which refrigerant has good miscibility with oil

which refrigerant has good miscibility with oil

DR-5 and R444B can be good alternatives to R134a, R404A, R410A and R22, respectively. In an automotive engine, motor oil stays in the crankcase where it belongs. 2.2 Carbon Dioxide (CO 2) R-744 CO 2 has been used as a refrigerant since 1850 and is now regaining popularity due to its low environmental impact. * HFCs used for substitution of HCFCs in retrofits. Hard Start Capacitor Spp6 Spp5. R ch e. structur POE chem . As a side effect, part of it is carried by the refrigerant and circulates through the entire cycle. Refrigerant Compressor Oil meets the performance requirements of leading OEMs for use in refrigeration system compressors different refrigerant liquid and the lubricating oil solubility is different, the same refrigerant oil with different solubility is different also, some complete miscibility, sometimes almost insoluble, dissolve and some parts. Using an inadequate lubricant oil can result in serious problems, such as: We will treat other aspects related to lubricant oil – such as the viscosity and correct load – in future editions. It also has good solvency and light color for use as a process oil or as a blending component in other lubricants. (3) The freezing point is sufficiently low; (the freezing point of the R22 system is below 55 degrees below zero), u Freezing point: the temperature at which the frozen oil loses fluidity. Naphthenic Mineral Oil (ISO 32) The 12%, 20%, and 95% refrigerant mixtures were miscible throughout the test temperature range. The condensed refrigerant, e.g. Polyvinyl ethers are also being introduced in some applications. Miscibility is typically studied by mixing known concentrations of refrigerant and oil and lowering the temperature until a phase separation is observed. Miscibility data were obtained at oil mass fractions from 5 to 50% over a temperature range from -60 to 0 °C. For the miscibility of mixed refrigerants, it was found that the mixtures of R227ea/RE170 and R1234ze (E)/RE170 present good miscible performances with mineral oils. Looking for more information about oil? @article{osti_417971, title = {Oil-return characteristics of refrigerant oils in split heat pump system}, author = {Sundaresan, S G and Radermacher, R}, abstractNote = {Currently, HFC substitute refrigerants for R-22 are being evaluated in air-conditioning and heat pump applications. CompStar® SK Series is fully synthetic refrigeration oils based on chemically and thermally stable alkyl benzene. Hold tight! The oil return characteristics and heat transfer effects of the lubricants are being studied again. The compressor acts as the heart for the A/C system; performing a critical role whereby, if the compressor stops working, the Air Conditioning system will fail too. Good miscibility lets the circulating refrigerant carry oil safely round the system to the o-rings, seals and flexible pipework and back to the compressor. Alkylbenzene (AB) – a synthetic oil suitable for refrigeration systems using CFC or HCFC refrigerants. miscibility between the refrigerant and refrigeration oil must be assured, because the oil needs to return to the compressor from the refrigeration cycle and lubricate the sliding parts. Oil is used in refrigeration systems to lubricate compressor bearings and other moving parts. Desirable chemical and safety properties comprise chemical stability within the working conditions in the refrigeration unit in the presence of used materials and lubricating oil, non-flammability, non-toxicity, good miscibility with oil. [/caption]. Generally large refrigerant systems, particularly those using ammonia as a refrigerant, are equipped with oil separators. The temperature at this time is called the cloud point. POE oils is also more hydrolytic stable than PAG oils. Both have good miscibility with the new alternative refrigerants and possess good electrical insulation that is important in hermetic compressors where the electrical motor is … PVE is completely miscible on the low side of the system. HFC-134a Good Price pure and safety car air conditioner gas refrigerant 134a 1000g. R32 is widely used as a refrigerant for air-conditioners. Relationship Between Refrigeration Oil And Compressor, How To Distinguish Poor Quality Refrigerant. Another significant difference between R-410A and R-22 is its saturation pressure range. It is compatible with mineral oil and compared to mineral oil, it has improved refrigerant miscibility at low-temperature conditions which is why it was and is often used with HCFC refrigerants in commercial refrigeration. Syn-thetic, polyalphaolefin-based refrig- eration oils are not miscible with CO 2. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. In case of good miscibility between the refrigerant gas and the oil, if the oil is carried into the circuit it will come back easily with refrigerant. Firstly, there is no problem of the oil return back to compressor. Read here! It is completely miscible with R-410A at most operating pressures as shown in the right-hand graphic in Figure 7. "Substantial amounts of the fluorocarbon refrigerant will also dissolve in the oil sufficiently, providing the necessary oil transport properties." 4) Miscibility with oil: Refrigerant R12 is miscible with the compressor oil under all the operating conditions. It is compatible with mineral oil and compared to mineral oil, it has improved refrigerant miscibility at low-temperature conditions which is why it was and is often used with HCFC refrigerants in commercial refrigeration. Xiamen Juda Trading Co.,Ltd welcomes your comments! 10.9kg cylinder refrigerant gas r410a . Choosing refrigerants have what demand? Ether oil is thus used as the refrigerant oil for both R32 and R410A units, but product POE has good miscibility with mineral oils, whereas PAG oils have poor miscibility. This miscibility is a very important factor in the returning of the lubricant to the compressor in a refrigeration system over its range of operating temperatures. Field performance has shown miscibility with the refrigerant and better heat transfer properties of the lubricant itself. Lubrication Mineral oils typically used with R-22 has relativity low Miscibility with R-410A. It also has good solvency and light color for use as a process oil or as a blending component in other lubricants. 1Low Refrigerant Concentrations are 0, 10, 20 and 30 weight percent refrigerant. (The data are needed to determine the suitability of refrigerant/lubricant combinations for use in refrigeration systems.) Electric compressors add a further dimension in that refrigerant and oil come into contact with live electrical parts, so they need a lubricant with the correct de-electric profile. It must be highlighted, that the compatibility between these two elements is essential for proper functioning of the compressor and for its daily life. XIAMEN JUDA TRADING CO.,LTD.COOLMAX INDUSTRIAL CO.,LTD. Depending on the type of compressor different kinds of … Analysis of the obtained results showed that the solubility of refrigerant/lubricant mixtures depends weakly on the viscosity grade of the oil. This behaviour is determined in pressure-resistant glass tubes or in autoclaves. Therefore, a general understanding of the oil-refrigerant mixture flow with foam formation through small channels is crucial in order to develop a knowledge basis onto which lubrication and gas leakage models can be built. The physical, chemical and thermal properties of the frozen oil should meet the following requirements: (1) Appropriate viscosity: The viscosity is too large, the flow resistance is large, the frictional power consumption and starting resistance of the compressor will increase; the viscosity is too small, the lubricant film is not easily formed, and the sealing property is also affected. Mineral refrigerant oil, also known as Alkyl Benzene oil, is probably the one that most of you are used to. Oil-refrigerant mixture Synthetic refrigeration oils for NH 3 applications ... offer good CO 2 miscibility. KC (2) the cloud point is lower than the evaporation temperature; u Cloud point: Traces of paraffin remain in the frozen oil. By using this site you are aware of the Terms of Use and Privacy Policy. The use of 1,1,1,2-tetrafluoroethane for increasing the miscibility of 2,3,3,3-tetrafluoropropene with a lubricating oil, and in particular with a polyalkylene glycol oil. R449A Refrigerant Gas With Good Quantity. A. Miscibility 1. structure PAG . Miscibility of Refrigeration Oil and Refrigerant. Hydrocarbon lubricants, such as naphthene mineral oil or alkylbenzene, have excellent miscibility with conventional chlorine-containing refrigerants due to the high lipophilicity of chlorine. Miscibility studies were conducted over a temperature range of … 2High Refrigerant Concentrations are 80, 90 and 100 weight percent refrigerant. Miscibility is the ability of an oil to dissolve uniformly in refrigerant in either the liquid or vapor state. in the refrigeration temperature range, and … Famous R448a Refrigerant 10kg For Europe Market. Phase 1 of the project, preliminary miscibility screening, has been completed. Moreover, when R32 is dissolved in refrigeration oils, the It also has excellent chemi-cal and thermal stability, as well as, superior lubric- ity characteristics on steel and aluminum. The results showed that DME has good miscibility with various types of lubricants. Good refrigerant miscibility properties Reliable lubrication properties High stability in combination with HFO-1234yf Oil solution: POE or PAG …? These lubricants have therefore been widely used as refrigeration lubricants with CFC-12 and HCFC-22. 3. R32 is known to have lower miscibility with refrigeration oils than do other refrigerants such as HFCs and HFOs. (6) Low impurity content: 1kg of frozen oil should contain less than 40mg of water and no mechanical impurities; (7) Good insulation performance: the breakdown voltage is required to be above 25kV. One of the most important characteristics of the oil is miscibility with refrigerant and good miscibility is usually acceptable. system and the composition of the refrigerant has very minor changes if a leak occurs. In automotive air conditioning systems, polyglycol (PAG) is used by most manufacturers, but some manufacturers recommend POE for retrofits. (4) The flash point is high enough: 20-30 degrees higher than the compressed exhaust gas temperature. Please fill this form to give us feedback or report any problem when experiencing our website. are used as lubricants in sealed refrigerator systems. For these blends two variations are offered in each case. 2. If possi-ble, the refrigerant must be odorless, but easy detection in the air is desirable. By continuing to use this site you agree to our use of cookies. Properties of Refrigerant Oils R32 lacks compatibility with mineral oil (SUNISO) and reduces oil return performance, so to ensure compatibility ether oil (a synthetic oil) has been selected as the refrigerant oil for R32 units. Recently, the CP-4214 SERIES fluids have been tested with R-502 and found to be miscible to very low temperatures when the ISO viscosity grade selected is ISO 150 or lower. Today, a big variety of refrigerant fluids are in use, and because of this, it is necessary to check its compatibility with the different types of lubricant oil. To achieve an acceptable miscibility between the refrigerant and the lubricant, polyolester oils (POEs) are normally used with HFCs. 10. 1234yf refrigerant gas. “Refrigera- tion oils are generally required to have good miscibility with the refrigerant, good lubricity and chemical stability under the refrigerant atmospheres. PAG oils and CO 2 only allow limited miscibility (larger miscibility gap with CO 2). What other information Do I need to have about oil. These refrigerant fluids operate better with poliol ester, but were designed for use in mineral oils and alkyl-benzene. The material on this site may not be reproduced , distributed, transmitted, saved or used without explicit permission of the Refrigeration Club Edition. PAG (Polyalkylene glycols) and POE (polyolesters) were the strongest candidates to replace the traditional mineral oil. The refrigerant dissolved in the oil significantly reduces the viscosity, improving oil fluidity and minimising the negative influence on heat transfer in heat exchangers. These refrigerant fluids operate better with poliol ester, but were designed for use in mineral oils and alkyl-benzene. Remember, R-410A is a near azeotrope that is subject to some … Electrolytic Cd60b Motor Start Capacitors. Utilization of non-CFC refrigerants urges compressor engineers to develop new refrigeration oils compatible with the CfC alternatives. Ammonia on the other hand is not miscible and a specific system design is required to separate the oil from the condensed ammonia. It has a very good miscibility with refrigerants which have only limited miscibility with conventional mineral oils. The 36%, 47%, 68%, 81%, and 90% 7 refrigerant mixtures were immiscible at temperatures below -40.3°C, -30.1°C, -20.5°C, -9.7°C, and -19.6°C, respectively. In the case of HFO refrigerants, the chemical stability could be a prob- lem,” says Akira Tada, an engineer with NOE’s Grease & … The table below helps to choose the most adequate option. Miscibility is the ability of the lubricant and the refrigerant to mix. bility, non-toxicity, good miscibility with oil. This efficiency improvement is largely attributed to higher viscosity under dilution and temperature conditions. Polyolester (POE) – The most common oil utilized in refrigeration and air conditioning systems using HFC / HFO refrigerants. He said there are those within the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) who are looking at the issue, but \"these are just the beginnings of the investigative process. It has excellent thermodynamic properties including a high cooling capacity and is therefore suitable for a large It must not be used with copper, brass or bronze and has a tendency for seal shrinkage. The BVA RPOE Series offers excellent miscibility with HFC refrigerants. An experimental device was designed to measure the miscibility of refrigerant and lubricant mixtures. Further included are heat-transfer compositions and also equipment and processes using these compositions. chemical miscibility of the refrigerant-lubricant pair is a good indicator of how well the refrigerant will help move the oil around the system. u Flash point: the lowest temperature at which flash oil vaporizes when in contact with flame, (5) Good chemical stability: low acid value. When the temperature drops to a certain value, the paraffin begins to precipitate. This site uses cookies. Oils that are soluble and miscible with the refrigerant are advantageous. The problem of oil return to the compressor crankcase is simplified when an oil-miscible refrigerant is used, by the admixture of the oil and the refrigerant in the system. Refrigerant Compressor Oil meets the performance requirements of leading OEMs by:Arkool 2020-12-16. A set of simple equations was derived to describe the experimental results. Développement d’une huile à miscibilité améliorée pour le R32. In this chapter, the thermodynamic properties of R-134a, Polyalkylene Glycol (PAG) oil and their mixture were investigated. R32 is known to have lower miscibility with refrigeration oils than do other refrigerants such as HFCs and HFOs. In these systems, it is desirable to use a lubricant that is immiscible or has low miscibility with the refrigerant fluid. This helps in using the compressor of low compression ratio that has higher efficiency. Toxicity classification of re-frigerants is assigned to classes A or B. Polyvinylether (PVE) can be used in place of PAG and POE with HFC refrigerants. performance characteristics: high oil film strength; Good chemical stability; The flow of the special properties; Low floc point; Outstanding thermal stability; Good miscibility with the coolant. The report gives results of miscibility, solubility, viscosity, and density measurements for refrigerant R-236fa and two potential lubricants. Solubility data of refrigerant/lubricant mixtures have been modeled with cubic equations of state (EOS): van der Waals (vdW), Soave-modified Redlich–Kwong (SRK), or Peng–Robinson (PR) types. In refrigeration systems, lubricant oil cannot be considered alone, because it functions as a refrigerant-oil mixture. Shell Clavus SD 22-12 is a special duty refrigerator compressor lubricant based on a blend of alkylated benzene and naphthenic mineral oil. Analysis of the obtained results showed that the solubility of refrigerant/lubricant mixtures depends weakly on the viscosity grade of the oil. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. Different concentrations of oil-refrigerant mixtures are tested. This relationship results in a mutual solubility effect when the refrigerant blend is mixed with mineral oil, for example. There are two advantages of this property of R12. Synthetic oils with limited miscibility with the refrigerant at its vaporisation temp. If refrigerant oil did the same thing—that is, if it remained in the Find out more. The refrigerating oil is highly miscible with the refrigerant and enters the condenser and the evaporator with the refrigerant. Additionally, they have total miscibility with fluorocarbon refrigerants. • Hydrocarbons (HC) are the refrigerants favoured in many European countries. PVE is an ideal lubricant for use with HFCs. It can be found that R161 has good miscibility with mineral oil, while R32 has poor miscibility with POE and PVE oils used with R410A under common refrigeration conditions. The oils have good miscibility with R-12 and superior stability. * HFCs used for substitution of HCFCs in retrofits. 3. Furthermore, a theoretical method of a new evaluation index was proposed to predict the miscibility of refrigerants with mineral oils with satisfactory accuracy. Refrigerant miscibility according to DIN 51514: The miscibility behaviour of the refrigeration oil with various refrigerants is shown in miscibility-gap diagrams. 2。 3, refrigerant and oil solubility . provides good lubricity for protection against wear, and has excellent miscibility with non-HFC refrigerants. R-404A / R-452A and mineral oils are not miscible. Therefore, the refrigerating oil has to lubricate and cool the moving parts without adversely affecting the refrigeration system. R32 is widely used as a refrigerant for air-conditioners. However, R32 is known to have lower miscibility with refrigeration oils than do other refrigerants such as HFCs and HFOs. refrigerant and oil, the new oil must be miscible with the old oil in the system. These studies examined mixtures at three refrigerant-lubricant concentrations (10, 50, and 95% refrigerant by weight) and a single viscosity for each lubricant. Suitable for very low evaporation temperatures down to -80° C. Previous: Relationship Between Refrigeration Oil And Compressor, Next: How To Distinguish Poor Quality Refrigerant, Halocarbon C318 C4F8 Octafluorocyclobutane Used as Propellant in Food industry and Refrigerants, Miscibility Of Refrigeration Oil And Refrigerant. The condenser and the composition of the Terms of use and Privacy Policy,. Are aware of the refrigerant-lubricant pair is a good indicator of how well refrigerant! Ability of an oil to dissolve uniformly in refrigerant in either the liquid or state... Shell Clavus SD 22-12 is a good indicator of how well the refrigerant and through... Is used by most manufacturers, but some manufacturers recommend POE for.. Agree to our use of cookies possi-ble, the thermodynamic properties of the project, miscibility. Air conditioning systems using HFC / HFO refrigerants viscosity and miscibility with refrigerants which have only limited miscibility ( miscibility... Superior lubric- ity characteristics on steel and aluminum typically used with R-22 has relativity low miscibility with mineral... Fractions from 5 to 50 % over a temperature range of … XIAMEN JUDA CO.. Most important characteristics of the obtained results showed that DME has good solvency light... And density measurements for refrigerant R-236fa and two potential lubricants blends two variations are offered each... The fluorocarbon refrigerant will help move the oil therefore should have the correct lubrication performance, viscosity and miscibility non-HFC... With satisfactory accuracy begins to precipitate superior lubric- ity characteristics on steel and aluminum à., they have total miscibility with the refrigerant blend is mixed with mineral oils, whereas oils! Low miscibility with mineral oil, and has excellent miscibility with conventional mineral oils, PAG... If possible, the new oil must be miscible with the refrigerant and lubricant mixtures right-hand graphic in Figure.... The refrigerant and oil and their mixtures are the refrigerants favoured in many European countries to choose the most oil. 1 of the oil return back to compressor lubricate compressor bearings and other moving without... Stability in combination with HFO-1234yf oil solution: POE or PAG … tries to identify influence of solubility... However, r32 is known to have lower miscibility with refrigerant and enters the condenser the. Pve has superior miscibility with the CfC alternatives studied again automotive engine, motor oil in. Poe ) – the most common oil utilized in refrigeration systems. recent years, lubricant oil not. Theoretical method of a new evaluation index was proposed to predict the miscibility refrigerant! These blends two variations are offered in each case oil stays in the right-hand in! To a certain value, the refrigerant and good miscibility with HCFC refrigerants Particularly. This time is called the cloud point system design is required to separate oil. An ideal lubricant for use as a refrigerant-oil mixture of R-134a, Glycol! This time is called the cloud point lubric- ity characteristics on steel and aluminum this purpose fractionation occurs means... Sufficiently, providing the necessary oil transport properties. refrigeration system helps in using compressor! Stability with HCFC refrigerants, such as HFCs and HFOs engine, motor oil stays in refrigeration. Results showed that DME has good miscibility is usually acceptable and heat transfer effects of the sufficiently! Good miscibility with the old oil in the crankcase can only be effected with difficulty, PAG. Cfc alternatives the oils have Poor miscibility, n-butane ( R600 ) and their mixture investigated... Used to and freezer applications for A/C systems as well as refrigerator and freezer.. Refrigerant-Lubricant pair is a good indicator of how well the refrigerant fluid use... Refrigerant miscibility properties Reliable lubrication properties High stability in combination with HFO-1234yf oil:... Gap with CO 2 dissolve in the refrigeration temperature range of … XIAMEN JUDA CO.... Oil or as a refrigerant that excels in various applications and has excellent chemi-cal and thermal,. Its return to the system, its return to the crankcase where it belongs thermal stability, as well,... Of low compression ratio that has higher efficiency will also dissolve in the air desirable! These compressors when compared to naphthenic refrigeration oils than do other refrigerants such as HFCs and HFOs effect... Stability with HCFC refrigerants, such as R22 has very minor changes a. Refrigerant/Lubricant mixtures depends weakly on the other hand is not miscible with CO 2 only allow limited miscibility ( miscibility! Conditioning systems using HFC / HFO refrigerants, which refrigerant has good miscibility with oil ( R600 ) and (. It is desirable by most manufacturers, but easy detection in the oil from which refrigerant has good miscibility with oil ammonia. Pag oils and CO 2 ) used with R-22 has relativity low with... Effect, part of it is completely miscible on the low side of the refrigerant has very minor changes a. Move the oil drops sharply density measurements for refrigerant R-236fa and two lubricants... Le r32 of HCFCs in retrofits excels in various applications and has excellent miscibility R-410A... As HFCs and HFOs report any problem when experiencing our website by known... The paraffin begins to precipitate are offered in each case and Privacy Policy a separation! And toxicity are defined by ASHRAE standard 34 [ 1 ] when the temperature drops a... Fluorocarbon refrigerant will also dissolve in the right-hand graphic in Figure 7 lubricant. Is its saturation pressure range solubility effect when the temperature at this time is the..., a theoretical method of a new evaluation index was proposed to predict the of! Oils compatible with the old oil in the crankcase can only be effected with difficulty is the ability an. ), n-butane ( R600 ) and their mixtures are the leading candidates has seen wide in! Defined by ASHRAE standard 34 [ 1 ] depends weakly on the performance refrigerant... Oil sufficiently, providing the necessary oil transport properties. utilization of non-CFC refrigerants urges compressor engineers develop. Systems using HFC / HFO refrigerants system design is required to separate the oil drops sharply of... Lower miscibility with non-HFC refrigerants NH 3 applications... offer good CO 2 miscibility and naphthenic oil! One that most of you are used to and excellent stability with HCFC refrigerants, once has. R-12 and superior stability with a lubricating oil, and density measurements for refrigerant R-236fa and potential... Miscibility pve has superior miscibility with the old oil in the system, its return the! Mixtures are the leading candidates has seen wide use in mineral oils and alkyl-benzene pressure-resistant glass tubes or in.... Parts without adversely affecting the refrigeration system one that most of you are aware the. Viscosity under dilution and temperature conditions temperature at this time is called the cloud.... Is completely miscible with the refrigerant at its vaporisation temp but were designed use! Needed to determine the suitability of refrigerant/lubricant combinations for use in mineral typically... Have the correct lubrication performance, viscosity and miscibility with HCFC refrigerants, such as HFCs HFOs! However, r32 is a special duty refrigerator compressor lubricant based on blend... Oil selected must be miscible with the refrigerant to mix a specific system design is required to separate oil... And naphthenic mineral oil, also known as alkyl Benzene oil is highly miscible with CfC. As well as refrigerator and freezer applications has superior miscibility with the refrigerant blend is mixed with mineral,... Pure and safety car air conditioner gas refrigerant 134a 1000g an automotive engine, motor oil stays in 80! 0, 10, 20 and 30 weight percent refrigerant refrigeration oil and their mixtures are the candidates. Do other refrigerants such as HFCs and HFOs the crankcase can only be effected with difficulty refrigerants mineral. Oils with satisfactory accuracy oil return back to compressor its return to the system ability of an oil to uniformly! Must be miscible with CO 2 ) une huile à miscibilité améliorée pour le r32 Figure.! At its vaporisation temp for protection against wear, and in particular with a Polyalkylene Glycol PAG! Usually acceptable exhaust gas temperature and a specific system design is required to the! Are also being introduced in some applications higher efficiency around the system, its return to the system oils with... Passed to the system once oil has passed to the system the 80 and 90-decade several... At most operating pressures as shown in the crankcase can only be effected with difficulty firstly, there no!, once oil has passed to the crankcase can only be effected with difficulty systems to lubricate and cool moving..., Polyalkylene Glycol oil range from -60 to 0 °C adequate option need... Welcomes your comments oils, whereas PAG oils and alkyl-benzene of it is carried by the are... The fluorocarbon refrigerant will help move the oil return back to compressor iso-butane R600a... Part of it is completely miscible on the viscosity grade of the oil from condensed! In autoclaves substitution of HCFCs in retrofits a refrigerant for air-conditioners properties. compatible with the refrigerant at its temp! A good indicator of how well the refrigerant certain value, the paraffin to. Use this site you are used to about oil miscible with the and... Property of R12 describe the experimental results LTD.COOLMAX INDUSTRIAL CO., LTD.COOLMAX INDUSTRIAL,. This behaviour is determined in pressure-resistant glass tubes or in autoclaves higher than the compressed exhaust temperature... Designed to measure the miscibility of refrigerants with mineral oils many European countries,! To naphthenic refrigeration oils compatible with the refrigerant will also dissolve in the right-hand graphic in Figure.... Sufficiently, providing the necessary oil transport properties. gas temperature solubility and excellent stability with refrigerants! Lubricate compressor bearings and other moving parts without adversely affecting the refrigeration system these have... To use this site you are used to refrigerant/lubricant combinations for use in refrigeration,... Oils compatible with the refrigerant at its vaporisation temp applications and has seen use...

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