Case Study: PRESTO W56 Process system

Cooling a Büchiglas 50 l reactor from +20 °C to lowest possible temperature with a PRESTO W56 Process system


This case study tests the lowest temperature of the JULABO PRESTO W56 Process system with a 50 l glass reactor. The PRESTO W56 is connected to the reactor via two 2 m metal hoses. The PRESTO W56 Process system cools from +20 °C to -47 °C maximum low temperature.

Test Conditions

Product PRESTO W56 Process system
Cooling capacity (Ethanol)
°C 20 0 -10 -20 -30 -40 -50
kW 25.8 23.1 16.9 11.5 7.1 3.5 1.4
Heating capacity 27 kW
Band limit 200 °k
Pump pressure 0.5 bar
Duration 2:30 hr:min
Test volume 37.5 l
Setpoint 1 +20 °C
Setpoint 2 -50 °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/3PPE/50Hz

Control Parameters

XP 0.19 K
TN 695 s
TV 93 s
XPU 15 K

Test Results

The PRESTO W56 Process system cools the reactor from +20 °C to the lowest temperature of -47 °C in 2:30 h.

Set point
Temperature in the application
Temperature in temperature control unit