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R-408A is a retrofit solution for medium and low temperature refrigeration systems that are currently using R-502. R-408A should not be mixed with R-502 or used to top off the charge of an existing system operating on R-502. R-408A is not intended for use in new equipment.
R-22 is an HCFC refrigerant that is often used in air-conditioning equipment. To protect the Earth's protective ozone layer, the United States is phasing out R-22, along with other chemicals.
PRODUCT NAME: R-502 OTHER NAME:. Chlorodifluoromethane, Chloropentafluoroethane USE: Refrigerant Gas DISTRIBUTOR: National Refrigerants, Inc. EMERGENCY OVERVIEW: Colorless, volatile liquid with ethereal and faint sweetish odor.
Before its phaseout in 1995, it was used in low temperature refrigeration (the evaporator pressure stays out of vacuum down to -40°F). R-502 offered lower discharge temperature and improved capacity compared to R-22....Product Information. Part NumberProduct Description30R50230 LB. CYLINDER125R502125 LB. CYLINDER
R404A refrigerant is accepted as an alternative to R502 in the new equipment. It can be used also for charging of some systems operating on R502, such as commercial refrigeration equipment of big universal shops, refrigeration facilities of food industry factories, transport refrigeration facilities.
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Description. RS-44b (R453a) is the newest R22 drop-in replacement refrigerant in the U.S. market. RS-44b has been sold worldwide for the past 5 years, branded as RS-70 outside the US. It is the closest replacement to R22 that operates with very similar discharge pressure, cooling capacity and flow rate as R22.
Freon MP39 is an HCFC retrofit refrigerant for R-12 in stationary positive displacement air-conditioning and refrigeration systems such as walk-in coolers, beverage dispensers, vending machines, and supermarket systems. Field experience has shown that no oil change is needed in many unitary and close-coupled systems.
What are the best replacements for R404A? For cold rooms and other small to medium commercial refrigeration applications, R448A and R449A and R452A or R134a are excellent alternatives to R404A, with from 50 to 65% reduction in GWP.
Mixtures containing R22 are probably the most suitable refrigerants for the drop-in substitution of R502.
Both Suva® HP80 and Suva® 404A (HP62) are full-range R-502 replacements, with Suva® HP80 preferred for retrofitting of existing systems, and Suva® 404A (HP62) preferred for new equip- ment.

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