Advantage Regal Series hot-oil units (RK models) circulate thermal oil instead of water, at 30 to 100 GPM, from 100°F up to 500°F. Oil is the correct fluid choice above the practical range of water circulation - water flashes to steam well below 500°F under normal system pressure, while oil stays liquid and stable across the full range these units are built for.
Typical applications include die-casting processes that run hotter than a water-based die-preheat unit can reach, extrusion die and barrel temperature control, and reactor-jacket heating where the jacket needs to be held at a high, steady temperature.
Hot-oil systems require different seals, piping materials and pump construction than water units, which is why they're a distinct product line rather than the same frame with a hotter rating. Tell us the target setpoint, flow rate, and the process connection so we can confirm oil compatibility with your piping and jacket materials.
Once a required setpoint sits above roughly 300°F, oil isn't an upgrade over water - it's the only fluid that stays liquid and stable at that temperature under normal system pressure. Piping, seals and pump construction on an Advantage hot-oil unit are built for that duty from the start, which is also why an existing water TCU can't simply be run hotter to close the gap.
Piping and jacket material compatibility with hot oil matters as much as the temperature and flow numbers - tell us what the existing process piping and jacket are built from so we can confirm compatibility before finalizing a system.
| Factor | Water TCU (Up to 300°F) | Hot Oil TCU (Regal, Up to 500°F) |
|---|---|---|
| Setpoint range | Up to 300°F | 300°F to 500°F |
| Flow | 35-100 GPM | 30-100 GPM |
| Seals & piping | Standard water-service construction | Oil-compatible seals and piping required |
| Typical use | Hot-runner molds, laminating, standard die preheat | High-temp die casting, extrusion, reactor-jacket heating |
An existing water TCU can't simply be run hotter to reach oil-service temperatures - the seals and piping aren't built for it. Call and talk it through with an engineer: 1-805-484-2992.