Application
Special features
Variants
Construction
Parts and characteristics
Accessories
Useful additions
Construction features
Materials and surfaces
RN-Ex-D:
Mineral wool
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.
Circular volume flow controllers for constant air volume systems in potentially explosive atmospheres, mechanical self-powered, without external power supply, suitable for supply or extract air, available in 8 nominal sizes.
Ready-to-commission unit consists of the casing containing a damper blade with low-friction bearings, bellows, external cam plate with leaf spring, and parts for equipotential bonding and for protection in potentially explosive atmospheres.
Volume flow controllers are factory set to a reference volume flow rate (customers can set the required volume flow rate on site).
Spigot with groove for lip seal, suitable for connecting ducts according to EN 1506 or EN 13180.
Casing air leakage to EN 1751, class C.
Special features
Materials and surfaces
RN-Ex-D:
Mineral wool
Construction
Technical data
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Hol tartózkodik Ön?
Adja meg üzenetét és kérése típusát
Tel.: +36 (1)212-1211 | Fax: +36 (1)212-0735
Kapcsolat
Köszönjük üzenetét!
Az üzenet elküldve, hamarosan feldolgozzuk. Szervizigényekkel foglalkozó részlegünk a lehető leghamarabb felveszi Önnel a kapcsolatot.
Általános, termékekkel, szolgáltatásokkal kapcsolatos kérdéseivel a következő telefonszámokon is fordulhat hozzánk:
Tel.: +36 (1)212-1211 | Fax: +36 (1)212-0735