Application
Special features
Nominal sizes
Variants
Construction
Parts and characteristics
Attachments
Accessories
Useful additions
Construction features
Materials and surfaces
Galvanised sheet steel construction
Powder-coated construction (P1)
Stainless steel construction (A2)
Variant with acoustic cladding (-D)
Mineral wool
Standards and guidelines
Maintenance
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.
Volume flow rate ranges
The minimum differential pressure of CAV controllers is an important factor in designing the ductwork and in rating the fan including speed control.
Sufficient duct pressure must be ensured for all operating conditions and for all control units. The measurement points for fan speed control must be selected accordingly.
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 to 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 |
Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design programme.
The first selection criteria for the nominal size are the actual volume flow rates qvmin and qvmax. The quick sizing tables are based on generally accepted attenuation levels. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required.
Sizing example
Given data
Vmax = 280 l/s (1010 m3/h)
Δpst = 150 Pa
Required sound pressure level in the room 35 dB(A)
Quick sizing
RN/200 with circular silencer CF 050/200×1000
Air-regenerated noise LPA = 26 dB(A)
Case-radiated noise LPA = 31 dB(A)
RN, Sound pressure level at differential pressure 150 Pa
80 | 11 | 40 | 37 | 24 | 17 | 15 | 22 | <15 |
80 | 20 | 72 | 39 | 27 | 19 | 17 | 24 | <15 |
80 | 40 | 144 | 47 | 34 | 24 | 22 | 31 | <15 |
80 | 45 | 162 | 48 | 35 | 25 | 24 | 32 | <15 |
100 | 22 | 79 | 37 | 24 | 17 | 15 | 22 | <15 |
100 | 40 | 144 | 40 | 29 | 22 | 20 | 21 | <15 |
100 | 70 | 252 | 47 | 35 | 27 | 26 | 29 | <15 |
100 | 90 | 324 | 50 | 38 | 30 | 29 | 33 | <15 |
125 | 35 | 126 | 37 | 27 | 21 | 18 | 15 | <15 |
125 | 60 | 216 | 43 | 34 | 27 | 25 | 19 | <15 |
125 | 115 | 414 | 50 | 41 | 35 | 33 | 27 | <15 |
125 | 140 | 504 | 52 | 44 | 39 | 37 | 30 | <15 |
160 | 60 | 216 | 40 | 32 | 26 | 24 | 29 | <15 |
160 | 105 | 378 | 45 | 37 | 32 | 29 | 33 | <15 |
160 | 190 | 684 | 49 | 41 | 35 | 33 | 39 | <15 |
160 | 240 | 864 | 50 | 41 | 36 | 34 | 41 | 16 |
200 | 90 | 324 | 40 | 31 | 24 | 22 | 28 | <15 |
200 | 160 | 576 | 43 | 35 | 28 | 26 | 32 | <15 |
200 | 300 | 1080 | 48 | 40 | 33 | 32 | 40 | 17 |
200 | 360 | 1296 | 49 | 41 | 35 | 33 | 42 | 20 |
250 | 145 | 522 | 41 | 32 | 24 | 22 | 29 | 15 |
250 | 255 | 918 | 42 | 34 | 28 | 26 | 33 | <15 |
250 | 470 | 1692 | 46 | 39 | 33 | 31 | 40 | 19 |
250 | 580 | 2088 | 48 | 41 | 35 | 34 | 43 | 22 |
315 | 230 | 828 | 39 | 33 | 26 | 23 | 30 | <15 |
315 | 400 | 1440 | 42 | 35 | 29 | 27 | 35 | <15 |
315 | 750 | 2700 | 44 | 38 | 32 | 31 | 40 | 19 |
315 | 920 | 3312 | 46 | 41 | 35 | 34 | 43 | 23 |
400 | 350 | 1260 | 46 | 39 | 33 | 29 | 45 | <15 |
400 | 610 | 2196 | 48 | 42 | 36 | 32 | 49 | 18 |
400 | 1130 | 4068 | 50 | 44 | 38 | 35 | 54 | 24 |
400 | 1400 | 5040 | 51 | 45 | 40 | 37 | 56 | 27 |
① RN without silencer
② RN with circular silencer CF, insulation thickness 50 mm, length 500 mm
③ RN with circular silencer CF, insulation thickness 50 mm, length 1000 mm
④ RN with circular silencer CF, insulation thickness 50 mm, length 1500 mm
⑤ RN-D (with acoustic cladding)
Circular volume flow controllers for constant air volume systems, 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 and leaf spring.
Volume flow controllers without actuators 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
Galvanised sheet steel construction
Powder-coated construction (P1)
Stainless steel construction (A2)
Variant with acoustic cladding (-D)
Mineral wool
Construction
Technical data
Sizing data
Air-regenerated noise
Case-radiated noise
This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.
Life cycle assessment
A life cycle assessment is available for the product series in form of an Environmental Product Declaration (EPD) that has been checked and published by a programme holder.
Notes on the order code
RN-S
RN
Order example: RN/160/D2
Nominal size | 160 |
Material | Galvanised sheet steel |
Accessories | Lip seal on both ends |
Order example: RN-D-FL/250/G2/B50
Acoustic cladding | With |
Flange | Both ends |
Material | Galvanised sheet steel |
Nominal size | 250 |
Accessories | Matching flanges for both ends |
Actuator | B50 |
RN-S
RN
RN-D
RN-FL
RN-D-FL
Materials
– | Casing | Galvanised sheet steel | |
– | Damper blade | Stainless steel, material no. 1.4301 | Nominal size 80 |
– | Damper blade | Stainless steel, material no. 1.4310 | Nominal sizes: 100, 125 |
– | Damper blade | Galvanised sheet steel | Nominal sizes from 160 |
– | Shaft | Stainless steel, material no. 1.4301 | Nominal sizes 80 to 200 |
– | Shaft | Stainless steel, material no. 1.4104 | Nominal sizes 250 to 400 |
– | Plain bearings | Steel with PTFE coating | |
D | Acoustic cladding | Galvanised sheet steel | |
D | Rubber profile for the insulation of structure-borne noise | Rubber | |
D | Lining | Mineral wool | |
P1 | Casing | Galvanised sheet steel | Powder-coated |
P1 | Damper blade | Stainless steel, material no. 1.4301 | Nominal size 80 |
P1 | Damper blade | Stainless steel, material no. 1.4310 | Nominal sizes: 100, 125 |
P1 | Damper blade | Galvanised sheet steel | Powder-coated, nominal sizes from 160 |
P1 | Shaft | Stainless steel, material no. 1.4301 | Nominal sizes 80 to 200 |
P1 | Shaft | Stainless steel, material no. 1.4305 | Nominal sizes 250 to 400 |
P1 | Plain bearings | Bronze with PTFE coating | |
A2 | Casing | Stainless steel, material no. 1.4301 | |
A2 | Damper blade | Stainless steel, material no. 1.4301 | Nominal size 80 |
A2 | Damper blade | Stainless steel, material no. 1.4310 | Nominal sizes: 100, 125 |
A2 | Damper blade | Stainless steel, material no. 1.4301 | Nominal sizes from 160 |
A2 | Shaft | Stainless steel, material no. 1.4301 | Nominal sizes 80 to 200 |
A2 | Shaft | Stainless steel, material no. 1.4305 | Nominal sizes 250 to 400 |
A2 | Plain bearings | Bronze with PTFE coating |
Surfaces
– | Casing | Galvanised steel |
P1 | Casing | Powder-coated, RAL 7001, silver grey |
A2 | Casing | Stainless steel construction |
RN, actuators
Min/Max actuators | |||
B50 | Actuator with mechanical stops TROX/Belimo | 24 V AC/DC | – |
B52 | Actuator with mechanical stops TROX/Belimo | 24 V AC/DC | 2 |
B60 | Actuator with mechanical stops TROX/Belimo | 230 V AC | – |
B62 | Actuator with mechanical stops TROX/Belimo | 230 V AC | 2 |
Modulating actuators | |||
B70 | Actuator with mechanical stops TROX/Belimo | 24 V AC/DC | – |
B72 | Actuator with mechanical stops TROX/Belimo | 24 V AC/DC | 2 |
Anbauteile: VARYCONTROL Regelkomponenten
Easyregler | Dynamisch | |||||||||||||||||
Easy | V | Integriert | Integriert | ① | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
Compactregler | Dynamisch | |||||||||||||||||
BC0 | V | MP-Bus | Integriert | Integriert | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BF0 | V | MP-Bus | Integriert | Integriert | ② | ● | ||||||||||||
BL0 | V | LonWorks | Integriert | Integriert | ② | ● | ● | ● | ● | ● | ● | ● | ||||||
BM0 | V | Modbus | Integriert | Integriert | ② | |||||||||||||
BM0-J6 | V | Modbus und steckerfertiger Anschlussleitung | Integriert | Integriert | ② | |||||||||||||
XG0 | V | Integriert | Integriert | ③ | ● | |||||||||||||
XB0 | V | Integriert | Integriert | ③ | ● | ● | ● | ● | ● | ● | ● | |||||||
LN0 | V | Integriert | Integriert | ⑤ | ● | ● | ● | ● | ● | ● | ● | |||||||
LK0 | V | KNX | ⑤ | |||||||||||||||
LY0 | V | Integriert | Integriert | ⑤ | ● | |||||||||||||
Compactregler | Statisch | |||||||||||||||||
SA0 | V | Integriert | Integriert | ④ | ||||||||||||||
SC0 | Δp | Integriert | Schnelllaufender Stellantrieb integriert | ④ | ||||||||||||||
Universalregler | Dynamisch | |||||||||||||||||
B11 | V | Integriert | Stellantrieb, Drehmoment für TVT | ② | ● | |||||||||||||
B13 | V | Integriert | Stellantrieb | ② | ● | ● | ● | ● | ● | ● | ||||||||
B27 | V | Integriert | Stellantrieb | ② | ● | |||||||||||||
B1B | V | Integriert | Federrücklaufantrieb | ② | ● | ● | ● | ● | ● | ● | ● | |||||||
XC3 | V | Integriert | Federrücklaufantrieb | ③ | ● | ● | ● | ● | ● | ● | ● | |||||||
Universalregler | Statisch | |||||||||||||||||
BP1 | V | MP-Bus | Separates Bauteil | Stellantrieb, Drehmoment für TVT | ② | ● | ||||||||||||
BP3 | V | MP-Bus | Separates Bauteil | Stellantrieb | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BPB | V | MP-Bus | Separates Bauteil | Federrücklaufantrieb | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BPG | V | MP-Bus | Separates Bauteil | Schnelllaufender Stellantrieb | ② | ● | ● | ● | ● | ● | ● | ● | ● | ● | ||||
BB1 | V | Separates Bauteil | Stellantrieb, Drehmoment für TVT | ② | ● | |||||||||||||
BB3 | V | Separates Bauteil | Stellantrieb | ② | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
BBB | V | Separates Bauteil | Federrücklaufantrieb | ② | ● | ● | ● | ● | ● | ● | ● | |||||||
XD1 | V | Integriert | Stellantrieb | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
XD3 | V | Integriert | Federrücklaufantrieb | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
BR1 | Δp | MP-Bus | 100 Pa | Stellantrieb, Drehmoment für TVT | ② | ● | ||||||||||||
BR3 | Δp | MP-Bus | 100 Pa | Stellantrieb | ② | ● | ● | ● | ● | ● | ● | ● | ||||||
BRB | Δp | MP-Bus | 100 Pa | Federrücklaufantrieb | ② | ● | ● | ● | ● | ● | ● | ● | ● | |||||
BRG | Δp | MP-Bus | 100 Pa | Schnelllaufender Stellantrieb | ② | ● | ● | ● | ● | ● | ● | |||||||
BS1 | Δp | MP-Bus | 600 Pa | Stellantrieb, Drehmoment für TVT | ② | ● | ||||||||||||
BS3 | Δp | MP-Bus | 600 Pa | Stellantrieb | ② | ● | ● | ● | ● | |||||||||
BSB | Δp | MP-Bus | 600 Pa | Federrücklaufantrieb | ② | ● | ● | ● | ● | |||||||||
BSG | Δp | MP-Bus | 600 Pa | Schnelllaufender Stellantrieb | ② | ● | ● | ● | ● | |||||||||
BG1 | Δp | 100 Pa | Stellantrieb, Drehmoment für TVT | ② | ● | |||||||||||||
BG3 | Δp | 100 Pa | Stellantrieb | ② | ● | ● | ● | ● | ● | ● | ● | |||||||
BGB | Δp | 100 Pa | Federrücklaufantrieb | ② | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
BH1 | Δp | 600 Pa | Stellantrieb, Drehmoment für TVT | ② | ● | |||||||||||||
BH3 | Δp | 600 Pa | Stellantrieb | ② | ● | ● | ● | |||||||||||
BHB | Δp | 600 Pa | Federrücklaufantrieb | ② | ● | ● | ● | ● | ||||||||||
XE1 | Δp | Integriert, 100 Pa | Stellantrieb | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
XE3 | Δp | Integriert, 100 Pa | Federrücklaufantrieb | ③ | ● | ● | ● | ● | ● | ● | ● | ● | ||||||
XF1 | Δp | Integriert, 600 Pa | Stellantrieb | ③ | ● | ● | ● | ● | ||||||||||
XF3 | Δp | Integriert, 600 Pa | Federrücklaufantrieb | ③ | ● | ● | ● | ● |
① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens
☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck
Anbauteile: VARYCONTROL Regelkomponenten
Easylabregler | Statisch | |||||
Elab | RS, RE, PC, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elab | RS, PC, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elab | RE, PC, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elab | RS, RE, PC, FH, C | TCU3 | Integriert | Schnelllaufender Stellantrieb | ||
Elektronischer Regler | Statisch | Elektronischer Regler | ||||
TMA | RS, RE, PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RS, RE, PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
TMA | RS, RE, | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RS, RE, | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
TMA | RE ,PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RE ,PC | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
TMA | RS, RE ,PC, FH | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb | ||
TMB | RS, RE ,PC, FH | TCU-LON-II mit LonWorks-Schnittstelle | Integriert | Schnelllaufender Stellantrieb (bürstenloser Motor) | ||
XF3 | Δp | Integriert, 600 Pa | Federrücklaufantrieb | ③ | ||
BB3 | V | Separates Bauteil | Stellantrieb | ② |
① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens
☒ Bestellschlüsseldetail, V Volumenstrom, Δp Differenzdruck
Installation and commissioning
Upstream conditions
The volume flow rate accuracy ΔV applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream.
Free air intake only with a straight duct section of 1D upstream.
Space required for commissioning and maintenance
Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.
Space required
Without actuator | 200 | 200 | 200 |
With actuator | 200 | 320 | 300 |
Prinipal dimensions
ØD [mm]
Outside diameter of the spigot
ØD₁ [mm]
Pitch circle diameter of flanges
ØD₂ [mm]
Outside diameter of flanges
ØD₄ [mm]
Inside diameter of the screw holes of flanges
L [mm]
Length of unit including connecting spigot
L₁ [mm]
Length of casing or acoustic cladding
H₁ [mm]
Screw hole pitch of flange (vertical)
n [ ]
Number of flange screw holes
T [mm]
Flange thickness
m [kg]
Unit weight including the minimum required attachments for manual adjustment
fm [Hz]
Octave band centre frequency
LPA [dB(A)]
A-weighted sound pressure level of air-regenerated noise of the CAV controller, system attenuation taken into account
LPA1 [dB(A)]
A-weighted sound pressure level of air-regenerated noise of the CAV controller with secondary silencer, system attenuation taken into account
LPA2 [dB(A)]
A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit, system attenuation taken into account
qvnom [m³/h] and [l/s]
Nominal volume flow rate (100 %)
qv [m³/h] and [l/s]
Volume flow rate
ΔV [± %]
Volume flow rate accuracy in relation to the setpoint (tolerance)
Δpst [Pa]
Static differential pressure
Δpst min [Pa]
Static differential pressure, minimum
Galvanised sheet steel
Powder-coated surface (P1)
Stainless steel (A2)
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We are here for you
Please specify your message and type of request.
Tel.: +43 1 250 43-0 | Fax: +43 1 250 43 34
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +43 1 250 43-0| Fax: +43 1 250 43 34