CASTROL Perfecto HT 5

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Description

Description Castrol Perfecto HT 5 is a heat transfer oil based upon highly refined mineral oil, selected for its high thermal stability, resistance to oxidation and low volatility.

Application Castrol Perfect HT 5 is primarily intended for use in enclosed and sealed systems where oxidation of the oil cannot take place as contact with air has been prevented. In such systems maximum bulk temperatures of 300 ºC (film temperatures up to 320 ° C) are permissible. Systems are normally designed so that the only contact between the oil and air is an header tank where the oil is relatively cool and the area of ​​the exposed oil surface is limited. Although the inherent oxidation stability of this oil is high, it should be realized that the working life of the oil depends to a considerable extent on the effectiveness of the measures taken to exclude air. In open baths the oil will oxidise rapidly at temperatures much in excess of 100 ºC. Castrol Perfect HT 5 is a low viscosity oil for high velocity circulating systems - high flow rates allow high heat rates.

• Before commissioning the plant, the system should be pressure tested for leaks and then thoroughly flushed with Perfecto HT 5. Water should never be used. Having been flushed and drained, the system should be filled with fresh Perfecto HT 5. Filling is complete when the oil level in the expansion chamber is at 30-45% of the level expected at operating temperature.

• All air must be completely evacuated from the system before the temeperature is raised to operation level.

• Since mineral oils expand when heated, an expansion chamber must be incorporated in the system. This is the only location where the oil is llikely to be in contact with the atmosphere.

Despite the excellent oxidation stability of Perfecto HT5, various precautions must be taken to minimize exposure to air, especially if the temperatures of the fluid in the expansion chamber exceed 50 deg C.

• A floating cover can be used, or the oil can be blanketed with inert gas. NOTE: The terms ‘Flash and Fire 'in the typical characteristics table are purely technical names covering specific tests: they are not directly to any hazard from spontaneous combustionor explosion. In a heat transfer system it is quite normal for the oil temperature to be higher than its flash and fire paint

Advantages / Features

• Inherent oxidation resistance.

• Improved oil life. Excellent heat-transfer properties and consistently high heat-transfer perfomance. Ease of circulation even when a system is started from cold. Extended and troubled free service due to excellent oxidation resistance

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