Spare parts.

All repairs must be made in clean conditions and by clean practices compatible with subsequent efficient operation of the unit in systems requiring fluid cleanliness to 17/15/12, (formerly 16/13). Note: Bolded values are particle count codes of contaminant sizes 5+ m and 15+ m, respectively, in accordance with ISO 4406. The non-bolded value is that of contaminant sizes 2+ m. The latter is a new measurement adopted by Vickers, and which ISO is considering; see publication 9132 “Vickers Guide to Systemic Contamination Control”. ProportionalWegeventile