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.

As the long-term substitute for R502, R507 used mainly in the low temperature refrigeranting systems.

1.Pressure and vacuum gauge shift function. 2.Build-in 82 refrigerants according to U.S.A.NIST standarcl refrigerants pressure and temperature relationship database. 3.Real-time vacuum pressure test and percent indicate. 4.Low power indicate.Batteries life:30H.9V.

R407C is a mixture of hydrofluorocarbons used as a refrigerant. It is a zeotropic blend of R-32, R-125, and R-134a (20/40/40). Applications include residential and commercial air conditioning systems, non-flooded evaporator chillers, and some commercial refrigeration systems. Since R-407C has similar properties to R-22, it is possible (with modifications) to use it in the same equipment designed for R-22 today.

R-406A is a mixture of three components chlorodifluoromethane (R-22), isobutane (R-600a) and chlorodifluoroethane (R-142b) in the ratio 55/4/41. R406A was designed as a replacement for R-12, which is compatible with the typical mineral oil lubricants used in R-12 systems. It has a range of boiling points which may increase the effectiveness of the heat transfer elements in refrigeration equipment. As it contains R-22, its future is limited due to eventual phase-out.

Chlorodifluoromethane (HCFC-22), a colorless gas at room temperature, is a colorless, non - toxic, non-flammable and transparent liquid under the pressure created by itself. It has excellent thermal and chemical stabilities and no corrosivity to metals. Its main applications include refrigerant(-80℃grade), raw material for PTFE production and intermediate for Halon 1211 production.

HFC-134a is used as refrigerant in automobile air-conditioning, household and commercial refrigerant applications. It can also be used as aerosol, flame retardan, and blowing agent in pharmaceutical, agro-chemical, cosmetics and cleaning sectors.

R410A refrigerant is used in new residential and commercial air conditioning systems, heat pumps, dehumidifiers and small chillers. R-410A is also being considered in some medium temperature refrigeration applications.