{ "id": 2137, "date": "2026-06-11T13:00:43", "date_gmt": "2026-06-11T13:00:43", "guid": { "rendered": "https:\/\/www.unionclay.com\/recirculating-chiller-manufacturer\/" }, "modified": "2026-06-11T14:21:30", "modified_gmt": "2026-06-11T14:21:30", "slug": "recirculating-chiller-manufacturer", "status": "publish", "type": "page", "link": "https:\/\/www.unionclay.com\/de\/recirculating-chiller-manufacturer\/", "title": { "rendered": "Recirculating Chiller Manufacturer: Sealed & Non-Sealed DLSB Series" }, "content": { "rendered": "
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UnionClay manufactures the DLSB recirculating chiller line in 24 standard build variants: 5L to 100L tank volumes, -30°C or -40°C working ranges, and a choice of sealed or non-sealed tank construction. Deep-cold builds extend to -120°C. Every unit carries a PT100 sensor, LCD control and five-way electrical protection.<\/p>\n

Two Tank Constructions, One Production Line<\/h2>\n

Most chiller suppliers list one tank style and stop there. The DLSB line is built around two distinct constructions, and the difference matters more than the glossy photos suggest. The sealed builds use a closed expansion tank between 2L and 35L and pumps rated on the parameter sheets at 20–45 L\/min against 20–25 m of head. The non-sealed builds use an open reservoir matching the model number — 5L through 100L — with pumps listed at 10–60 L\/min against 6–11 m of head.<\/p>\n

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Our reading of those pump numbers: pick a sealed DLSB<\/strong> when the coolant loop runs across the lab or up to equipment on a frame — the 20–25 m head exists for exactly that. Pick a non-sealed DLSB<\/strong> when the chiller sits next to the equipment it cools and you want a large open reservoir that is easy to top up and inspect. Both constructions share the same refrigeration logic, sensors and protections.<\/p>\n<\/div>\n\n\n\n\n\n\n\n\n\n
Build aspect<\/th>\nSealed DLSB<\/th>\nNon-sealed DLSB<\/th>\n<\/tr>\n<\/thead>\n
Coolant tank<\/td>\nClosed expansion tank, 2L–35L<\/td>\nOpen reservoir, 5L–100L<\/td>\n<\/tr>\n
Pump flow on parameter sheets<\/td>\n20–45 L\/min<\/td>\n10–60 L\/min<\/td>\n<\/tr>\n
Pump head on parameter sheets<\/td>\n20–25 m<\/td>\n6–11 m<\/td>\n<\/tr>\n
Working ranges offered<\/td>\n-30°C or -40°C to room temperature<\/td>\n-30°C or -40°C to room temperature<\/td>\n<\/tr>\n
Sensor and display<\/td>\nPT100, LCD digital button control<\/td>\nPT100, LCD digital button control<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Sealed DLSB Builds: Closed-Loop Parameter Data<\/h2>\n

The table below is parsed directly from the published parameter sheets on each recirculating chiller product page<\/a>. Note where the voltage steps from 220V to 380V — the compressor package grows with tank volume and target temperature, so the DLSB-20\/40 sealed unit<\/a> already moves to three-phase power while the -30°C unit of the same volume stays on 220V.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Model<\/th>\nWorking range<\/th>\nVoltage<\/th>\nTotal power<\/th>\nTotal current<\/th>\nExpansion tank<\/th>\nPump flow \/ head<\/th>\n<\/tr>\n<\/thead>\n
DLSB-5\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n0.9 kW<\/td>\n3.3 A<\/td>\n2L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-5\/40<\/td>\n-40°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1 kW<\/td>\n4.3 A<\/td>\n2L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-10\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1 kW<\/td>\n4.2 A<\/td>\n7L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-10\/40<\/td>\n-40°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1.4 kW<\/td>\n5.8 A<\/td>\n7L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-20\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1.4 kW<\/td>\n5.9 A<\/td>\n7L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-20\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n2.5 kW<\/td>\n4.9 A<\/td>\n10L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-30\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1.7 kW<\/td>\n7.5 A<\/td>\n10L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-30\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n3.3 kW<\/td>\n6.4 A<\/td>\n10L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-50\/30<\/td>\n-30°C to room temp.<\/td>\n380V, 50Hz<\/td>\n4 kW<\/td>\n7.9 A<\/td>\n17L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-50\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n4.6 kW<\/td>\n9.3 A<\/td>\n17L<\/td>\n20 L\/min \/ 20 m<\/td>\n<\/tr>\n
DLSB-100\/30<\/td>\n-30°C to room temp.<\/td>\n380V, 50Hz<\/td>\n4.8 kW<\/td>\n9.8 A<\/td>\n35L<\/td>\n45 L\/min \/ 25 m<\/td>\n<\/tr>\n
DLSB-100\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n5.7 kW<\/td>\n11.3 A<\/td>\n35L<\/td>\n45 L\/min \/ 25 m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Model pages for the smallest and largest sealed builds: DLSB-5\/30 sealed<\/a> und DLSB-100\/40 sealed<\/a>.<\/p>\n

Non-Sealed DLSB Builds: Open-Reservoir Parameter Data<\/h2>\n

The non-sealed line trades pump head for reservoir volume. At the top end, the 100L reservoir units run 4.8 kW at 380V whether you order the -30°C or -40°C range — one of the few points in the line where the two temperature tiers share a power package.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Model<\/th>\nWorking range<\/th>\nVoltage<\/th>\nTotal power<\/th>\nTotal current<\/th>\nReservoir<\/th>\nPump flow \/ head<\/th>\n<\/tr>\n<\/thead>\n
DLSB-5\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n0.58 kW<\/td>\n2.57 A<\/td>\n5L<\/td>\n10 L\/min \/ 7 m<\/td>\n<\/tr>\n
DLSB-5\/40<\/td>\n-40°C to room temp.<\/td>\n220V, 50Hz<\/td>\n0.9 kW<\/td>\n3.47 A<\/td>\n5L<\/td>\n10 L\/min \/ 7 m<\/td>\n<\/tr>\n
DLSB-10\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n0.85 kW<\/td>\n3.47 A<\/td>\n10L<\/td>\n15 L\/min \/ 8 m<\/td>\n<\/tr>\n
DLSB-10\/40<\/td>\n-40°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1.2 kW<\/td>\n5.12 A<\/td>\n10L<\/td>\n15 L\/min \/ 8 m<\/td>\n<\/tr>\n
DLSB-20\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1.3 kW<\/td>\n5.22 A<\/td>\n20L<\/td>\n15 L\/min \/ 8 m<\/td>\n<\/tr>\n
DLSB-20\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n2.5 kW<\/td>\n4.55 A<\/td>\n20L<\/td>\n15 L\/min \/ 8 m<\/td>\n<\/tr>\n
DLSB-30\/30<\/td>\n-30°C to room temp.<\/td>\n220V, 50Hz<\/td>\n1.8 kW<\/td>\n6.9 A<\/td>\n30L<\/td>\n15 L\/min \/ 8 m<\/td>\n<\/tr>\n
DLSB-30\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n3.2 kW<\/td>\n6.05 A<\/td>\n30L<\/td>\n15 L\/min \/ 8 m<\/td>\n<\/tr>\n
DLSB-50\/30<\/td>\n-30°C to room temp.<\/td>\n380V, 50Hz<\/td>\n4 kW<\/td>\n7.7 A<\/td>\n50L<\/td>\n60 L\/min \/ 6 m<\/td>\n<\/tr>\n
DLSB-50\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n4.5 kW<\/td>\n9.5 A<\/td>\n50L<\/td>\n60 L\/min \/ 6 m<\/td>\n<\/tr>\n
DLSB-100\/30<\/td>\n-30°C to room temp.<\/td>\n380V, 50Hz<\/td>\n4.8 kW<\/td>\n10 A<\/td>\n100L<\/td>\n35 L\/min \/ 11 m<\/td>\n<\/tr>\n
DLSB-100\/40<\/td>\n-40°C to room temp.<\/td>\n380V, 50Hz<\/td>\n4.8 kW<\/td>\n10 A<\/td>\n100L<\/td>\n35 L\/min \/ 11 m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Compare entry and top builds directly: DLSB-5\/30 non-sealed<\/a> und DLSB-100\/30 non-sealed<\/a>.<\/p>\n

Below -40°C: Deep-Cold Builds Down to -120°C<\/h2>\n

The 24 standard variants stop at -40°C, but the factory does not. The low temperature recirculating chiller family<\/a> covers five target tiers with closed-circulation, non-volatile coolant loops.<\/p>\n\n\n\n\n\n\n\n\n\n
Spec area<\/th>\nLow-temperature family data<\/th>\n<\/tr>\n<\/thead>\n
Temperature options<\/td>\n-40°C, -60°C, -80°C, -100°C and -120°C<\/td>\n<\/tr>\n
Circulation system<\/td>\nClosed circulation, non-volatile coolant loop<\/td>\n<\/tr>\n
Cooling type<\/td>\nAir cooling or water cooling<\/td>\n<\/tr>\n
Regelung<\/td>\nPID or PLC options by model<\/td>\n<\/tr>\n
Typical series<\/td>\nDLSB and DFY low-temperature systems<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

If your process needs both heating and cooling from a single circulation unit, the heating and cooling integrated machines<\/a> are the sister line built in the same plant.<\/p>\n

The Equipment These Chillers Keep Cold<\/h2>\n