Oils for refrigerant R22

BITZER compact screw compressors for R22 are charged with a high-quality complex ester oil. It significantly exceeds the requirements of DIN 51503, Part 1, for refrigeration compressor oils with respect to water content and total acid number (TAN). It mixes well with R22 and is therefore especially suitable for operation with this substance.

Charakterisation and application range

Bitzer oil B320SH for refrigerant R22 in compact screw compressors. For application limits see also Bitzer Software.

B320SH

oil type

complex ester

Designation on compressor

– –

application range

condensing temperature

CSH: .. 60 °C
CSW: .. 50 °C

evaporation temperature

+12,5 .. -15 °C

discharge gas temperature

60 .. max. 120 °C

Material safety data sheets

Apart from this document, please observe the material safety data sheet (MSDS) for the respective oil. It contains information on toxicity, handling, personal protective equipment and disposal of the oil. Material safety data sheets for all Bitzer oils are available on request.

Technical data

Overview of the technical data of BITZER refrigeration compressor oils.
The density can be linearly interpolated between the specified values.

Oil

Type

Flash-point (°C)

Pour point (°C)

Density (g/ml)

Kinematic viscosity (cSt)

Specific heat capacity (kJ/kg*K)

Thermal conductivity (W/m*K)

at -30°C

at 15°C

at 100°C

at 20°C

at 40°C

at 100°C

at 40°C

at 100°C

at 40°C

at 100°C

B320SH/ B320SX

complex ester

258

-42

1.052

1.016

0.958

993

310

32

1.68

1.85

0.12

0.12

Miscibility gaps B320SH

Miscibility gaps for oil B320SH: Limit temperature depending on oil content (mass % of oil in oil refrigerant blend).M: Range of complete miscibility.P: Phase separation range (miscibility gap).
Miscibility gaps for oil B320SH: Limit temperature depending on oil content (mass % of oil in oil refrigerant blend).
M: Range of complete miscibility.
P: Phase separation range (miscibility gap).

Refrigerant solubility in B320SH

The following diagram can be used to read off the refrigerant content in the lubricant depending on refrigerant pressure and oil temperature.

Oil B320SH: Refrigerant pressure depending on oil temperature and refrigerant content (mass % of refrigerant in oil-refrigerant blend).
Oil B320SH: Refrigerant pressure depending on oil temperature and refrigerant content (mass % of refrigerant in oil-refrigerant blend).

Warning values for used oil

B320SH is categorized as group KC according to DIN51503-1. To determine the used condition of the oil, e.g. with respect to water content or total acid number (TAN), the reference values of DIN 51503-2, apply.

Warning values for used Bitzer oil B320SH for the refrigerant R22

Warning values B320SH

Kinematic viscosity at 40°C (DIN EN ISO3104)

outside of 264 .. 356 cSt 
(that is ± 15% of the value for new oil)

Max. water content
(DIN51777)

150 mg H2O/‍‍kg oil

Total acid number
(DIN ISO6618)

0,2 mg KOH/‍g

Elastomer compatibility

Relevant literature recommends ethylene propylene diene rubber as seaI material for complex ester with refrigerant R22.