PCT & PCL
Excellent anti-corrosion behaviour and long-term stability for closed loops. PCT is polysiloxane-based; PCL is a hydrocarbon synthetic oil.
Dielectric fluids
Nine grades. One molecule team.
Runhe designs its own molecular structures, so viscosity, dielectric strength and boiling behaviour are tuned for the system — not chosen from a catalogue.
Portfolio
Technical data
Viscosity in cSt, dielectric strength in kV/2.5 mm, flash point in °C (closed cup), thermal conductivity in W/mK.
| Product code | Chemical component | Viscosity 25 °C cSt | Viscosity 40 °C cSt |
Breakdown strength kV/2.5 mm | Flash point °C |
Thermal conductivity W/mK | Dielectric constant | Typical application |
|---|---|---|---|---|---|---|---|---|
| PCT-5 | Modified polysiloxane | 5 ± 1 | 3 ± 1 | > 30 | > 125 | 0.15 | 2.5 | Cold plate · data center, NEV |
| PCT-10 | Modified polysiloxane | 10 ± 1 | 8 ± 1 | > 30 | > 175 | 0.16 | 2.6 | Cold plate · data center |
| PCL-10 | Hydrocarbon synthetic oil | 10 ± 1 | 8 ± 1 | > 40 | > 190 | 0.15 | 2.0 | Cold plate · data center |
| PCL-15 | Hydrocarbon synthetic oil | 15 ± 1 | 12 ± 1 | > 50 | > 165 | 0.15 | 2.2 | Cold plate · data center |
| PCM-10 | Modified polysiloxane | 10 ± 1 | 8 ± 1 | > 50 | > 185 | 0.16 | 2.6 | Immersion · data center |
| PCM-14 | Modified polysiloxane | 14 ± 2 | 10 ± 1 | > 50 | > 190 | 0.14 | 2.4 | Immersion · data center, storage |
| PCM-20 | Modified polysiloxane | 25 ± 2 | 18 ± 2 | > 35 | > 230 | 0.15 | 2.6 | Immersion · energy storage |
| PCM-150 | Modified polysiloxane | 150 ± 15 | 115 ± 15 | > 35 | > 300 | 0.15 | 2.6 | Immersion · energy storage, charging |
| PCF-5 | Fluorine-based coolant | 1.2 | 0.9 | > 20 | — | 0.07 | 2.2 | Two-phase immersion · AI data center |
Swipe the table sideways to see every column.
Values from the Runhe liquid cooling manual. Application notes are typical rather than exclusive — confirm the grade with our engineers for a specific system.
PCM series
High thermal conductivity, low dielectric constant and a wide operating temperature range. Kinematic viscosity at −30 °C is roughly one quarter that of competing fluids.
PCF-5
A fluorinated liquid with outstanding electrical insulation, chemical inertness and thermal stability — the fluid behind the RH-ALIM-8 cabinet.
Selection guide
Match the fluid to the workload.
Single-phase immersion
Ideal for conventional high-power-density data centers. Simple system architecture, easy maintenance, and the lowest operational complexity.
Two-phase immersion
Designed for ultra-high-power-density AI computing. Higher cooling limit per litre of fluid, at the cost of a sealed, pressure-managed system.
Cold plate
Best for retrofitting existing data centers and for new builds with standard racks. Low retrofit cost and fast deployment.
Our technical team can provide customised coolant formulations and complete system solutions based on your specific requirements.
Compatibility
Tested against the hardware, not just the datasheet.
All Runhe coolants pass rigorous compatibility testing and are fully compatible with mainstream server components — seals, PCBs, cables, connectors and GPUs — so the whole system stays stable over time.
- Elastomer and seal swell testing
- PCB and connector immersion testing
- Long-duration thermal and electrical stability
Send us the loop, we will name the fluid.
Tell us the hardware, the supply temperature and the maintenance interval you need. We will recommend a grade and a top-up strategy.