High Temperature Dielectric Silicone Fluids
| Chemical Name: | Diphenyl-Dimethylsiloxane (DPDM-400) Phenylmethylsiloxane (PM-125) |
| Product Category: | Dielectric Silicone Fluids – Silicone Fluids |
| Structural Formula: |  |
| CAS No.: | CAS No. 63148-62-9 |
| EINECS: | 203-492-7 |
| Molecular Formula: | C6H18OSi2 |
| Molecular Weight: | 162.38 g/mol |
High Temperature Dielectric Silicone Fluids
High Temperature Dielectric Silicone Fluids (25°C to 300°C) are clear, colorless, and odorless phenyl-class silicone fluids, known for their exceptional dielectric strength and high flash points. These fluids offer superior thermal stability, excellent resistance to oxidation, and low vapor pressure, making them ideal for demanding applications. They are compatible with a wide range of materials, including metals, rubbers, and plastics, ensuring versatile performance and reliability in various environments.
High Temperature Dielectric Silicone Fluids are phenyl-class silicone fluids designed for applications requiring high dielectric strength, excellent thermal stability, and resistance to oxidation. These fluids, with product offsets such as GE SF1154 and Dow Corning® 550, are ideal for systems with temperatures up to 300°C (closed system) and 250°C (open system), ensuring long service life without the need for heat stabilizers or additives.
These fluids are clear, colorless, odorless, and hydrophobic, offering superior compatibility with metals, plastics, and rubbers. With a dielectric strength of 400 volts/mil and thermal conductivity values ranging from 0.00032 to 0.00035 g/cal/cm/sec °C, they ensure reliable heat transfer and insulation. The specific heat values range from 0.35 cal/g °C (for DPDM-400 Heat Transfer Fluid) to 1.418 kJ/kg K @ 0°C for PM-125, making them suitable for a wide variety of demanding applications.
Product Data:
| Property | DPDM-400 | PM-125 |
| Chemical family | Silicone | Silicone |
| Chemical name | Diphenyl-Dimethylsiloxane | Phenylmethylsiloxane |
| CAS # | 68083-14-7 | 63148-52-7 |
| Appearance | clear, colorless fluid | clear, colorless fluid |
| Odorless | Yes | Yes |
| Hydrophobic | Yes | Yes |
| Viscosity @ 25°C | 400cSt | 125cSt |
| V.T.C. | 0.82 | 0.76 |
| Pour point | -30°C | -51°C |
| Flash point | 315°C | 315°C |
| Vapor pressure @ 25°C | <1mmHg | <1mmHg |
| Thermal conductivity g/cal/cm/sec °C | 0.00032 | 0.00035 |
| Specific heat @ 25°C J/g °C | 0.35 | 1.498 kj/kg K |
| Thermal expansion cc/cc/°C | 0.00073 | 0.00075 |
| Service temperature | 25°C to 300°C | 25°C to 300°C |
Properties of High Temperature Dielectric Silicone Fluids:
- Clear, colorless, and odorless fluids with inert characteristics
- Long service life at recommended service temperatures
- Low viscosity, reducing strain on pumps
- High dielectric strength for superior insulation
- High flash points for enhanced safety
- Exceptional thermal stability for reliable performance
- Thermal conductivity ranging from 0.00032 to 0.00035 g/cal/cm/sec °C
- Low vapor pressure for improved efficiency
- High resistance to oxidation for extended use
- Significantly less viscosity change compared to petroleum-based oils
- Formulated from 100% synthetic sources for consistent quality
- Inert to most bath instrumentation and plastics
- Environmentally friendly: VOC exempt & HAP free
- Hydrophobic properties—will not absorb water
These properties make our High Temperature Dielectric Silicone Fluids ideal for demanding applications requiring high-performance insulation and heat transfer.
Packaging Specifications
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High Temperature Dielectric Silicone Fluids : Guide
Unlike conventional silicone fluids, High Temperature Silicone Heat Transfer Fluids quickly lower their viscosity when heated, making them ideal for systems that need efficient pumping at high temperatures. These fluids circulate easily under heat, ensuring consistent temperature control.
Applications include:
- High temperature dielectric fluids
- Dielectric coolants for heat transfer systems
- Calibration bath fluids for high temperatures
- Silicone fluids for temperature control systems
- Downhole (Borehole) fluids for extreme conditions
These fluids are perfect for demanding high-temperature applications that require reliable
