CAV controller variant VFC, with rotary knob
Variant with rotary knob
Conforms to VDI 6022
1 Damper blade
2 Leaf spring
3 Volume flow rate scale
4 Rotary knob locking screw
5 Rotary knob
6 Lip seal
7 Diagram with setting values
8 Bellows inlet
Functional description
The volume flow controllers work without an external power supply.
A damper blade with low-friction bearings is adjusted by aerodynamic forces such that a set volume flow rate is maintained within the differential pressure range.
The aerodynamic forces of the airflow create a closing torque on the damper blade.
The bellows extends and increases this force while at the same time acting as an oscillation damper.
The closing force is countered by a leaf spring. As the differential pressure changes, the leaf spring adjusts the position of the damper blade such that the volume flow rate is maintained almost exactly.
Efficient commissioning
The volume flow rate setpoint value can be set quickly and easily using the pointer on the external scale; no measurements are required.
The advantage over flow adjustment dampers is that there is no need for repeat measurements or adjustments by an air conditioning engineer. Should the system pressure change, e.g. by opening or closing of duct sections, the flow rates in the entire system will also change if flow adjustment dampers are used; however, this is not the case with mechanical self-powered volume flow controllers A mechanical self-powered controller reacts immediately and adjusts the damper blade such that the set constant volume flow rate is maintained.
Nominal sizes | 80 – 250 mm |
Volume flow rate range | 6 – 370 l/s or 22 – 1332 m³/h |
Volume flow rate control range | Approx. 10 – 100 % of the nominal volume flow rate |
Volume flow rate accuracy | Approx. ± 10 % of the nominal volume flow rate |
Minimum differential pressure | 30 Pa |
Maximum differential pressure | 500 Pa |
Operating temperature | 10 to 50 °C |
| VFC | / | 100 | / | E03 |
| | | | | | | ||
| 1 | 2 | 3 |
1 Type
VFC Volume flow controller
2 Nominal size [mm]
80, 100, 125, 160, 200, 250
3 Actuator
No entry: manual adjustment
E01 3-point (min/max) actuator 24 V AC/DC with potentiometer adjustment
E02 3-point (min/max) actuator 230 V AC/DC with potentiometer adjustment
E03 variable actuator 24 V AC/DC with potentiometer adjustment
M01 3-point (min/max) actuator 24 V AC/DC with mechanical stops
M02 3-point (min/max) actuator 230 V AC/DC with mechanical stops
Order example: VFC/100/E03
| Type | VFC |
| Nominal size [mm] | 100 |
| Actuator | 24 V AC/DC, modulating 0 – 10 V DC, potentiometer |
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Contact
Vă mulţumim pentru mesaj!
Mesajul dumneavoastră este trimis şi va fi procesat în curând.
Departamentul nostru de Cereri Service o să vă contacteze în cel mai scurt timp Pentru întrebări generale privind produsele sau serviciile puteţi suna şi la:
Tel.: +40 31 82 43 041 | Fax: +40 31 82 43 040
