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Twin Specialties' line of heat transfer oils serve as excellent heat transfer media for manufacturing processes where temperatures will not exceed 600ºF. In properly designed closed systems equipped with expansion tanks, they will provide excellent service and are non-corrosive. These premium oils are highly refined paraffinic oils with excellent oxidation stability and low temperature properties.

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Castrol Drum

55 gal Castrol Perfecto HT 4 Heat Transfer Oil
Shell Drum

55 gal Shell Heat Transfer Oil S2
Castrol Tote

Bulk Castrol Perfecto HT 5 Plus Heat Transfer Oil
Castrol Drum

55 gal Castrol Perfecto HT 5 Plus Heat Transfer Oil
Shell Tote

Bulk Shell Heat Transfer Oil S2 X
Description N/A Castrol Perfecto™ HT Range (previously called Heat Transfer Oil Light 100 and Heat Transfer Oil 1590) are formulated from very stable paraffinic base oils that are fortified with high temperature oxidation inhibitors that carry away heat from critical components. Perfecto HT’s high viscosity index coupled with a low pour point offers excellent circulation during cold weather startups, eliminates heat from over heated pump motors, and protects against hot spots (high fluid temperature in the heat exchanger). N/A Shell Heat Transfer Oil S2 is based on carefully selected, highly refined mineral oils chosen for their ability to provide superior performance in indirect closed fluid heat transfer systems. N/A Castrol Perfecto™ HT Range (previously called Heat Transfer Oil Light 100 and Heat Transfer Oil 1590) are formulated from very stable paraffinic base oils that are fortified with high temperature oxidation inhibitors that carry away heat from critical components. Perfecto HT’s high viscosity index coupled with a low pour point offers excellent circulation during cold weather startups, eliminates heat from over heated pump motors, and protects against hot spots (high fluid temperature in the heat exchanger). N/A Castrol Perfecto™ HT Range (previously called Heat Transfer Oil Light 100 and Heat Transfer Oil 1590) are formulated from very stable paraffinic base oils that are fortified with high temperature oxidation inhibitors that carry away heat from critical components. Perfecto HT’s high viscosity index coupled with a low pour point offers excellent circulation during cold weather startups, eliminates heat from over heated pump motors, and protects against hot spots (high fluid temperature in the heat exchanger). N/A Shell Heat Transfer Oil S2 X is a premium quality heat transfer fluid for use in indirectly heated closed heat transfer systems. It is based on carefully selected highly refined mineral oils chosen for their ability to provide superior performance in heat transfer systems and contains an oxidation inhibitor to provide long service life.
Product Type N/A
Quantity N/A 55 gal N/A 55 gal N/A 330 gal N/A 55 gal N/A 330 gal
ISO Viscosity Grade N/A 22 cSt N/A 29 cSt N/A 46 cSt N/A 46 cSt N/A 54 cSt
Viscosity at 100ºC N/A 4.0 cSt N/A 5.1 cSt N/A 7.1 cSt N/A 7.1 cSt N/A 8.2 cSt
Viscosity at 200ºC N/A N/A 1.4 cSt N/A N/A N/A
Viscosity Index N/A 97 N/A N/A 100 N/A 100 N/A 96
Flash Point N/A 190 ºC N/A 208 ºC N/A 215 ºC N/A 215 ºC N/A 260 ºC
Pour Point N/A -28 ºC N/A -12 ºC N/A 23 ºC N/A 23 ºC N/A -6 ºC
Boiling Point N/A N/A 330 ºC N/A N/A N/A
Autoignition Temperature N/A N/A 332 ºC N/A N/A N/A
Conradson Carbon N/A N/A < 0.01 % N/A N/A N/A 0.02 %
Copper Corrosion N/A N/A Class 1 N/A N/A N/A Class 1
Neutralization Value N/A N/A 0.2 mg KOH/g N/A N/A N/A 0.05 mg KOH/g
Coefficient of Thermal Expansion N/A N/A 0.0008 N/A N/A N/A 0.0006
Water Weight N/A N/A N/A N/A N/A < 0.1 %
Applications N/A Perfecto HT 4 (Heat Transfer Oil Light 100 Light) is recommended for application in closed circulation systems with temperatures up to 287° C (550° F). Perfecto HT 4 is particularly applicable where high transfer rates or good flow rates at fairly low temperature are desired.

Perfecto HT 5 Plus (Heat Transfer Oil 1590) is recommended for application in closed circulation systems with temperatures up to 315°C (600° F). 		N/A Enclosed circulated heat transfer systmes for industrial applications such as process industry, chemical plants, textile producers, etc. and in household equipment such as oil filled radiators. 

Shell Heat Transfer Oil S2 can be used in high temperature continuous heat transfer equipment with the following application limits:
  • Max film temperature - 320 C
  • Max bulk temperature - 300 C
 		N/A Perfecto HT 4 (Heat Transfer Oil Light 100 Light) is recommended for application in closed circulation systems with temperatures up to 287° C (550° F). Perfecto HT 4 is particularly applicable where high transfer rates or good flow rates at fairly low temperature are desired.

Perfecto HT 5 Plus (Heat Transfer Oil 1590) is recommended for application in closed circulation systems with temperatures up to 315°C (600° F). 		N/A Perfecto HT 4 (Heat Transfer Oil Light 100 Light) is recommended for application in closed circulation systems with temperatures up to 287° C (550° F). Perfecto HT 4 is particularly applicable where high transfer rates or good flow rates at fairly low temperature are desired.

Perfecto HT 5 Plus (Heat Transfer Oil 1590) is recommended for application in closed circulation systems with temperatures up to 315°C (600° F). 		N/A Industrial Heat Transfer Systems - For use in closed heat transfer systems used in chemical and process plant, textile manufacturers, etc. where the oil is circulated in a pumped system operating under atmospheric pressure with or without an inert gas blanket. 

Shell Heat Transfer Oil S2 X can be used in high temperature continuous heat transfer equipment with the following application limits:
  • Max film temperature - 315 C
  • Max bulk temperature - 290 C
Features and Benefits N/A
  • Low vapor pressure at elevated temperatures and a high boiling point to prevent pressure build-up
  • Low carbon residue
  • Non-foaming and excellent demulsibility.
  • Long shelf life.
 		N/A Extended Maintenance Intervals - Shell Heat Transfer Oil S2 is based on carefully selected highly refined mineral oils and resists oil cracking, oxidation and thickening. This provides extended oil life, provided efficient fluid heating and good pump circulation is ensured, such that film temperatures on the heater surface do not exceed the limits below.

System Efficiency - Low viscosity enables excellent fluidity and heat transfer over a wide temperature range. Shell Heat Transfer Oil S2 also has a low vapor pressure so resists cracking. This minimizes the formation of volatile decomposition products; these would require recovery via expansion chamber and condensate collector.

Wear Protection - Shell Heat Transfer Oil S2 is non-corrosive and has high solvency - this reduces deposit formation by holding oxidation products in solution and keeping internal surfaces of heat exchangers clean. 		N/A
  • Low vapor pressure at elevated temperatures and a high boiling point to prevent pressure build-up
  • Low carbon residue
  • Non-foaming and excellent demulsibility.
  • Long shelf life.
 		N/A
  • Low vapor pressure at elevated temperatures and a high boiling point to prevent pressure build-up
  • Low carbon residue
  • Non-foaming and excellent demulsibility.
  • Long shelf life.
 		N/A Extended Maintenance Intervals - Shell Heat Transfer Oil S2 X is based on carefully selected highly refined mineral oils and resists oil cracking, oxidation and thickening. This provides extended oil life, provided efficient fluid heating and good pump circulation is ensured, such that film temperatures on the heater surface do not exceed the limits below.

System Efficiency - Low viscosity enables excellent fluidity and heat transfer over a wide temperature range. Shell Heat Transfer Oil S2 X also has a low vapor pressure so resists cracking. This minimizes the formation of volatile decomposition products; these would require recovery via expansion chamber and condensate collector. 

Wear Protection - Shell Heat Transfer Oil S2 X is non-corrosive and has high solvency - this reduces deposit formation by holding oxidation products in solution and keeping internal surfaces of heat exchangers clean. 
Claims (Meets Requirements) N/A N/A DIN 51522 ISO 6743-12 Family Q N/A N/A N/A DIN 51522 ISO 6743-12 Family Q
Additional Information N/A N/A The life of Shell Heat Transfer Oil S2 depends on the design and usage of the system. If the system is well designed and not subjected to abnormal workloads, the life can be for many years. It is important to monitor oil condition regularly as rates of change in physical characteristics are more significantly than actual values. The properties that should be monitored are viscosity, acidity, flash point (open and closed) and insolubles content. N/A N/A N/A The service life of Shell Heat Transfer Oil S2 X depends on the design and operation of the system. If the system is well designed and not subjected to abnormal workloads, the life can be many years. It is important to monitor oil condition regularly as rates of change in physical characteristics are more significant than actual values. The properties that should be monitored are viscosity, acidity, flash point (open and closed) and insolubles content.
Bulk Density N/A 7.141 lb/gal N/A N/A 7.224 lb/gal N/A 7.224 lb/gal N/A
Specific Gravity at 60ºF N/A 0.8576 N/A N/A 0.8676 N/A 0.8676 N/A