The chiller (or heating-cooling integrated unit) paired with a jacketed glass reactor has to remove your process heat at the working temperature — and cooling capacity falls as the set point drops. This guide gives the jacket volume for each reactor size, the outer-circulation port sizes, and the source-provided cooling-capacity data of the Umlaufkühler und heating-cooling integrated unit range at room temperature, 0 °C and the lowest point, taken from the UnionClay technical documentation for each model.
Step 1: Look Up the Jacket Volume
The jacket is the annular space between the inner and outer glass walls; its volume is the thermal mass your chiller must cool first. Figures from the UnionClay parameter sheets:
| Reactor size | Approximate jacket volume |
|---|---|
| 20 L | approx. 6 L |
| 30 L | approx. 9 L |
| 50 L | approx. 15 L |
| 100 L | approx. 30 L |
| 150 L | approx. 45 L |
| 200 L | approx. 60 L |
Step 2: Match the Outer-Circulation Port
- DN15 port on models of 30 L and below.
- DN20 port on models of 50 L and above.
Confirm the port size before ordering hoses and fittings so the chiller loop connects without adapters.
Step 3: Compare Cooling Capacity at Your Working Temperature
Capacity is not one number: every model below lists the source-provided cooling capacity at room temperature, at 0 °C and at its lowest point. Compare the figure at your working temperature against your process heat load. A dash (—) marks lowest-point figures under internal confirmation; ask us for the current value.
DLSB sealed recirculating chillers, −30 °C series
| Model | Cooling capacity at room temperature (kW) | At 0 °C (kW) | At −30 °C (kW) |
|---|---|---|---|
| DLSB-5/30 | 0.875 | 0.65 | 0.275 |
| DLSB-10/30 | 2.01 | 1.65 | 0.65 |
| DLSB-20/30 | 2.8 | 2.3 | 0.6 |
| DLSB-30/30 | 4.6 | 3.5 | 0.6 |
| DLSB-50/30 | 10.5 | 9.3 | — |
| DLSB-100/30 | 15.75 | 13.25 | 4.5 |
DLSB sealed recirculating chillers, −40 °C series
| Model | Cooling capacity at room temperature (kW) | At 0 °C (kW) | At −40 °C (kW) |
|---|---|---|---|
| DLSB-5/40 | 1.9 | 1 | 0.17 |
| DLSB-10/40 | 2.8 | 2.5 | 0.55 |
| DLSB-20/40 | 5.62 | 4.1 | 0.9 |
| DLSB-30/40 | 7.5 | 6.18 | 0.9 |
| DLSB-50/40 | 12.7 | 10.5 | — |
| DLSB-100/40 | 18 | 12.45 | — |
DLSB non-sealed recirculating chillers, −30 °C series
| Model | Cooling capacity at room temperature (kW) | At 0 °C (kW) | At −30 °C (kW) |
|---|---|---|---|
| DLSB-5/30 | 0.875 | 0.65 | 0.275 |
| DLSB-10/30 | 2.01 | 1.65 | 0.65 |
| DLSB-20/30 | 2.8 | 2.3 | 0.6 |
| DLSB-30/30 | 4.6 | 3.5 | 0.6 |
| DLSB-50/30 | 10.5 | 9.3 | — |
| DLSB-100/30 | 15.75 | 13.25 | 4.5 |
DLSB non-sealed recirculating chillers, −40 °C series
| Model | Cooling capacity at room temperature (kW) | At 0 °C (kW) | At −40 °C (kW) |
|---|---|---|---|
| DLSB-5/40 | 1.9 | 1 | 0.17 |
| DLSB-10/40 | 2.8 | 2.5 | 0.55 |
| DLSB-20/40 | 5.62 | 4.1 | 0.9 |
| DLSB-30/40 | 7.5 | 6.18 | 0.9 |
| DLSB-50/40 | 12.7 | 10.5 | — |
| DLSB-100/40 | 15.7 | 11 | — |
GDX/DFY heating-cooling integrated units, −30 °C series
| Model | Cooling capacity at room temperature (kW) | At 0 °C (kW) | At −30 °C (kW) |
|---|---|---|---|
| DFY-20/30 | 2.8 | 2.45 | 0.6 |
| GDX-20/30 | 2.8 | 1.9 | 0.6 |
GDX/DFY heating-cooling integrated units, −40 °C series
| Model | Cooling capacity at room temperature (kW) | At 0 °C (kW) | At −40 °C (kW) |
|---|---|---|---|
| DFY-20/40 | 5.6 | — | 0.8 |
| GDX-20/40 | 5.625 | — | — |
| DFY-50/40 | 12.7 | 10.5 | — |
| GDX-50/40 | 12.775 | 10.5 | — |
| GDX-100/40 | 15.75 | — | — |
Selection Checklist
- Reactor size → jacket volume (Step 1).
- Working temperature → the capacity column to read (Step 3).
- Process heat load → must stay below the capacity figure at the working temperature.
- Outer-circulation port → DN15 or DN20 (Step 2).
- Mains supply and installation space → listed on each product page.
Pairing Questions
What size chiller do I need for a 50 L jacketed reactor?
A 50 L reactor has a jacket volume of approx. 15 L and a DN20 port. At 0 °C the DLSB-50/30 sealed chiller is listed at 9.3 kW and the DLSB-50/40 sealed model at 10.5 kW; compare those figures with your process heat load at the working temperature.
Why is the lowest-temperature cell missing for some models?
Some −40 °C lowest-point figures are under internal confirmation because source documents disagree; those cells are marked — rather than publishing an unconfirmed value. Ask us through the contact page for the current figure.
Do I have to match the DN port exactly?
The port size (DN15 up to 30 L, DN20 from 50 L) is fixed by the reactor model; confirm it before ordering hoses and fittings.
Need help pairing a unit with your reactor? Contact UnionClay with the reactor size, working temperature and process load.