FEP (fluorinated ethylene propylene) is a tough, flexible copolymer of tetrafluoroethylene and hexafluoropropylene. It is often used for flexible tubing and fluid processing equipment when chemical resistance, high purity, and low stiffness are required. FEP has outstanding electrical properties and UV resistance.

The two columns on the PT chart give the liquid and vapor pressures at the listed temperatures. Single component refrigerants and azeotropic blends have bubble points and dew points equal to each other, and we simply call this the boiling point. When there is only one column on the PT chart, low glide blends would have very similar numbers in the two columns, and often the PT chart will only have ...

A single component refrigerant always had a "boiling point." Zeotropic blends change composition when they boil or condense, and therefore have a continuously changing boiling point. The most useful temperatures to know are where the boiling starts and ends. Bubble point and dew point are terms used in the chemical industry to define these two temperatures.Bubble point is the temperature where the...

There are several reasons for bubbles in the sight glass. If one of the traditional refrigerants showed vapor in the sight glass it often meant there wasn't enough liquid refrigerant being fed to the valve, and more refrigerant was added to the system.Blends could show flashing for the same reason, however, they can also flash when there is plenty of liquid in the receiver. Ironically, this liquid...

It depends. Studies were done a few years ago to show how higher glide blends behave during leakage and they showed significant fractionation, which affected the properties of the blend. When the system was topped off, the properties came back close to original. The cycle was repeated to see how many times the system could leak before topping off became a problem (the recommendation was not more t...

You can feed vapor, however, at any point in time the compressor will be seeing the wrong composition gas. At first the vapor will be rich in the higher pressure, higher capacity component. This will cause high discharge pressure and temperature, high motor amps, etc. As the cylinder empties, the compressor will see the lower capacity gas which is left behind, changing the operating conditions the...

In a cylinder, a zeotropic blend will have a different vapor composition sitting above the bulk of the liquid. If you remove this vapor, you will: 1) take the wrong composition refrigerant out of the cylinder, and 2) leave behind the wrong composition refrigerant for future use. Liquid must be removed from the cylinder in order to avoid this fractionation effect. Somewhere between the cylinder and...

To begin, HFCs (134a and 404a / 507) MUST have some of the mineral oil replaced with polyolester (POE). Most manufacturers recommend less than 5% residual mineral oil, although that is an arbitrary number and recent studies have show larger amounts of residual mineral oil will still work fine. Some blends contain hydrocarbons, which help with mineral oil circulation even though the HFC blend will ...

R600aR600ais a HFC and CFC free refrigerant, providing the most environmentally friendlyrefrigerant available. It is extremely energy efficient, andhas high cooling ability, low electricity waste.Properties： IndexUnitR600aChemical formula C4H10Molecular weightg/mol58.12Critical temperature℃134.98Critical pressureKPa3660Saturated liquid density (25℃)Kg/m3551Specific heat (25℃liquid)KJ/kg·k2.3...

R507R507is a colorless gas under ordinary temperature, and a colorless &transparent liquid under the pressure of itself, mixed by R143 and R125. It is the substitute for R502,mainly used in the low temperature refrigerating systems.Properties： UnitR507Chemical formula R-143/R-125Molecular weightg/mol98.86Melting point℃-46.7Critical temperature℃70.9Critical pressureMPa3.79Saturated liquid ...

R407CR407Cis a colorless gas under ordinary temperature, and a colorless &transparent liquid under the pressure ofitself, mixed by R32, R134aand R125.R407Cis the long-term substitute for R22, mainly used in the air conditioner and othernon-centrifugal refrigerating systemsProperties： UnitR407CChemical formula R-32/R-134a/R-125Molecular weightg/mol86.2Melting point℃-43.4Critical temperatu...

R410AR410ais a clorless gas under ordinary temperature, and a colorlss & TransparentLiquid under the pressure of itslf, mixed by HFC-32 and HFC-125. And it is thesubstitute for R22, mainly used in the air conditioners and other refrigeratigsystems.Properties： IndexUnitR410AChemical formula R-32/R-125Molecular weightg/mol72.58Boiling point℃-51.53Critical temperature℃72.13Critical pressureMPa4.93...

R404AR404Ais a colorless gas under ordinary temperature, and a colorless &transparent liquid under the pressure of itself, mixedby R125, R134a and R143. It is a long-term substitute for R502, mainly used inthe refrigerating systems of low & moderate temperature.Properties： UnitR404AChemical formula R-134a/R-125/R-32Molecular weightg/mol Melting point℃-46.1Critical temperature℃72.4Critical p...

R152aR152ais a colorless gas under ordinary temperature, and a colorless &transparent liquid under the pressure of itself, easily solube in oil but poorlyin water. It is mainly used as the important raw material forrefrigerants, aerosol propellants and synthesis of R142b. As the substitutiverefrigerant for CFC-12, it will be a long-term one and have absolutelyno bad effects against ozonosphere....

R134aR134ais internationally recognized as one of the main refrigerant working substancesto substitute CFC-12. It does not contain chlorine atom, gives no bad effectsagainst ozonosphere and has excellent safety performances, such asnon-toxicity, non-inflammability, non-explosive ability , non-pungency, andnon-corrosive ability. It is a colorless gas under ordinary temperature and acolorless & tr...

R125R125is a colorless gas under ordinary temperature and a colorless & transparentliquid under the pressure of itself, used as refrigerants, the vital partof mixed working substances to substitute R502&R22, and as flame-retardantsto substitute Halon-1211 & Halon-1301.Properties： IndexUnitR125Chemical formula CHF2CF3Molecular weightg/mol120.02Melting point℃-102.95Boiling point℃-48.45Specific gra...

R123R123is a colorless gas under ordinary temperature and a colorless & transparentliquid under the pressure of itself, used as refrigerant, the vital part ofblend working substances to substitute R11 and R113.Properties： IndexUnitR123Chemical formula CF3CH Cl2Molecular weightg/mol152.91Melting point℃ Boiling point℃27.6Specific gravity (25℃)g/cm31.458Vapor pressure (25℃)MPa Critical temperature℃...

R123R123is a colorless gas under ordinary temperature and a colorless & transparentliquid under the pressure of itself, used as refrigerant, the vital part ofblend working substances to substitute R11 and R113.Properties： IndexUnitR123Chemical formula CF3CH Cl2Molecular weightg/mol152.91Melting point℃ Boiling point℃27.6Specific gravity (25℃)g/cm31.458Vapor pressure (25℃)MPa Critical temperature℃...

R32R32is a colorless gas under ordinary temperature and a colorless & transparentliquid under the pressure of itself. It is mainly used as refrigerant which isthe vital part to substitute R22. R32 is also an important component ofblend refrigerant R407C and R410a. .Properties： IndexUnitR32Chemical formula CH2F2Molecular weightg/mol52.02Freezing point℃-136Boiling point℃-51.7Specific gravity (25℃ ...

R23R23is a high pressure liquefied gas, which was usually used as a refrigerant tosubstitute CFC-13. And it is also the ideal substitute for Halon with thequality of cleanness, low toxicity, and the excellent effect to fight fire.Properties： IndexUnitR23Chemical formula CHF3Molecular weightg/mol70.0Melting point℃-152.15Boiling point℃-82.2Specific gravity (25℃ liquid)g/m30.669Vapor pressure (25℃)...

R22R22is a colorless gas under ordinary temperature and a colorless & transparentliquid under the pressure of itself, Vnon-toxic & inflammable with theexcellent thermo-stability and chemical stability, unable to erode metals andit is a refrigerant for low temperature to ﹣80℃below. Used in reciprocating compressor, as refrigerant in industrial,commercial and household air-condition system; Also ...