Standard NBN ISO 6521-3:2021
Lubricants, industrial oils and related products (Class L) — Family D (compressors) — Part 3: Specifications of categories DRA, DRB, DRC, DRD, DRE, DRF and DRG (lubricants for refrigerating compressors) (ISO 6521-3:2019)
75.100 Lubricants, industrial oils and related products
This document specifies the minimum requirements for mineral or synthetic based lubricants intended for use in all types of refrigerating compressors. NOTE This document can be read in conjunction with ISO 6743-3.