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Galden HT 270
4 5 (1 evaluate)Category: Galden® HT
Maker: Syensqo
Made in: Italy
Packaging: 1kg, 5kg
What is Galden HT 270?
Galden HT 270 is a heat transfer fluid characterized by its elevated boiling point, which enables it to perform efficiently in heat transfer tasks at both high temperatures and low pressures. Galden HT 270 is extensively used in various industrial applications, particularly for cooling and heat transfer in systems and equipment that require outstanding stability and performance under harsh temperature and pressure conditions.
Key Features of Galden® HT 270
Galden® HT 270 is the highest-boiling standard grade in the Galden® HT heat-transfer-fluid series. It is a PFPE-based, dielectric and chemically inert fluid developed for demanding high-temperature thermal-management applications.
| Feature | Customer Benefit |
|---|---|
| High boiling point of 270°C | Supports high-temperature heat-transfer processes while providing greater resistance to boiling than lower-boiling Galden® HT grades. |
| Very low vapor pressure at ambient temperature | Helps reduce evaporation losses, fluid consumption and pressure buildup in properly designed closed-loop systems. |
| Excellent thermal stability | Maintains reliable performance under elevated-temperature operating conditions and helps reduce fluid degradation. |
| Good dielectric properties | Provides electrical insulation for thermal management near transformers, power electronics, semiconductor equipment and other sensitive electrical components. |
| Chemically inert PFPE structure | Resists reactions with acids, alkalis, fuels, oils and many aggressive process chemicals, helping protect equipment and fluid integrity. |
| Non-flammable | Has no flash point, fire point or auto-ignition point under standard test conditions, improving safety compared with combustible heat-transfer fluids. |
| Low residue formation | Negligible decomposition under recommended operating conditions helps minimize deposits, contamination and system maintenance. |
| High density and stable physical properties | Supports predictable thermal-system design and consistent fluid behavior across demanding operating cycles. |
| Compatible with many engineering materials | Can be used with a broad range of metals, plastics and elastomers, subject to compatibility testing under actual operating conditions. |
| Suitable for high-temperature industrial systems | Supports applications such as semiconductor equipment, vapor-phase heating, chemical and pharmaceutical processing, transformers, recirculating systems and specialized industrial thermal control. |
Galden® PFPE fluids provide a typical dielectric strength of approximately 40 kV across a 2.54 mm gap and are non-flammable. Galden® HT 270 has a nominal boiling point of 270°C, while system designers should maintain an appropriate temperature margin below the boiling point in single-phase circulation systems.
Technical data sheet of Galden HT 270
Physical
|
Property |
Typical Value |
Unit |
|---|---|---|
|
Average Molecular Weight |
1550 |
amu |
|
Density |
1.85 |
g/cm³ |
|
Kinematic Viscosity |
14.0 |
cSt |
|
Solubility |
|
|
|
of air |
26.0 |
ml gas/100 ml liquid |
|
of water |
<10.0 |
wppm |
|
Surface Tension |
20 |
dyne/cm |
|
Vapor Pressure |
<10E-2 |
torr |
Thermal
|
Property |
Typical Value |
Unit |
|---|---|---|
|
Boiling Point |
270 |
°C |
|
Heat of Vaporization - at Boiling Point |
15.0 |
cal/g |
|
Specific Heat Capacity (25°C) |
0.23 |
cal/g/°C |
Electrical
|
Property |
Typical Value |
Unit |
|---|---|---|
|
Dielectric Constant |
1.94 |
|
|
Dielectric Strength - 2.54mm gap |
40 |
kV |
|
Volume Resistance |
6x10E15 |
ohms·cm |
Optical
|
Property |
Typical Value |
Unit |
Test Method |
|---|---|---|---|
|
Refractive Index |
1.28 |
|
ASTM |
Galden® HT Series Comparison
| Grade | Boiling Point (°C) | Density @ 25°C (g/cm³) | Vapor Pressure @ 25°C (torr) | Viscosity @ 25°C (cSt) | Dielectric Strength | Chemical Stability | Flammability | Residue |
|---|---|---|---|---|---|---|---|---|
| Galden® HT 55 | 55 | 1.65 | 225 | 0.45 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 70 | 70 | 1.68 | 141 | 0.50 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 80 | 80 | 1.69 | 105 | 0.57 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 110 | 110 | 1.71 | 17 | 0.77 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 135 | 135 | 1.72 | 5.8 | 1.00 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 170 | 170 | 1.77 | 0.8 | 1.80 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 200 | 200 | 1.79 | 0.2 | 2.40 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 230 | 230 | 1.82 | 0.03 | 4.40 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
| Galden® HT 270 | 270 | 1.85 | <0.01 | 14.00 | 40 kV | Chemically inert | Non-flammable | No decomposition residue |
Notes: Dielectric strength is approximately 40 kV at a 2.54 mm electrode gap. Galden® HT fluids have no flash point, fire point or auto-ignition point under standard test conditions. Values shown are typical data and should not be considered guaranteed specifications.
Additional Information
|
Property |
Typical Value |
Unit |
|---|---|---|
|
Thermal Conductivity (25°C) |
0.065 |
W/m°C |
|
Coefficient of Expansion |
0.0011 |
cm³/cm³.°C |
Applications of Galden® HT 270
Galden® HT 270 is a high-boiling PFPE heat-transfer fluid designed for demanding thermal systems requiring low volatility, electrical insulation, chemical inertness and non-flammability. Its nominal boiling point is 270°C, making it particularly suitable for high-temperature applications where evaporation losses must be minimized.
1. Semiconductor Manufacturing Equipment
Galden® HT 270 can be used in high-temperature heat-transfer circuits serving semiconductor fabrication equipment, including dry etching, chemical vapor deposition (CVD) and physical vapor deposition (PVD) systems.
Its high boiling point and low evaporation rate help reduce fluid loss, pressure variation and cavitation risks in demanding wafer-processing environments. Its chemical inertness also supports operation near aggressive process chemicals and reactive gases.
2. High-Temperature Recirculating Chillers
Galden® HT 270 is suitable for specialized recirculating chillers and thermal-control units operating at elevated temperatures.
Compared with lower-boiling Galden® grades, HT 270 provides substantially lower volatility, helping improve fluid retention in closed-loop systems. Its use is particularly relevant where conventional heat-transfer liquids may degrade, react with process materials or create a flammability risk.
3. Chemical Processing Systems
Galden® HT 270 can serve as a heat-transfer medium in jacketed reactors, process vessels and other chemical-processing equipment requiring stable high-temperature control.
Its PFPE structure provides excellent chemical inertness and resistance to many aggressive substances. This can help reduce corrosion, undesirable chemical reactions and contamination of the thermal-control system.
4. Pharmaceutical Process Equipment
The fluid can be considered for closed heat-transfer circuits used in pharmaceutical reactors, synthesis equipment and specialized temperature-controlled manufacturing systems.
Its non-flammability, chemical stability and low residue formation are valuable where process safety, equipment cleanliness and reliable temperature control are important. Final selection should account for system design, material compatibility and applicable pharmaceutical manufacturing requirements.
5. Transformers and High-Power Electrical Equipment
Galden® HT 270 can provide heat removal and electrical insulation in compatible transformers, power-electronic systems and other high-temperature electrical equipment.
Galden® PFPE fluids have a typical dielectric strength of approximately 40 kV across a 2.54 mm gap. Their dielectric characteristics, non-flammability and thermal stability make them suitable for thermal management near electrically energized components.
Frequently Asked Questions About Galden® HT 270
1. What is Galden® HT 270?
Galden® HT 270 is an inert, dielectric PFPE fluid developed for high-temperature heat-transfer applications. It is the highest-boiling standard grade in the Galden® HT series, with a nominal boiling point of 270°C.
2. What is the recommended operating temperature for Galden® HT 270?
For an unpressurized single-phase circulation system, Syensqo’s general selection guideline places the upper operating limit approximately 10°C below the fluid’s boiling point. This corresponds to about 260°C for HT 270.
The practical lower limit is determined by viscosity, pump capability, flow rate and system pressure drop. Actual operating limits may differ in pressurized or specially engineered systems.
3. Why choose Galden® HT 270 instead of a lower-boiling Galden® grade?
HT 270 is generally selected when high-temperature capability and minimum evaporation loss are more important than low ambient-temperature viscosity.
It has much lower vapor pressure than grades such as HT 55, HT 110 or HT 170. However, its typical kinematic viscosity is approximately 14 cSt at 25°C, so pump sizing and pressure drop must be carefully evaluated.
4. Is Galden® HT 270 flammable and electrically conductive?
Galden® HT 270 is non-flammable and has no flash point, fire point or auto-ignition point under standard test conditions.
It is also an electrically insulating fluid. The Galden® PFPE family has a typical dielectric strength of approximately 40 kV across a 2.54 mm gap, supporting use near sensitive electrical and electronic equipment.
5. Is Galden® HT 270 compatible with common system materials?
Galden® PFPE fluids are compatible with many metals, plastics and elastomers commonly used in heat-transfer equipment. However, compatibility depends on the exact material formulation, operating temperature and thermal cycling conditions.
Actual seals, gaskets, hoses, pumps and construction materials should therefore be tested under representative operating conditions before final system approval.
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