Both of the large fuel stills (the FFS and the Charles 803)
require the use of an automatic valve in order to regulate the
internal reflux temperature of the still. For years the plans
have called for a Johnson control valve, V47AA-aC, 2C or
V47AB-3C or 4C. However, today, we have another option with the
Sterlco type 56T. The Sterlco Type 56T 140-240 is the same thing
as a V47AB-4C, however, it is more sensitive to temperature
change and will maintain the internal temperature more
consistently than the Johnson valve, making it more suitable for
column still use.
This thermostatic cooling control valve has everything you need
for reliable temperature control. The Sterlco® 56-T Temperature
Actuated Water Regulating Valve evenly regulates cooling water
and other fluids in the most rugged applications. It’s ideal for
hydraulic power packaged equipment, hydraulic presses or
wherever reliable performance is required. The 56-T Valve is
available in six different temperature ranges. To ensure
dependability, every valve is factory-tested three times in
different temperature baths. For the temperature control you
need, get the valve that can deliver.