Castrol Aircol™ AMS 46 and 68

Description

Castrol Aircol™ AMS 46 and 68 are high performance refrigeration compressor lubricants specially formulated from highly refined hydro-processed base oils and performance additives for systems running on Ammonia (NH3) refrigerant. They are specifically designed for systems where oil is allowed to separate from the refrigerant before the refrigerant passes the evaporator.

Application

The operating conditions experienced in ammonia refrigeration compressors requires very specific lubrication properties. Lubricants commonly used in Freon refrigeration compressors normally do not perform well with ammonia refrigerant, resulting in problems such as high oil carry-over from the compressor, high oil top-up rate, and rapid viscosity increase and carbon deposit formation in the compressor.

Aircol AMS is based on hydro-processed base oils, which have a narrow cut boiling point range, high degree of saturation, and low volatility properties, resulting in low carbon residues.

These base oil properties, reinforced by unique additive technology, provide outstanding performance in ammonia refrigerating compressors, effectively reducing oil top-up rate, and minimising viscosity increases and carbon deposit formation in the compressor.

Significant improvement in compressor cleanliness and multi-fold increase in oil life can therefore be expected when switching from conventional refrigeration oils to Aircol AMS.

Aircol AMS can be used in both reciprocating and screw type compressors running on ammonia refrigerant. Due to the high viscosity index of Aircol AMS compared to the normal naphthenic based refrigeration oils, it is capable of providing better wear protection to the compressor components, particularly under high discharge temperature.

To achieve the maximum benefits and increased oil life offered by Aircol AMS, it is recommended that flushing oil with high solvency should be used to clean the compressor of any residual oil before filling. One cost effective way to achieve this is by running the compressor on normal naphthenic based refrigeration oil for about 50 hours or so, then the flushing oil can then be drained off before refilling with a fresh charge of Aircol AMS.

Advantages

Good thermal stability with very low carbon residue formation tendency. Immiscible and non-reactive towards ammonia refrigerant over the entire operating temperature range, ensuring problem free operation. Good low temperature flow properties. Narrow cut base oils with low volatility, capable of reducing oil carry-over from the compressors, lowering the oil top-up rate, preventing rapid viscosity increase and prolonging oil life. High viscosity index providing good wear protection to the compressor components even at high discharge temperature.

Aircol AMS Range

10 Sep 2012 Castrol, the Castrol logo and related marks are trademarks of Castrol Limited, used under licence.

This data sheet and the information it contains is believed to be accurate as of the date of printing. However, no warranty or representation, express or implied, is made as to its accuracy or completeness. Data provided is based on standard tests under laboratory conditions and is given as a guide only. Users are advised to ensure that they refer to the latest version of this data sheet. It is the responsibility of the user to evaluate and use products safely, to assess suitability for the intended application and to comply with all applicable laws and regulations. Material Safety Data Sheets are available for all our products and should be consulted for appropriate information regarding storage, safe handling, and disposal of the product. No responsibility is taken by either BP plc or its subsidiaries for any damage or injury resulting from abnormal use of the material, from any failure to adhere to recommendations, or from hazards inherent in the nature of the material. All products, services and information supplied are provided under our standard conditions of sale. You should consult our local representative if you require any further information.

Castrol Industrial, Technology Centre , Whitchurch Hill , Pangbourne , Reading , RG8 7QR , United Kingdom www.castrol.com/industrial

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