Circular volume flow controllers for constant and variable air volume systems with low airflow velocities, mechanical self-powered, without external power supply, suitable for supply or extract air, available in 6 nominal sizes. Ready-to-commission unit consists of the casing containing a damper blade with low-friction bearings, bellows, leaf spring, and a rotary knob to set the volume flow rate setpoint.

SPECIAL CHARACTERISTICS
- Setting the volume flow setpoint without adjustment device from the outside on a scale
- Simple retrofit of an actuator is possible
- Perfect function even with upstream conditions and downstream conditions (straight upstream section 1,5D)
- Any installation orientation
- Factory functional testing of each unit using a dedicated test rig

MATÉRIAUX ET SURFACES
- Casing made of galvanised sheet steel
- Damper blade and other components made of high quality plastic, to UL 94, V1; to DIN 4102 material classification B2
- Leaf spring made of stainless steel
- Polyurethane bellows

TYPE DE RACCORDEMENT
Spigot with lip seal, suitable for circular ducts to EN 1506 or EN 13180

CARACTÉRISTIQUES TECHNIQUES
- Flow rate range: 22 - 234 m³/h
- Volume flow rate control range: approx. 10 - 100 % of nominal volume flow rate
- Minimum differential pressure: 30 Pa
- Maximum permissible differential pressure: 500 Pa
- Casing air leakage according to EN 1751, class C

MODÈLES
100 Diamètre nominal: 100
Composant de régulation: VFC_Title_00H

PRODUCT DATA
Débit qv 234 m³/h
Static differential pressure Δpst 50 Pa
Vitesse du débit d'air v 8,62 m/s
Static differential pressure, minimum Δpst,min 30 Pa
Air-regenerated noise Lp,A 40 dB(A)
Bruit rayonné Lp,A 27 dB(A)
System attenuation for air-regenerated noise ΔL1 *) 8 dB
System attenuation for case-radiated noise ΔL2 *) 9 dB

*) Remarques
System attenuation for air-regenerated noise ΔL1: Die Berechnung des Schalldruckpegels des Strömungsgeräusches erfolgte unter Berücksichtigung einer praxisgerechten Systemdämpfung. Diese Systemdämpfung ist die Summe der Korrekturwerte für eine Umlenkung, für die Verteilung im Luftleitungssystem, die Mündungsreflexion und die Raumdämpfung.
System attenuation for case-radiated noise ΔL2: Die Berechnung des Schalldruckpegels des Abstrahlgeräusches erfolgte unter Berücksichtigung einer praxisgerechten Systemdämpfung. Diese Systemdämpfung ist die Summe der Korrekturwerte für die Deckendämmung und die Raumdämpfung.

Résultats acoustiques
Air-regenerated noise, sound power level Case-radiated noise, sound power level
LW,A [dB(A)] 48 36
63Hz [dB] 57 45
125Hz [dB] 59 47
250Hz [dB] 51 39
500Hz [dB] 45 33
1kHz [dB] 39 27
2kHz [dB] 33 21
4kHz [dB] 22 < 15
8kHz [dB] 18 < 15
LW,NC [dB] 44 28
LW,NR [dB] 43 29

Manufacture of the planning: TROX GmbH
Series: VFC/100