Application:
The pressure independent control valve “Cocon QTZ” PN 25 with
automatic, differential pressure independent flow control is a valve
combination consisting of a flow regulator and a regulating valve.
The nominal value of the flow regulator can be set with the help of
an easily accessible handwheel. The regulating valve can be
equipped with a temperature controller or a manual head
(connection thread M 30 x 1.5).

The pressure independent control valve “Cocon QTZ” is designed
to be installed in heating and cooling systems with closed circuits
(like central and surface heating systems, fan coil units, chilled
ceilings, fan convectors etc.) for automatic flow control (hydronic
balancing). It can also be used for the control of another variable
(e.g. room temperature) by modifying the flow rate with the help of
actuators, thermostats or temperature controllers.

Technical data:
Performance data
Max. operating temperature: 120 °C
Min. operating temperature: -10 °C
Max. operating pressure: 25 bar (2500 kPa)
Medium: Water or mixtures of water and ethylene/propylene glycol (max.50 %)
ph value 6.5-10, according to VDI 2035/ÖNORM 5195
Max. closing pressure: 6 bar (600 kPa)
in the direction of flow