Lubrication oil properties of refrigeration compressor and how will you select REFRIGERANT? MEO CLASS4 ORALS

 Lubrication oil properties of refrigeration compressor?

• Should have low floc point 
• Should have low pour point.
• Should not react with REFRIGERANT
• Stability
• Defoaming character.
• Dielectric strength.

How will you select REFRIGERANT ?

• High critical temperature
• Low critical PRESSURE
• Latent head of vaporization
• Eco friendly.