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HITEMP 600 LT HITEMP 600 LT is a synthetic Alkyl Benzene based heat transfer fluid designed to provide excellent thermal stability and oxidation resistance. These properties contribute to a longer service life compared with mineral oil. This product is designed to maintain efficient heat transfer performance and good flow characteristics due to its low viscosity. It also helps minimize deposit and coke formation, ensuring stable and reliable system operation over extended service periods. •Enable low viscosity and good flow properties promote efficient convective heat transfer performance over a wide operating temperature range •Exhibits excellent thermal and oxidation stability to minimizes deposit and coke formation to help maintain system cleanliness •Provides a longer service life than mineral grade •Non-corrosive and non-toxic •Can be topped up directly into systems using mineral-based heat transfer fluids (Please consult PTT Lubricants Solutions for application guidance) •Designed for non-pressurized or low- pressure indirect heating systems with operating temperatures up to 300 °C* •Recommended for liquid-phase operation only •Recommend nitrogen blanketing of the expansion tank to help extend service life •Recommended as a replacement for mineral hot oil •Suitable for heat transfer systems requiring temperature control across a wide range of industries, including offshore, textiles, plywood, and general chemical processing Page 1/2 HITEMP 600 LT REVISION 0 / 2026 Benefits Product Description Applications For more information please contact: Lubricants Technical Services Division PTT OIL AND RETAIL BUSINESS PUBLIC COMPANY LIMITED Tel: +66 2239 7847 Hotline : 1365 Fax: +66 2239 7858 E-mail : pttlubricants@pttor.com *Please consult PTT Lubricants Solutions for guidance on operating temperatures approaching 300 °C HITEMP 600 LT Page 2/2 HITEMP 600 LT REVISION 0 / 2026 Professional Lubricant Service Partner •Heat transfer fluid Q according to DIN 51522 •Classified as ASTM (ISO) 6743-12: Family Q •Meets ISO-L-QC (Max. temp. >300°C and <320°C) For more information please contact: Lubricants Technical Services Division PTT OIL AND RETAIL BUSINESS PUBLIC COMPANY LIMITED Tel: +66 2239 7847 Hotline : 1365 Fax: +66 2239 7858 E-mail : pttlubricants@pttor.com Typical Characteristics Health and SafetyPerformance Standards Thisproductshowsnosignificant healthorsafetyhazardwhenused undertherecommendedapplications andsuitablehandling. Avoid the direct contact. Wash imme- diately after contact. Health and safety information is available on the Safety Data Sheet (SDS) which can be obtained from http://pttlubricants.pttor.com Note:Dataandinformationcontainedinthispublicationarebasedonstandardtestunderlaboratoryconditionsand/orperformancetest.To considertheuseofPTTLubricants’productsinparticularapplication,customerisresponsiblefordeterminingwhetherproductand informationareappropriateforcustomerconditionsorshouldconsultwithPTTLubricants’technicalservicedivision. Theprocedureof usinganylubricantmaydifferorchangedepended ondifferentmachinesand their manuals. Therefore, werecommendtoread, understandandreviewthelatestSDSinordertoensuretheuseofproductisaccomplishedsafety. Physical & Thermal Properties versus Temperature Unit 100°C 200°C 300°C Density ASTM D 7042 g/cm 3 0.8066 0.7406 0.6746 Viscosity ASTM D 445 mm 2 /s 3.414 1.045 0.539 Specific Heat ASTM E 1269 kJ/kg·°C 2.59 3.23 4.35 Thermal Conductivity ASTM D 2717 mW/m·K 116.8 105.5 88.1 Tests Methods Units Results Density at 15 °C ASTM D 4052 g/cm 3 0.8620 Kinematic Viscosity at 40°C ASTM D 445 mm 2 /s 15.37 Flash Point (COC) ASTM D 92 °C 201 Maximum Bulk Temperature °C 300 Maximum Film Temperature °C 335 Autoignition Temperature ASTM D 2155 °C 350
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