ARI Armaturen TEMPTROL 774 EN - Manual (Page 4)

Page 22 Rev. 0040702000 1011
Operating and installation instructions
TEMPTROL
®
4.2 Operating principles
The temperature regulator TEMPTROL
®
is a self acting proportional controller for
temperature of fluid, gas and vapour media of Fluid Group I pursuant to Pressure
Equipment Directive 97/23/EC. No auxiliary energy is needed.
The temperature regulator is a combination of controller and valve and is working acc. to
the principle liquid expansion by changing temperatures.
- Thermal closing valves reduce the flow with rising sensor temperature (heating
application).
- Thermal opening valves raise the flow with rising sensor temperature (cooling
application).
- Thermal mixing valves mix 2 flows (inlet A and inlet B to outlet AB).
- Thermal diverting valves divert one flow into 2 flows (AB to A and B).
Mixing/diverting valves open inlet A and closes inlet B with rising temperature.
Valves are available in several materials for specific media e.g. heating water, steam,
thermal oil, coolant water (other media available on request).
- Thermal detectors acc. to DIN EN 14597 can only be adjusted to the intended value with
tools.
4.3 Diagram
Fig. 1: : Illustration of closing valve Fig. 771
with controller type 990038604 and manual
control device
(for other controller types refert to data sheet)
4.3.1 Parts
Pos. Designation
11 Bonnet (valve)
50.1 Sensor
50.4 Set-point indicator
50.13 Indicator unit
50.15 Capillary tube
50.16 Actuator
60 Manual control device
(accessory)