1. A serious failure occurred in the circulation pump of the freeze dryer
Answer : The more common fault of the freeze dryer circulating pump is that the module enters the water and burns the module. The more serious the motor may burn out. To prevent condensate from entering the module, a short circuit is caused . The module is usually coated with 704 sealant to prevent water from entering. In addition, we keep the entire circulating pump warm and protect it, and the condensate will be less.
Downstream freeze dryer technicians suggest that two circulating pumps should be operated in turn. It is best not to run one pump all the time. One batch of medicine can be used to run one unit, and the other batch can run another one. Sex is much smaller.
2 , leaking vacuum
   Answer : There are many reasons for the vacuum leak of the freeze dryer. Many of the problems have been mentioned before. The problem that this customer has is mainly due to the vacuum leakage caused by the looseness of the header flange bolts. Due to thermal expansion and contraction during refrigeration and steam sterilization, the bolts are loose and the seal is not pressed tightly, resulting in vacuum leakage. Downstream freeze dryer technicians advise users to check frequently during the normal use, check more, and find problems early to avoid some problems.
3 , the freeze dryer has multiple pipeline leaks, the pipeline welding quality is not good, easy to leak
A: freeze-drying machine cooling system leaks, in front of several users also mentioned, there are a lot of factors leak. The most important thing is to minimize the vibration under the existing conditions, and add some vibration-damping brackets to better avoid this phenomenon.
4 , vacuum equipment is small
A : The problem with the vacuum equipment of the freeze dryer is that we design the configuration according to the design requirements and the reference product price, according to the requirements of the contract, and basically satisfy the use.
5 , the freeze dryer hydraulic system drop and lift adjustment is not accurate
Answer : The adjustment of the rise and fall of the hydraulic system is mainly controlled by adjusting the relief valve. The relief valve rotates clockwise at a slower speed and counterclockwise.
6, the high-pressure cooling system lyophilizer high, line leak
   Answer : The high pressure of the refrigeration system is likely due to the leakage of the low pressure pipeline and the inhalation of air into the pipeline, resulting in high pressure and high refrigeration system. The leakage of the low-pressure pipe is mainly due to the looseness of the connecting nut at both ends of the expansion valve, as well as the weakened parts of some welded parts and copper pipes. These parts cause leakage due to vibration, jitter or other factors after the machine has been used for a long time. Downstream freeze dryer technicians advise customers to pay attention to these parts when they are used normally, check frequently, find early solutions, and do not affect production.
7 , the circulation pump module is broken
A : The circulator pump module of the freeze dryer is broken. The most common module is water. Now using 704 sealant and heat treatment, it is recommended to use a circulating pump in turn. If it is a quality problem of the module itself, it has to be replaced by the manufacturer.
Ningbo Shuangjia Instrument Co., Ltd. Address: No. 9 South Road, Xuejia Industrial Zone, Yinzhou District, Ningbo, China Tel: Fax: 36599653
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