CAV controllers Type RN-Ex
Circular, mechanical self-powered volume flow controllers for the control of supply air or extract air in constant air volume systems, approved and certified for potentially explosive atmospheres (ATEX)
Application
Special characteristics
Useful additions
Construction features
Materials and surfaces
Galvanised sheet steel constructionClassification
According to type examination certificate TÜV 05 ATEX 7159 XNominal sizes
80, 100, 125, 160, 200, 250, 315, 400Variants
Construction
Parts and characteristics
Standards and guidelines
Maintenance
Maintenance-free, as construction and materials are not subject to wear and tearAccessories
Functional description
The volume flow controller is a mechanical self-powered unit and works without external power supply. A damper blade with low- friction bearings is adjusted by aerodynamic forces such that the 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 that unrolls over a cam plate. The shape of the cam plate is such that a change in the differential pressure leads to an adjustment of the damper blade in a way 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 – 400 mm |
Volume flow rate range | 11 – 1400 l/s or 40 – 5040 m³/h |
Volume flow rate control range | Approx. 25 – 100% of the nominal volume flow rate |
Scale accuracy | ± 4 % |
Minimum differential pressure | 50 Pa (nominal size 80: 100 Pa) |
Maximum differential pressure | 1000 Pa |
Operating temperature | 10 – 50 °C |
5 Accessories
No entry: without accessories
D2 Double lip seal both ends
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Kontakt
Sme tu pre vás
Uveďte prosím vašu správu a druh otázky
Tel.: +420 283 880 380 | Fax: +420 286 881 870
Kontakt
Ďakujeme vám za správu!
Vaša správa je odoslaná a čoskoro bude spracovaná.
Naše servisné oddelenie sa s vami čo najrýchlejšie spojí Pre obecné informácie o výrobkoch alebo službách môžete tiež zavolať:
Tel.: +420 283 880 380 | Fax: +420 286 881 870
