Type VFR

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

  • 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


Optional equipment and accessories

  • Actuator with potentiometer
  • Actuator with mechanical stops

Flow adjustment damper, variant VFR, with actuator (mechanical stops) 00132214_0
  • Application
  • Description

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

Special features

  • Diagram with setting values on each flow adjustment damper
  • Simple retrofit of an actuator is possible

Construction

  • Galvanised sheet steel
  • A2: Stainless steel

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

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

Construction features

  • Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180
  • Very good dimensional stability due to double grooves
  • Damper blade without seal but with perimeter gap of 3 mm

Materials and surfaces

  • Rotary knob, damper blade and bearings made of plastic, flame retardant (V-0) to UL 94


Galvanised sheet steel construction (P1)

  • Casing made of galvanised sheet steel


Stainless steel construction (A2)

  • Casing made of stainless steel 1.4301

Technical information

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
  • Produktbeziehungen
Schematic illustration of the VFR 00135860_0

① Damper blade

② Scale

③ Rotary knob

④ Rotary knob locking screw

⑤ Lip seal

⑥ Diagram with setting values

Functional description

For 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).

Nominal sizes80 – 250 mm
Volume flow rate range20 – 485 l/s or 72 – 1746 m³/h
Minimum differential pressure20 Pa
Maximum differential pressure1000 Pa
Operating temperature10 – 50 °C


Quick sizing: Sound pressure level

Nominal sizeVolume flow rateVolume flow rateΔpst [Pa]Δpst [Pa]Δpst [Pa]Δpst [Pa]Δpst [Pa]Δpst [Pa]Δpst [Pa]
Nominal sizeVolume flow rateVolume flow rate1020305080100200
Nominal sizeVolume flow rateVolume flow rateLPALPALPALPALPALPALPA
Nominal sizel/sm³/hdB(A)dB(A)dB(A)dB(A)dB(A)dB(A)dB(A)
80 20 72 25283032353641
80 30 108 30333537404145
80 40 144 33363841434549
80 50 180 36404244474853
100 30 109 27293134363844
100 45 163 32353739424348
100 60 217 36394144464852
100 75 272 40434548505256
125 50 180 28313336394147
125 70 252 33363841444651
125 95 342 37414346495055
125 120 432 41454750535459
140 60 215 25293134384047
140 90 323 31343740444551
140 120 431 35394245485056
140 150 538 39434549525459
150 70 252 26303236394148
150 105 378 31353741444652
150 140 504 35394245485056
150 170 619 37424448515358
160 80 612 27303336394148
160 120 432 33373942454753
160 155 558 38414447505157
160 195 702 41454750535459
180 100 358 25293235394148
180 150 540 31353841454753
180 200 720 35394245485056
180 250 900 38424548515359
200 125 450 26303337414351
200 185 665 32363942464855
200 245 882 36404347505259
200 310 1116 39444650545662
224 155 557 24283135394147
224 230 828 28323539424450
224 310 1115 32363842454753
224 385 1386 34384144484955
250 195 702 24283236414352
250 290 1043 28333640454756
250 385 1386 31364044495159
250 485 1746 34394347525462


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

  • Rotary knob, damper blade and bearings made of plastic, flame retardant (V-0) to UL 94


Galvanised sheet steel construction (P1)

  • Casing made of galvanised sheet steel


Stainless steel construction (A2)

  • Casing made of stainless steel 1.4301

Construction

  • Galvanised sheet steel
  • A2: Stainless steel

Technical data

  • Nominal sizes: 80 to 250 mm
  • Volume flow rate range: 9 to 615 l/s or 32 to 2215 m³/h
  • Minimum differential pressure: 20 Pa
  • Maximum differential pressure: 1000 Pa

00131367_0

 Type
VFR       Flow adjustment damper

 Material
       No entry: galvanised sheet steel
A2       Stainless steel

 

Nominal size [mm]
80
100
125
140
150
160
180
200
224
250

 Actuator
       No entry: manual operation
       potentiometer
E01       24 V AC/DC, 3-point
E02       230 V AC, 3-point
E03       24 V AC/DC, modulating 0 – 10 V DC
       Mechanical stops
M01       24 V AC/DC, 3-point
M02       230 V AC, 3-point


 

References

Hypercube, Moscow, Russia

  • Description
Project:
- Hypercube

Field of application:
- Office Building
 
Location:
- Moscow, Russia 
 
TROX-Products:
- Air-water-Systems: Multi-Service-Chilled-Beams, DID312, DID632
- Air diffusor: SL-A, TRS
- Acoustics: CA, MSA
- Control Units: TVJD-Easy, EN-D, VFR

ÖBB headquarters

  • Information about the Building
Project: ÖBB headquarters, Vienna
Application: Offices
Location: Vienna, Austria
Building type: new building
Year of completion: 2014
 







Construction company: 
HÖSBA Projektentwicklungs- und -verwertungsgesellschaft m.b.H. & Co KG,
BAI Bauträger Austria Immobilien GmbH; HABAU Hoch- und Tiefbaugesellschaft m.b.H.,
ÖSTU-STETTIN Hoch- und Tiefbau GmbH
Architect: Zechner & Zechner ZT GmbH
Designer: Moser & Partner Ingenieurbüro GmbH
 
Total air volume: app. 370.000 m3/h 
 

TROX-Products
  • Air diffusers: TR, TRS, FBA, VDW
  • Air-water systems / Decentralised Ventilation Systems: BID
  • Control units: RN, EN, TVR-Easy, TVJ-Easy, VFR, AK
  • Sound attenuators: CA, CS, CF, TX
  • Fire and Smoke Protection: FK-TA, FKRS-TA
  • External louvres: JZ-AL-HL
  • Fans
 

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