The sound of the freeze dryer vacuum pump is very strange, and the vacuum level cannot be pumped up

Because you use too little, the oil or other parts inside the vacuum pump have not been used for a long time, and the inside has emulsified, which has an impact on the body, and it is recommended to need maintenance, if the noise is very loud, it may need to be repaired.

Try cleaning and changing the oil! It is estimated that it is a relatively poor direct connection pump! Consult Chengdu Chaomai Machinery for details.

Is there a place where the instrument is not well sealed and the pipe is broken? Is the noise caused damage to the machine by dirty oil?

You can find their professional maintenance personnel to repair the equipment.

It is very likely that the dried sample contains organic solvents or volatile acids, which causes the vacuum level to drop We also have a freeze dryer here and there are often problems There is a chance that we can ** hope to adopt Thank you!

After a while, how long is this period of time, not for a long time, then there is a leak, you eliminate it piece by piece to see if it is a leak

If the vacuum degree cannot be maintained, there is a leakage.

It may be that the rotary vane of the vacuum pump is worn out and needs to be replaced, you can find us.

Check if there are any leaks If not, it is an internal problem of the machine.

Troubleshooting of vacuum pumps.

Reference: ** Oh to and Oh Oh to point times Oh Mo slash.

There's something in there that you can look at.

Yes, you can get an automatic device, use an electrical contact vacuum meter, bring a distribution box, and add a gas tank.

This operation is possible, but only if the vacuum level of the vacuum pump is high enough and the leakage rate of the system is low enough. Otherwise, it will increase the drying time, plus the intermittent switching of the vacuum pump, which is not good for the vacuum pump, and does not reduce much energy consumption, which is not very suitable.

This will increase the number of motor starts, and it will also have an impact on the life of the motor.

Consideration should be given to whether condensate will be sucked back into the dryer when the vacuum pump is automatically stopped.

Check the system for leaks:

1. Check that the water discharge door on the steam side of the condenser is closed and does not leak;

2. Check that the low-pressure cylinder exhaust safety door is complete and there is no suction;

3. Check that the water level gauge of the vacuum system does not break or leak;

4. Check that the vacuum destruction door is closed and does not leak the mouth;

5. Check whether the water level of the low-pressure heater under negative pressure is normal, and whether the ditch door is tight.

6. Check whether there is air leakage in the place where the vacuum exhaust pipe is connected with the cylinder, where the leakage air drops when the load decreases, and the vacuum rises slightly after the load increases.

7. Check whether the gravity return water of the speed control feed pump is a condenser, if the return water is small and the water seal bag cannot be sealed, the gravity return water of the feed pump should be poured into the trench.

8. Check whether the water seal, pipe, flange or weld of the valve of the water ring vacuum pump system is not tight, especially the pipeline and valve mouth from the expansion box or boiler starting separator to the condenser.

The above is some knowledge about water ring vacuum pumps, you can refer to it.

The vacuum degree of the vacuum drying oven suddenly cannot be pumped to the highest, indicating that the machine is faulty, and the after-sales master will come to repair it as soon as possible.

Suzhou Hisiyuan.

The vacuum pump of the freeze dryer does not pump water vapor.

As the pressure decreases, the average free path increases by a factor of 105, which significantly accelerates the rate of sublimation, and the water molecules that fly out rarely change the aspect of the slide, forming a directional vapor flow from the wax front.

It depends on what vacuum pump you're using. There are many reasons ...

1. The motor overcurrent electric control cabinet is overload protected.

2. The motor burned out.

3. The motor cable line is faulty.

Anyway, the main reason is around the motor first, it is difficult to say whether the pump is bad or not, and the automatic shutdown must have something to do with the motor.

Or burn the resistance infinitely, or there is a problem with the line, a multimeter solves the problem.

Whether your vacuum control system is automatic and manual or fully automatic, see if there is a problem with the control, whether the set value of the vacuum degree has changed or there is a problem with the PLC.

Never opened it after it stopped? Or is it not operational for a short time after a shutdown?

The overload burns the motor, check it out.