Variant with rotary knob Actuator with potentiometers Actuator with mechanical stops Tested to VDI 6022 04/2013 – DE/en Flow adjustment dampers Type VFR 3 VFR 3.2 – X XVFR testregistrierung K5 – 3.2 – 1 For the reliable balancing of volume flow rates Circular flow adjustment dampers for the adjustment of volume flow rates and pressures in supply air and extract air systems Optional equipment and accessories Each flow adjustment damper carries a diagram with setting values that ensure rapid commissioning on site Suitable for duct pressures up to 1000 Pa. Volume flow rate can be set using a rotary knob and a scale on the outside of the casing Simple retrofit of an actuator Casing air leakage to EN 1751, class C Actuator with potentiometer Actuator with mechanical stops H Y G I E N E T E S T E D V D I 6 0 2 2
Transcript
Variant with rotary knob
Actuator with potentio meters
Actuator with mechani cal stops
Tested to VDI 6022
04/2013 – DE/en
Flow adjustment dampersType VFR
3
VFR 3.2 –
X XVFRtestregistrierung
K5 – 3.2 – 1
For the reliable balancing of volume flow ratesCircular flow adjustment dampers for the adjustment of volume flow rates and pres sures in supply air and extract air systems
Optional equipment and accessories
Each flow adjustment damper carries a diagram with setting values that ensure rapid commissioning on siteSuitable for duct pressures up to 1000 Pa.Volume flow rate can be set using a rotary knob and a scale on the outside of the casingSimple retrofit of an actuatorCasing air leakage to EN 1751, class C
Actuator with potentiometerActuator with mechanical stops
HY
GIENE TESTED
VDI 6022
Flow adjustment dampersGeneral information
04/2013 – DE/en
VFR
3
Type
VFR General information 3.2 – 32Order code 3.2 – 35Aerodynamic data 3.2 – 36Quick sizing 3.2 – 37Dimensions and weight 3.2 – 38Specification text 3.2 – 39
Basic information and nomenclature 3.4 – 1
Page
K5 – 3.2 – 2
Diagram to determine the setting values on site (example for nominal size 200).
Type VFR – The System
① Flow adjustment damper VFR with rotary knob② Actuator E0* with potentiometers③ Actuator M0* with mechanical stops
Diagram with setting values
VFR 125
15 20 40 60 80 100 14020
3040506080
100
200
300400500
100 200 300 500
0 2 4
6
8
l/s
Pa
80
1 3 5
7
t150
30
VFR 100VFR 100VFR 125
m /h315060
Flow adjustment dampersGeneral information
04/2013 – DE/en
VFR
3
Application– Circular flow adjustment dampers Type VFR for
the simple balancing of volume flow rates and pressures in air conditioning systems
– Stepless adjustment of the volume flow rate using a rotary knob with position indicator
– Simple retrofit of an actuator– At the minimum setting (closed position 0) a
system pressure dependent leakage flow rate occurs
Attachments– Min/Max actuators: Actuators for switching
between minimum and maximum volume flow rate setpoint values
– Modulating actuators: Actuators for the stepless adjustment of volume flow rates
Special features– Diagram with setting values on each flow
adjustment damper– Simple retrofit of an actuator is possible
Parts and characteristics– Ready-to-install flow adjustment damper– Rotary knob with position indicator– Stepless adjustment from 0 to 10– Diagram with setting values– Lip seal
Materials and surfaces– Casing in galvanised sheet steel– Rotary knob, damper blade and bearings made
of plastic, flame retardant (V-0) to UL 94
Installation and commissioning– Any installation orientation– Volume flow rate setpoint can be set on
external scale
Standards and guidelines– Hygiene conforms to VDI 6022– Casing air leakage to EN 1751, class C
Maintenance– Maintenance-free as construction and
materials are not subject to wear
K5 – 3.2 – 3
Description
① Flow adjustment damper, variant VFR, with rotary knob
For detailed information on actuators see Chapter K5 – 2.2.
Technical data Nominal sizes 80 – 250 mmVolume flow rate range 20 – 485 l/sVolume flow rate range 72 – 1746 m³/hVolume flow rate control range approx. 10 – 100 % of the nominal volume flow rateDifferential pressure 20 – 1000 PaOperating temperature 10 – 50 °C
Flow adjustment dampersGeneral information
04/2013 – DE/en
VFR
3
Functional descriptionFor balancing the volume flow rates of duct sections and air terminal devices the differential pressure must be set on the flow adjustment dampers. The value to be set for a certain required volume flow rate at a given differential pressure can be taken from the diagram that each flow adjustment damper carries. This value can then be set using the rotary knob with the position indicator (stepless adjustment between 0 and 10).
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.
Circular flow adjustment dampers for the simple balancing of volume flow rates in air conditioning systems, for supply air and extract air, available in 10 nominal sizes.Suitable for duct pressures up to 1000 Pa.Ready-to-install unit consists of the casing with damper blade and rotary knob for the stepless adjustment of volume flow rates.Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180.Casing air leakage to EN 1751, class C.
Special features– Diagram with setting values on each flow
adjustment damper– Simple retrofit of an actuator is possible
Materials and surfaces– Casing in galvanised sheet steel– Rotary knob, damper blade and bearings made
E01 min/max switching, 24 V AC/DC supply voltage, potentiometer
E02 min/max switching, 230 V AC supply voltage, potentiometer
E03 variable volume flow, 24 V AC/DC supply voltage, potentiometer, control signal 0 to 10 V DC
M01 min/max switching, 24 V AC/DC supply voltage, mechanical stops
M02 min/max switching, 230 V AC supply voltage, mechanical stops
K5 – 3.2 – 9
Standard text
This specification text describes the general properties of the product. Texts for individual variants can be generated with our Easy Product Finder design programme.
Order options
04/2013 – DE/en
Basic information and nomenclature
3
3.4 –
X XBasic information and nomenclature testregistrierung
K5 – 3.4 – 1
Shut-off and flow adjustmentProduct selectionPrincipal dimensionsNomenclatureCorrection values for system attenuationMeasurementsSizing and sizing example
Shut-off and restrictionBasic information and nomenclature
04/2013 – DE/en
3
Type
AK AK-Ex AKK VFR
Type of systemSupply airExtract air
Duct connectionCircularRectangular
Volume flow rate rangeUp to [m³/h] 5435 5435 5435 1745Up to [l/s] 1510 1510 1510 485
Air qualityFilteredOffice extract airPollutedContaminated
Shut-off functionManualActuator – electric/pneumaticSafety function
RestrictionManualActuator – electric
Special areasPotentially explosive atmospheres
PossiblePossible under certain conditions: Robust unit variant and/or specific actuator or useful additional product Not possible
K5 – 3.4 – 2
Product selection
Shut-off and restrictionBasic information and nomenclature
04/2013 – DE/en
3
ØD [mm]Shut-off and flow adjustment dampers made of stainless steel: Outside diameter of the connecting spigotShut-off dampers made of plastic: Inside diameter of the connecting spigot
ØD₁ [mm]Pitch circle diameter of flanges
ØD₂ [mm]Outside diameter of flanges
ØD₄ [mm]Inside diameter of the flange screw holes
L [mm]Length of unit including spigot
L₁ [mm]Length of casing or acoustic cladding
n [ ]Number of flange screw holes
T [mm]Flange thickness
m [kg]Unit weight including the minimum required attachments
LPA [dB(A)]A-weighted sound pressure level of air- regenerated noise of the shut-off or flow adjustment damper, system attenuation taken into account
[m³/h] and [l/s]Volume flow rate
Δpst [%]Static differential pressure
All sound pressure levels are based on 20 μPa.
K5 – 3.4 – 3
Principal dimensions
Nomenclature
Definition of noise
LPA
① Air-regenerated noise② Case-radiated noise
Static differential pressure
st
Shut-off and restrictionBasic information and nomenclature
04/2013 – DE/en
3
K5 – 3.4 – 4
The quick sizing tables show the sound pressure levels that can be expected in a room both for the air-regenerated noise and for the case- radiated noise. The sound pressure level in a room results from the sound power level of the products – for a given volume flow rate and differential pressure – and the attenuation and insulation on site. This is why generally accepted attenuation and insulation values have been taken into account for the tables.
The distribution of air across the ductwork, changes of direction, end reflection, and room attenuation all affect the sound pressure level of the air-regenerated noise.Ceiling insulation and room attenuation influence the sound pressure level of the case-radiated noise.
Correction values for acoustic quick sizing
The correction values for the distribution in the ducting are based on the number of diffusers assigned to any one shut- off damper or flow adjustment damper. If there is just one diffuser (assumption: 140 l/s or 500 m³/h), no correction is necessary.
One change of direction, e.g. at the horizontal connection of the diffuser plenum box, has been taken into consideration for the system attenuation values. Vertical connection of the plenum box does not result in a system attenuation. Additional changes of direction result in lower sound pressure levels.
System attenuation per octave to VDI 2081 for the calculation of the air-regenerated noise
Centre fre quency
[Hz]
63 125 250 500 1000 2000 4000 8000ΔL
dB dB dB dB dB dB dB dBChange of direction 0 0 1 2 3 3 3 3
End reflection 10 5 2 0 0 0 0 0Room
attenuation 5 5 5 5 5 5 5 5
Octave correction for the distribution in the ducting, used to calculate the air-regenerated noise [m³/h] 500 1000 1500 2000 2500 3000 4000 5000 6000
Reducing the sound pressure level of the air-regenerated noise
① VAV terminal unit② Distribution in the ducting③ Change of direction
④ End reflection⑤ Ceiling insulation
Octave correction for the calculation of case-radiated noise
Centre fre quency
[Hz]
63 125 250 500 1000 2000 4000 8000ΔL
dB dB dB dB dB dB dB dBCeiling
insulation 4 4 4 4 4 4 4 4
Room attenuation 5 5 5 5 5 5 5 5
Shut-off and restrictionBasic information and nomenclature
04/2013 – DE/en
3
K5 – 3.4 – 5
Measurements
The acoustic data for the air-regenerated noise and case-radiated noise are determined according to EN ISO 5135. All measurements are carried out in a reverberation chamber to EN ISO 3741.
Measuring the air-regenerated noise
st
LPA
① Reverberation chamber② VAV terminal unit③ Microphone
④ Fan⑤ Sound attenuator
Measuring the case-radiated noise
st
LPA2
① Reverberation chamber② VAV terminal unit③ Microphone
④ Fan⑤ Sound attenuator
Shut-off and restrictionBasic information and nomenclature
04/2013 – DE/en
3
This catalogue provides convenient quick sizing tables for shut-off and flow adjustment dampers.The sound pressure levels for air-regenerated noise are provided for all nominal sizes. The quick sizing tables are based on normally accepted attenuation levels.Sizing data for other volume flow rates and differential pressures can be determined quickly and precisely using the Easy Product Finder design programme.
Given datamax = 280 l/s (1010 m3/h)Δpst = 150 PaRequired sound pressure level in the room 30 dB(A)
