Brochure

3
36
Thermostatic control head fits radiator valves.
Set point locking mechanism.
Range stop adjustment.
Built-in sensor with liquid-filled element.
Fits valve 220, 221, 338 and 339 series.
Graduated scale from
*
to 5 corresponding
to a temperature scale adjustment range of
45—82ºF (7—28ºC).
200
Thermostatic control head with remote
adjusting knob, liquid-filled element.
Fits valves 220, 221, 338, 339 & 676 series
(direct coupling).
Temperature range: 43—82°F (6—28°C).
Capillary length: 78 in. (2 m.)
472
THERMOSTATIC CONTROL HEADS
Thermostatic control head fits radiator valves.
With remote sensor.
Fits valve 220, 221, 338 and 339 series.
Graduated scale from
*
to 5 corresponding
to a temperature scale adjustment range of
45—82ºF (7—28ºC).
Capillary length: 78" (2 m).
201
Thermostatic control head fits radiator
valves; with contact probe.
Built-in sensor with liquid-filled element.
Fits valve 220, 221, 338 and 339 series.
The pre-set scale corresponds to
adjustment temperature range of
68—122ºF (20—50ºC).
Capillary length: 78" (2 m).
203
4490
ACCESSORIES
Code Description Lbs USD
200000 Built-in sensor 0.5 82.80
Code Description Lbs USD
201000 Remote sensor 1 148.00
Manual knob for thermostatic radiator
valves. Fits valves 220 and 221 series.
Code Description Lbs USD
449010 Manual knob 0.1 17.10
Thermo-electric actuator for electric control
of radiator valves.
Fits valves 220, 221, 338 and 339 series.
Low current draw.
Power supply: 24 V AC/DC.
Initial current draw: ≤ 250 mA.
Power consumption: 3 W, 6 VA.
31.5" wire lead connection.
6564
THERMO-ELECTRIC ACTUATOR
Code Description Lbs USD
656404 24 V AC/DC 0.4 114.00
656414 24 V AC/DC with microswitch 0.4 144.00
Code Description Lbs USD
203502 Remote sensor probe 0.5 281.00
Code Description Lbs USD
472000 Remote wall sensor 1 283.00
Function
The control mechanism of the
thermostatic radiator valve is a
proportional temperature controller,
composed of a liquid filled bellows.
With increasing temperature the
liguid expands which, in turn, causes
the bellows to expand. When the
temperature decreases the opposite
occurs; the bellows contracts allowing
the spring to return it to the original
position. By connection to the valve
stem, these movements adjust the heat
transfer medium to the radiator.
*Head shown vertical for illustration only,
it should be installed horizontally.
*
*
Key features
The thermostatic control head is filled with
a non compressible liquid bellows (1).
Plus, the radiator valve body has an extra
strong valve stem compression spring (2).
The non compressible liquid provides the
force required to compress the strong
valve stem spring. When the temperature
decreases, the liquid bellows contracts,
which allows the valve stem spring to lift
the valve plug from valve seat after long
periods of non-movement. This ensures
that after a long ‘off-season’, when the
actuator operates for the first time, the
spring reliably lifts the valve plug off the
seat without sticking. In addition, the
200000 control head features an easy-
to-use locking mechanism that prevents
unauthorized temperature set point
changes and a range stop adjustment
that limits the maximum temperature
setting to save energy and over-heating.
1
2