Wuxi Guanya Refrigeration Technology co., ltd

How To Vacuum The Ultra-Low Temperature Freezer Refrigeration System?

LNEYA ultra-low temperature freezer indoor and outdoor connection has been completed, observe the oil pump oil mark indication to see if there is enough oil, and then start the vacuum pump to see if it is normal. Then unscrew the large valve back cover nut and the fluorine injection nozzle nut, connect the pressure gauge low pressure, connect one end of the thimble to the refrigerant nozzle side, open the low pressure meter switch, vacuum, and quickly show that the vacuum is completed. It may be the vacuum of the yellow tube that the gauge is not open.

The specific time for vacuuming in the ultra-low temperature freezer is about 20-30min. When the pressure gauge pointer is ≤-0.1MPa, then close the pressure gauge low pressure valve, then close the vacuum pump, hold the pressure, observe the pressure gauge pointer for 5 minutes, and see if the pointer rotates. If the system pressure leak is greater than -0.08Mpa, the system has a leak.

If the LNEYA ultra-low temperature freezer compartment leaks, it is necessary to check the possible leak points and repeat the above-mentioned operation vacuuming process, open the small valve and remove the meter. Special attention: After confirming that there is no leakage point, open the small valve spool a little. When the pressure (low pressure) reaches 0.05MPa, close the small valve and quickly remove the pressure gauge (very critical point). Note: This step is to make the system become positive pressure, avoiding the air entering again during the unloading process, and the vacuum is invalid.

Special attention should be paid when opening the LNEYA ultra-low temperature freezer line: first open the small valve completely, and then tighten the valve back nut immediately after opening the large valve completely. Need to pay attention: Be sure to open the valve plug completely, so as not to affect the performance of the ultra-low temperature freezer in the later stage.

Of course, after vacuuming, pay attention to leak detection. Specifically, check each interface and shut-off valve of the internal and external machines first, and apply soapy water to the suspicious points with a sponge block. Each stay should be no less than 3 minutes. If bubbles are formed, There is a leak. At the same time, note that the soapy water should not be too thin, otherwise it will affect the inspection. In summer, the leak should be detected in the stop state, and in the winter, the leak should be detected during the heating operation.

After the vacuum of the ultra-low temperature freezer refrigeration system, users are advised to pay attention to the leakage of the system to avoid the presence of leaks.
Related News
  • 2020 CPhI China The 20th World Pharmaceutical Raw Materials China Exhibition

    2020 CPhI China The 20th World Pharmaceutical Raw Materials China Exhibition

    December 17, 2020December 16-18 Booth number: W5P08 Shanghai New International Expo Center (Pudong)view
  • 483Meet Your Dream Equipment for Distillate CBD Extraction

    483Meet Your Dream Equipment for Distillate CBD Extraction

    February 6, 2021If you need equipment to distill CBD, you need to scrutinize your choices, as the equipment can vary in its features and design. When you use equipment that produces a CBD distillate, you want to seek out a system made by a manufacturer that provides proven and reliable products. You should also work with a business that can train you on the use of the equipment you buy.view
  • Won the second place in the 2022

    Won the second place in the 2022

    December 5, 2022On November 18, 2022, it was sponsored by the Jiangsu Provincial Association for Science and Technology, the Provincial Taiwan Affairs Office, the Provincial Department of Industry and Information Tec...view
  • LNEYA won the title of Jiangsu Provincial Gazelle Enterprise in 2022

    LNEYA won the title of Jiangsu Provincial Gazelle Enterprise in 2022

    January 13, 2023Recently, the Jiangsu Provincial Productivity Promotion Center officially released the evaluation results of the unicorn enterprises and gazelle enterprises in 2022 in Jiangsu and the high-tech zone, ...view
  • Approaching LNEYA 5 Main Products

    Approaching LNEYA 5 Main Products

    January 11, 2018Industrial Chiller:Industrial Chiller varies from dynamic temp. Special Chiller:Special Chiller consist of Multi-reactor chiller (TCU).Environmental Chamber:The test object is connected to a testing adapter. Industrial Freezer:Industrial freezer consist oview
  • The Analysis Of Ultra Low Freezer'S Price

    The Analysis Of Ultra Low Freezer'S Price

    July 4, 2018What are the characteristics and functions of ultra low freezer: 1. Ultra low freezer can prevent the precision of machine equipment from being influenced by the change of oil temperature in the proce...view
Related Products
  • SLJ -110℃~-150℃

    SLJ -110℃~-150℃

    January 11, 2018Temperature ranges from - 5 ~ - 150 ℃, can meet different temperature; Adopt environmental protection refrigerants; Famous brand semi-closed piston compressor, semi-closed bipolar piston compressor, semi-hermetic screw compressor, main brand are BOCK.view
  • Single Fluid Heat Transfer System SR

    Single Fluid Heat Transfer System SR

    April 10, 2018Working temperature range from -25℃to 200℃, other temperature range need to set to the widest temperature range(-50℃to 250℃) Centralized control of 2~20 reactors, each reactor's and jacket temperature can be set independently. One system control multipleview
  • Reactor Temperature System ZLF

    Reactor Temperature System ZLF

    April 10, 2018A set of cooling heat exchanger, heat exchanger, through proportional adjusting valve control cold heat into the heat exchanger, then through the uniform medium input to the reactor jacketed to do heat exchange and temp. Control, system has inside expansiview
  • LT -45℃~30℃

    LT -45℃~30℃

    April 10, 2018Low Temperature Cooling Chiller LT model: LT-5018N,LT-5040N,LT-5062N,LT-5090N,LT-50A1N,LT-50A2N;view
  • TES -45℃~250℃

    TES -45℃~250℃

    February 28, 2019-45℃~+200℃ 2.5kW~25kW ±0.3℃view
  • TES  -85℃~200℃

    TES -85℃~200℃

    February 28, 2019Temperature control range:-85 ° C ~ 200 ° CPower range:2.5kW~25kWTemperature control accuracy:±0.3°CModelTES-8525WTES-8555WTES-85A10WTES-85A15WTES-85A25WTemp. Range-85℃~200℃-85℃~200℃-85℃~200℃-85℃~200℃-85℃~200℃Heating P...view
products
Contact US
Tel: + 86 18751545184
E-mail: sales@cnzlj.com
Add: No.203, Hongyun Road, Hongshan Street, Optoelectronics Park, Xinwu District, Wuxi City, Jiangsu Province, China
code chat