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www.foodengineeringmag.com/articles/90563-ammonia-compressor-lubricant

Ammonia compressor lubricant
April 9, 2013
Used in rotary screw and reciprocating compressors, Summit RHT FG-68 NSF H1 hydrotreated ammonia compressor lubricant functions under the requirements of closed-loop DX ammonia refrigeration systems. It is compatible with naphthenic oils, PAO and alkylbenzene-based synthetic formulations.
Summit Industrial Products; 800-749-5823; www.klsummit.com