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- How to Choose PVDF Grades for ExtrusionJun 27,2025
HFC Refrigerant
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R417A is a hydrofluorocarbon (HFC) refrigerant that is commonly used as a replacement for older refrigerants like R22 in air conditioning and refrigeration systems. It is a blend of R125, R134A, and R600, designed to offer improved energy efficiency while being more environmentally friendly compared to traditional refrigerants. R417A is a non-ozone-depleting refrigerant and has a lower Global Warming Potential (GWP) compared to R22, making it a suitable choice for both residential and commercial applications.
R32 is a refrigerant that is gaining popularity as a replacement for older refrigerants like R22 and R410A. It is a single-component refrigerant that belongs to the family of hydrofluorocarbons (HFCs). R32 is known for its lower Global Warming Potential (GWP) compared to R410A, making it a more environmentally friendly option for air conditioning and refrigeration systems. It is highly efficient, and its low GWP makes it a preferred choice for modern HVAC systems, especially in residential and commercial applications.
R410A is a refrigerant mixture consisting of two components: R32 (Difluoromethane) and R125 (Pentafluoroethane). It was developed as a replacement for older refrigerants like R22, which have higher ozone depletion potential.
Refrigerant R134a, is a widely used hydrofluorocarbon (HFC) refrigerant. It has become the standard in various cooling applications, particularly in automotive air conditioning and HVAC systems, replacing older, ozone-depleting refrigerants like R12.
R507 is a hydrofluorocarbon(HFC) blend refrigerant, which also called mixed refrigerant R507.
R417a is a hydrofluorocarbon(HFC) blend refrigerant, which also called mixed refrigerant R417a.
R410a is a hydrofluorocarbon(HFC) blend refrigerant, which also called mixed refrigerant R410a.
Refrigerant R407c is a blend of R134a, R125 and R32 with ratio 52%, 25% and 23%.
R507 is an azeotropic blend of R-125 and R-143a intended for low and medium temperature refrigeration systems.
R410a is a blend gas of R-32 and R-125, which is a wide use in replacement for R22.
R404a is a blend of R-125, R-143a, and R-134a intended for low & medium temperature refrigeration system where R-502 was used.
Refrigerant R134a is mainly used in auto A/C compressor system and some commercial A/C refrigerant system.
Refrigerant R134a is mainly used in auto A/C compressor system and some commercial A/C refrigerant system.
HFC-125 substitutes CFC-502 & HCFC-22, and as flame-retardants to substitute Halon-1211 & Halon-1301.
Refrigerant R134a is mainly used in auto A/C compressor system and some commercial A/C refrigerant system.
Refrigerant Gas FAQ
- If I am putting in the whole refrigerant bottle, can I feed vapor then?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 other way.
It will take some time for the "locally fractionated" gas to get mixed back into the original composition. Besides, if you need to charge the whole bottle, it's faster to put it in as a liquid. - If a blend leaks out of the system, will I need to pull the remaining charge and recharge, or can IIt 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 than five). These studies were done on containers at rest, which promotes the worst case of fractionation.
Another study was performed recently on a system running full time, then cycling normally (2/3 on, 1/3 off), which found that the blend did not fractionate when the refrigerant is moving around inside, and not much fractionation occurred when cycling. Low-glide blends didn't show much fractionation in any case.
What this means is that running systems found to be low on charge have probably not fractionated the blend much, and can be repaired and recharged directly. If the system has been off for a long period (more than a day) and found to have leaked (worst case is about half the charge), it's best to pull what's left and charge with fresh, unless very little is gone, or very little is left. Low-glide blends won't cause any fractionation-related problems. - Why do bubbles appear in the sight glass when I use a blend? Does this mean I don't have enough refrThere 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 in the receiver could be causing the problem, particularly when the equipment is in a hot environment. Blends will come out of the condenser slightly subcooled — at a temperature below the saturated temperature of the blend at the existing high side pressure.
Yet when the blend sits in the receiver, it can "locally fractionate," or change composition slightly by shifting one of the components into the vapor space of the receiver. This will effectively produce a saturated liquid in the receiver, at the same pressure you had before, which flashes when it hits the expanded volume of the sight glass. In most cases these bubbles will collapse when the blend gets back into the tubing which feeds the valve, and the system will operate just fine.
Check other system parameters such as pressures, superheat and amperage to confirm whether you have the right charge. Don't rely solely on the sight glass. - Why are there two columns on a PT chart, and how are they used?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 one column as well for them.
How a two-column PT chart is used is straightforward. Most times you're interested in knowing the saturated temperature of the refrigerant at the system pressure, so you can compare it to a measurement you're making on the system (for example, to check a superheat or subcool setting). Simply keep track of the condition of the refrigerant where you're measuring, and cross-reference the same side of the PT chart.
Superheat measurements check the line temperature of superheated refrigerant vapor coming out of the evaporator versus the saturated vapor temperature, so you would use the vapor side of the PT chart.
Subcool measurements check the temperature of subcooled liquid refrigerant coming out of the condenser versus the saturated liquid temperature, so you would use the liquid side of the PT chart. - What is FEP material?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.
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Fotech is a professional supplier and manufacturer of refrigerants and fluorine polymers over 20 years, distributing environmental friendly refrigerant, clean agent fire extinguishing agent, blowing agent, cleaning agent, and high performance new chemical materials...more>