A, adsorption tower B, nitrogen process tank and nitrogen storage tank is within the normal range every shift (once every 2 ~ 4 hours).
11. Winter maintenance use.
a. Indoor heating should be turned on in winter, and the indoor temperature should not be lower than 15℃.
b. Check whether the bottom blow valve of buffer gas tank, refrigerator and filter (4) can exhaust normally and prevent ice blockage every shift.
c. The blow valve at the bottom of the buffer gas tank, refrigerator, dryer and filter (4) should be manually discharged in each shift to ensure that there is no water.
d. Before and after stopping or starting, check whether the buffer gas tank, refrigerator and filter (4) discharge is normal.
e. If the buffer gas tank, refrigerator and filter need to be closed for a long time, the stored water should be manually drained to prevent freezing at low temperature.


1. After 2000 hours, replace the oil filter and air filter of the air compressor and add oil;
2. After 4000 hours, replace the oil filter, air filter and oil separator of the air compressor, refueling or oil change;
3. Replace the three-stage filter element every 3000-4000 hours.
4. Replace the activated carbon in the oil remover every 5000 to 6000 hours.
5. Oxygen batteries are generally replaced every 1.5 years.

nitrogen generator filter element replacement steps

1. Cut off the air source and release the pressure between filters.
2. Screw out the lower barrel of the filter.
3. Unscrew the old filter element.
4. Wipe the inside of the filter and cylinder. Do not leave any foreign matter inside.
5. Replace the filter element, pay attention to the O-ring on the upper end of the filter element, and apply some grease.
6. Record the filter element replacement date.
7. When replacing the filter element, be sure to use the same type and specification as the filter element. Do not install the filter element incorrectly.
8. It is forbidden to replace the used filter element with a higher level filter element or reuse it.

activated carbon replacement procedures

1. Cut off the air source and release the pressure inside the activated carbon cylinder.
2. Loosen the loose knot (or flange) on the activated carbon cylinder;
3. Remove the fixing bolt between the top cover and the carbon tank (small membrane nitrogen generator) by rotating it counterclockwise
4. Take out the magnetic ball, sieve plate and press cloth in turn;
5. Pour out the original activated carbon particles and clean the carbon tank;
6. The new activated carbon particles should be filled and enriched,
7. Install the accessories in sequence and tighten the top cover. Pay attention to whether the flange sealing ring is intact. If it is damaged, replace it in time.
9. After the carbon tank is installed, pay attention to the loose knot (or flange) at the outlet end, do not connect it first. Plug the end of the outlet with a white towel or cloth. Start the nitrogen generator, air compressor, freeze dryer for 30 minutes, and then check whether there is toner or black spot on the white towel or white cloth; Wash for another 10 minutes, if any. After confirmation, tighten loose knot and check for air leakage.
10. Warning: After replacing the activated carbon, the activated carbon tank should be cleaned for a long time. The air flow needs to be expelled from the activated carbon outlet. Direct air supply to the nitrogen generator is not allowed.

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