CPI 4628 Series

CPI Fluid Engineering



The CPI 4628 Series is manufactured using a high-quality, synthetic base stock of polyalphaolefin (PAO) in addition with CPI-patented seal well technology.

This ammonia compressor lubricant has been developed specifically for the refrigeration industry and can be used in ammonia compressors, process gas rotary screw compressors and process gas reciprocating compressors.

CPI 4628 Series Applications

CPI 4628 Series lubricants, available in three different viscosity grades (CPI 4628-32 ISO VG 32, CPI 4628-46 ISO VG 46 and CPI 4628-68 ISO VG 68) are ideally suited for compressors utilising an Ammonia gas as the refrigerant with evaporator temperatures below -39°C. They have low pour points (-54°C to -60°C) and enhanced oxidation stability which enables them to operate over a wider temperature range than a standard mineral oil. These oils can reduce down-time, maintenance and ultimately, costs due to their low volatility and decreased lubricant consumption. CPI’s patented seal well technology minimizes ammonia leaks and its low carry-over improves evaporator efficiency.

CPI Fluid Engineering and Lubrizol

This 4628 Series lubricant has been developed by a joint venture between CPI Fluid Engineering, a world leader in the development and production of synthetic lubricants and operate in Europe, North America, Africa and Asia Pacific, and Lubrizol, the leading additive producer to the lubricant industry. Oil Store are pleased to supply the CPI range of refrigeration oils directly online. Speak to our expert team for more information.

Additional information

Weight N/A
Viscosity Grade

ISO VG 32 (CPI 4628-32), ISO VG 46 (CPI 4628-46), ISO VG 68 (CPI 4628-68)

Pack Size

19L, 208L