Castrol Cresta SC 46 - Heat Transfer System Conditioner - 2185
Cresta SC 46 is formulated from highly refined paraffinic base stock blended with a foam depressant and an efficient high temperature detergent/dispersant. These disperse products of oxidation, dissolve lacquers and varnish, and remove these from the system in the course of a normal oil change.
Cresta SC 46 has been designed as a system conditioner for heat transfer systems using low viscosity mineral oil of the Perfecto HT5 type.
A preliminary analysis of the oil (which can be carried out by Castrol's Customer Service Laboratory) will determine if the oil requires treatment, or if treatment would be successful. Systems operating at temperatures up to 250ºC which show a viscosity increase of less than 10%, or a decrease of less than 30%, are suitable for treatment. If insolubles (oxidation products) are greater than 0.75% or the Closed Flash Point has fallen below 120ºC, then treatment is unlikely to be successful.
Cresta SC 46 is added until a TBN (Total Base Number) of eight for the total oil charge is reached. This is a measure of the concentration of the active component of the product, and should equate to approximately a 20% concentration of Cresta SC 46. Samples are taken every two weeks for at least six weeks to check the TBN and additions made as necessary to maintain a figure of eight. Any changes in operating temperatures and improvements in process reaction times should be noted. At the end of the six week conditioning period the oil should be drained, thus removing the oxidation products from the system, and refilled with new Perfecto HT5. Further extended service can however be tolerated if process requirements prevent the system from being withdrawn from service.
Pack sizes available - 208ltr drums