Case Study: PRESTO A85t Process system

Cooling a Büchiglas 50 l reactor from +20 °C to lowest possible temperature with a PRESTO A85t Process system


This case study tests the lowest temperature of the JULABO PRESTO A85t Process system with a 50 l glass reactor. The PRESTO A85t is connected to the reactor via two 2 m metal hoses. The PRESTO A85t Process system cools from +20 °C to -73 °C maximum low temperature.


Test Conditions

Product PRESTO A85t Process system
Cooling capacity (Ethanol)
°C 20 0 -20 -30 -40 -60 -80
kW 2.5 2.4 2.4 2.4 2.4 2.2 0.4
Heating capacity 15 kW
Pump pressure 0.5 bar
Duration 6:30 hr:min
Test volume 50 l
Setpoint 1 +20 °C
Setpoint 2 -85 °C
Reactor 50l Büchiglas (glass)
Tubing length 2 m
Fluid in unit Thermal HL80
Fluid in reactor Thermal HL80


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

Control Parameters

XP 0.2 K
TN 720 s
TV 100 s
XPU 24 K

Test Results

The PRESTO A85t Process system cools the reactor from +20 °C to the lowest temperature of -73 °C in 6:30 h.

Set point
Temperature in the application
Temperature in temperature control unit