Case Study: PRESTO W91 Process system

Cooling a QVF 50 l reactor from +20 °C to lowest possible temperature with a PRESTO W91 Process system


This case study tests the lowest temperature of the JULABO PRESTO W91 Process system with a 50 l glass reactor. The PRESTO W91 is connected to the reactor via two 2 m metal hoses. The PRESTO W91 Process system cools from +20 °C to -88 °C maximum low temperature.


Test Conditions

Product PRESTO W91 Process system
Cooling capacity (Ethanol)
°C 20 0 -20 -40 -60 -80 -90
kW 11 11 11 10.5 8 2 0.8
Heating capacity 18 kW
Pump pressure 0.5 bar
Duration 5:10 hr:min
Test volume 35 l
Setpoint 1 +20 °C
Setpoint 2 -95 °C
Reactor 50l QVF (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

Test Results

The PRESTO W91 Process system cools the reactor from +20 °C to the lowest temperature of -88 °C in 5:10 h.

Set point
Temperature in the application
Temperature in temperature control unit