After the tank is cooled, the dry pump of Freeze Dry Machine is preheated for 15 minutes. At the same time, the vacuum pump nitrogen protection valve is opened, the vacuum line purge valve is opened, the vacuum pump unit cooling water valve (GV80) is turned on, the preheating time is turned off, the vacuum pump nitrogen protection valve is closed, and the vacuum line is closed. Purge the valve and open the small butterfly valve.

Dry pump of Freeze Dry Machine start: judge the temperature of the back box is lower than -45 degrees, set the holding time of the back box to the time, and the dry pump is preheated for 15 minutes. Open the small butterfly valve and start pre-vacuum. When the warm-up time is up, turn off the vacuum pump nitrogen protection valve and close the vacuum line purge valve.

During the re-pressing tamping stage: the small butterfly valve is closed, and the dry air supply valve of the intake main valve can be opened when the vacuum pump is turned on.

Dry pump of Freeze Dry Machine stop:

1.Close the small butterfly valve, vacuum pump off command, judge the small butterfly valve off signal in place, open the vacuum pump nitrogen protection valve, open the vacuum line purge valve (the vacuum line purge valve is equipped with the device), take the vacuum pump off command as the timing starting point after 15min pump Turn off the pump and close the valve.

2.The small butterfly valve is not closed, the vacuum pump closes the command, immediately closes the small butterfly valve, the dry pump stops, then, closes the small butterfly valve, the vacuum pump closes the command, judges that the small butterfly valve closes the signal, opens the vacuum pump nitrogen protection valve, and opens the vacuum line purge valve (vacuum tube) Whether the road purge valve is equipped with the device, the vacuum pump off command is used as the starting point for the 15min pump and the pump is closed.

3.During the automatic operation of freezing, when the power is turned off and then called, the vacuum pump is turned on immediately. The vacuum line purges the valve and remains powered down. Free automatic power off and then call, pop-up dialog box is preheated, YES preheat 15 minutes, NO directly open. If you would like to purchase freeze dry machine from gf-machine.com , please contact Vegetable Drying Machine Manufacturer whenever you want.