Description

Remark: It cannot be guaranteed that the product information given below is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil here or contact us.

Mobil Gargoyle Arctic 68 NH is a high performance refrigeration oil designed specifically for the lubrication of refrigeration reciprocating and screw compressors using ammonia (NH₃, R-717). It is formulated with high quality mineral paraffinic technology providing excellent low temperature performance, low volatility and thermal stability.

Its very low miscibility with ammonia limits oil thinning and minimizes oil carry-over. Low vapour pressure reduces oil consumption and need for top-ups while preventing fractionation (viscosity increase).

Viscosity control over a wide temperature range to obtain the lowest fluidity required in the evaporator and the highest viscosity for enhanced equipment protection in the compressor.

Feature and Potential Benefits

Low volatility, helps reducing oil consumption (fewer oil top-ups), limiting oil thinning from fractionation
Low Brookfield viscosity contributes to good oil flow at low temperatures and good oil return from evaporator
Surface protection for increased equipment life, reduced repair costs
High Viscosity Index for good compressor lubrication across wide operating temperatures
Refrigerant compatibility contributes to oil separator efficiency (very low miscibility with NH3)

Applications

Application considerations: Mobil Gargoyle Arctic 68 NH is recommended for refrigeration systems for cylinder and bearing lubrication in conventional reciprocating and screw refrigeration compressors where ammonia refrigerant is used.

This includes: