The Swiben GDX-50/30 is a combined heating and cooling circulator that integrates a low-temperature circulating pump with a high-temperature oil bath in one unit. It operates across a -30 to 199°C range with a 50L capacity, supplying temperature-controlled fluid to external process equipment.

The unit is intended to supply heat transfer fluid to jacketed glass or stainless steel reactors with working volumes in the 10–20L range. It suits laboratory and process settings in chemical, biochemical, and research applications.

Its closed liquid circulation uses heat transfer oil, allowing continuous operation across both low and high temperatures without absorbing moisture at low temperatures or producing oil mist at high temperatures.

How It Works

The system circulates heat transfer oil through a sealed loop driven by an internal pump rated at 280 W, delivering up to 35 L/min flow with an 11 m lift. An integrated heating and cooling vessel provides the heat exchange surface, while a separate expansion vessel is mechanically connected but isolated from the main circulation, keeping its medium below 60°C. The circulating fluid is delivered to an external jacketed reactor for temperature-controlled reactions.

Key Features

• Combined heating and cooling functions in a single integrated unit
• Temperature range of -30 to 199°C with temperature fluctuation of ±2°C
• 50L capacity, suitable for reactor working volumes of 10–20L
• Heating power of 6000 W and cooling power up to 11500 W; cooling capacity 1450–13100 W
• Circulating pump rated at 280 W with 35 L/min flow and 11 m lift
• Closed circulation loop using heat transfer oil with isolated expansion vessel
• Safety features including compressor overload protection, high-pressure switch, overload relay, and thermal protection