ARI Armaturen TEMPTROL 774 EN - Manual (Page 8)

Page 26 Rev. 0040702000 1011
Operating and installation instructions
TEMPTROL
®
- Flow direction:
5.2 Requirements at the place of installation
The place of installation should be easily accessible and provide ample space for
maintenance and removing the actuator and extracting the temperature sensor out of the
piping or tank. Install a stop valve upstream and downstream of the temperature regulator
to enable repair and maintenance work, without emptying the system. Also a strainer
should exist in front of the control valve (refer to point 5.5), to exclude wear between seat
and disc.
Insert thermometer to control the medium temperature. The piping diameters before and
behind the valve must ensure, that the allowed flow velocities are not exceeded.
- When insulating, the bonnet, actuator, capillary tube and temperature sensor must stay
free.
- The capillary tube of the temperature regulator must be installed in such a way that no
large temperature alterations and vibrations occur. The max. distance between the tube
holders is 250 mm. The min. bending radius is 50 mm. The connecting pipe is part of a
hydraulic system. It must not be disconnected or damaged.
- Temperature sensors (pos. 50.1) can be installed in systems with sensor pockets. The
sensor pocket enables easy installation, when a change is necessary the system must not
be emptied. Note the longer time constant!
- Installation with actuator hanging.
- Thermal closing valves:
The flow direction must correspond with the arrow on the valve body.
- Thermal opening valves (Inlet B closed):
Flow direction for thermal openting valves is preferably from A to B.
Inlet B must be closed with a blind flange.
(Flow direction from AB to A is possible, but not recommended, because oncoming
flow goes contrary the usual flow direction onto the plug.
- Thermal mixing/diverting valves:
When installing 3-way valves, it is important to distinguish between
mixing and diverting of flow.
- Mixing:
The flow media inlets are A and B (the warmer medium should
enter inlet B).
- Diverting:
The medium enters through inlet AB and exits out of outlets A and B.
In order to assure proper regulation, the pressures of both partial
flows (inflow for mixing or outflow for diverting) must be of equal
magnitude.
Please note, that with rising sensor temperature, inlet B (mixing) or
outlet B (diverting) are throttled.
The flow direction must correspond with the arrow on the valve
body.
Mixing function
Diverting