Case Study: PRESTO W55 Process system

Cooling a Büchiglas 50 l reactor from +20 °C to lowest possible temperature with a PRESTO W55 Process system


This case study tests the lowest temperature of the JULABO PRESTO W55 Process system with a 50 l glass reactor. The PRESTO W55 is connected to the reactor via two 2 m metal hoses. The PRESTO W55 Process system cools from +20 °C to -52 °C maximum low temperature.

Test Conditions

Product PRESTO W55 Process system
Cooling capacity (Ethanol)
°C 20 0 -10 -20 -30 -40 -50
kW 15 10 6.5 4 2.5 1.2 0.3
Heating capacity 15 kW
Pump pressure 0.5 bar
Duration 4:20 hr:min
Test volume 35 l
Setpoint 1 +20 °C
Setpoint 2 -65 °C
Reactor 50l Büchiglas (glass)
Tubing length 2 m
Fluid in unit Thermal HL60
Fluid in reactor Thermal HL60


Room temperature 20 °C
Humidity 45 %
Voltage version 400V/3PNPE/50Hz

Control Parameters

XP 0.1 K
TN 689 s
TV 37 s
XPU 24 K

Test Results

The PRESTO W55 Process system cools the reactor from +20 °C to the lowest temperature of -52 °C in 4:20 h.

Set point
Temperature in the application
Temperature in temperature control unit