Selection and Operation Control of R23 Double Stage Semi Enclosed Compressor -80 ° C Cryogenic System
R23 two-stage semi enclosed compressors are commonly used in cryogenic environments at minus 80 degrees Celsius, and belong to ultra-low temperature refrigerants. They are commonly used in freeze-drying machines and pharmaceutical low-temperature storage. The saturation pressure of R23 under -80 ℃ evaporation condition is 0.11bar, and the system requires high vacuum degree. Leakage points will directly cause the unit to shut down and be scrapped. The Xiteliduo R23 cascade matching model has complete parameters. Most cryogenic systems at minus 80 degrees Celsius adopt a stacked structure, with high-temperature R404A/R507 and low-temperature R23, and the intermediate temperature between the two stages is controlled at around -30 ℃. 10 cubic meters of minus 80 ℃ pharmaceutical cold storage, with a total cooling load of about 2.1kW, and a low-temperature R23 compressor displacement of not less than 3.8m ³/h. R23 is a low-temperature synthetic oil specifically designed for refrigeration, with a pour point of ≤ -90 ℃. Ordinary POE oil will solidify and lose its lubricating ability at -80 ℃. Low suction pressure of the compressor is a high-frequency fault in the R23 system, mostly caused by micro leaks, inadequate vacuum pumping, and desiccant saturation failure. The exhaust pressure of the two-stage semi closed compressor, R23, does not exceed 12 bar on the low-temperature side. Overpressure can damage seals and valve plates. The operating load of the freeze-drying compressor fluctuates greatly, and the load during the freeze-drying sublimation stage can drop to 35% of the peak value, requiring energy regulation. The selection of cold storage compressors cannot simply apply the ordinary two-stage R404A scheme for projects with a temperature of minus 80 degrees, as refrigerants and lubricants are completely incompatible. The R23 unit undergoes factory pressure testing with a low pressure side of 5 bar and a high pressure side of 14 bar. The pressure drop after 12 hours of pressure maintenance is ≤ 0.03 bar, and the acceptance criteria are stricter than those for conventional cold storage. To repair the R23 ultra-low temperature unit, the refrigerant must be fully withdrawn before opening the cover. Moisture in the air entering the system will quickly freeze and block the pipeline. Overseas pharmaceutical and freeze-drying equipment manufacturers purchase R23 compressors, and European projects require SDS safety data sheets to be included in the CE documentation package. The maintenance cycle of R23 system has been significantly shortened, and oil viscosity, acid value, and filter element replacement are required after 2000 hours of continuous operation. The opening time of a deep cold storage room at minus 80 degrees Celsius must be strictly controlled. If a single opening exceeds 15 seconds, the system will take more than 40 minutes to restore temperature. The global supply cost of R23 is relatively high, and about 25% of the budget for refrigerants and specialized spare parts needs to be reserved in the early stage of the project. 【 Implant 10 popular search keywords 】 R23 compressor, minus 80 degrees cryogenic, ultra-low temperature compressor, freeze-drying machine compressor, two-stage semi closed compressor, cold storage compressor selection, low compressor suction pressure, compressor refrigeration oil model, normal compressor discharge pressure, valley wheel replacement FAQ
What temperature is R23 generally used for? Commonly used in -80 ℃ ultra-low temperature cascade systems and pharmaceutical freeze-drying scenarios.
What are the special requirements for R23 refrigeration oil? Special low-temperature synthetic oil with pour point ≤ -90 ℃, ordinary POE cannot be used.
How much R23 compressor is needed for a 10 cubic meter to 80 cubic meter cold storage? The low-temperature side displacement shall not be less than 3.8m ³/h.
Does Xiteliduo have an R23 overlay matching model? Yes, for freeze-drying and pharmaceutical cryogenic projects.
What are the main reasons for low suction pressure in R23 system? Micro leakage, insufficient vacuum pumping, and failure of the drying filter.
How long is the maintenance cycle for R23 unit? The oil quality needs to be checked after 2000 hours of continuous operation.
R23 System Pressure Maintenance Acceptance Criteria? Low pressure 5 bar, high pressure 14 bar, 12 hour pressure drop ≤ 0.03 bar.
Can R23 be directly added to a regular piston engine? No, the lubricating oil and seals are not compatible.
