DESCRIPTION
Castrol Aircol PD oils are a range of compressor oils, based upon highly refined mineral  oils, which are intended for the lubrication of both reciprocating and rotary air  compressors.
Aircol PD compressor oils have excellent oxidation resistance and low carbon-forming  tendencies and meet the requirements of the DIN 51506 VD-L classification of  lubricants for compressors having air discharge temperatures up to 220ºC.

APPLICATIONS
Castrol Aircol PD compressor oils also have sufficient anti-wear performance, as  measured in the FZG Gear Test, to allow their use in certain screw compressors where  drive between the screws is transmitted by the rotor faces themselves. Castrol Aircol  PD oils exhibit excellent water separation characteristics, allowing condensation formed  within the compressor to readily separate from the oil and minimizing the risk of
emulsions causing premature oil separator element blockage. Aircol PD grades are also  fully inhibited against corrosion, preventing corrosion within the compressor when  operating under humid conditions. The modern tendency in air compressor design is  towards higher capacities from smaller units, with higher loads and temperatures  leading to greater demands upon the lubricant.  Castrol Aircol PD compressor oils are available in a wide range of viscosities, to suit  different types of compressors operating in varying ambient temperatures. Selection of  the required viscosity grade should be based upon the compressor manufacturers
recommendations for the appropriate ambient temperature range, which will have been  chosen to provide the best compromise between maintaining a fluid film between the  working surfaces and minimizing the amount of power absorbed by fluid friction in this oil film. As a generalization, however, at normal ambient temperatures Aircol PD 32 and  Aircol PD 46 are suitable for oil-flooded rotary compressors, whilst Aircol PD 68 and
Aircol PD 100 would be selected for the crankcase and cylinders of reciproc ating  compressors. Aircol PD 150 is recommended for sliding-vane compressors, or for  reciprocating units at high ambient temperatures.

BENEFITS
ß Excellent oxidation stability - prolonging the life of the oil in service at higher  temperatures.
ß Maximum wear protection - ensuring longer maintenance and overhaul intervals.
ß Minimum carbon formation-resulting in less risk to fire and explosives, as well as  reduced valve replacement and delivery pipework cleaning.
ß Lower oil consumption.
ß Superior protection against rust and corrosion.
ß Easy starting at low temperatures.
ß Highly refined mineral oil - minimizes health and safety hazard.
ß Wide viscosity range - allows for compliance with machine manufacturers’
specifications.