VFR-introduction-image
VFR_img_04

Variant with rotary knob

VFR_img_06
Actuator with mechanical stops
VFR_img_05
Actuator with potentiometers

Conforms to VDI 6022

VFR-introduction-image
VFR_img_04
VFR_img_06
VFR_img_05

VFR 

For the reliable balancing of volume flow rates

Circular flow adjustment dampers for the balancing of volume flows 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 flows can be set using a hand wheel and a scale on the outside of the casing
■ Simple retrofit of an actuator
■ Casing air leakage according to EN 1751, class C

Optional equipment and accessories
■ Actuator with potentiometer
■ Actuator with mechanical stops

General information

Application
  • Circular flow adjustment dampers Type VFR for the simple balancing of volume flows and pressures in air conditioning systems
  • Continuous variable adjustment of the volume flow by means of a hand wheel with position indicator
  • Simple retrofitting of an actuator
  • Pressure dependent leakage airflow with minimal setting (setting 0)

Special characteristics
  • Diagram with setting values on each flow adjustment damper
  • Simple retrofitting of an actuator

Nominal sizes
  • 80, 100, 125, 140, 150, 160, 180 , 200, 224, 250

Construction
  • Galvanised sheet steel
  • A2: Stainless steel

Parts and characteristics
  • Ready-to-install flow adjustment damper
  • Hand wheel with position indicator
  • Continuous variable adjustment from 0 to 10
  • Diagram with setting values
  • Lip seal

Attachments
  • Min/Max actuators: actuators for switching between minimum and maximum volume flow setpoints
  • Modulating actuators: actuators for varying volume flow setpoints

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 with a 3 mm circumferential gap, without a seal

Material and surfaces
  • Hand wheel, damper blade and plain bearings made of plastic, flame retardant (V-0) to UL 94
Galvanised sheet steel variant
  • Casing made of galvanised sheet steel
Stainless steel variant (A2)
  • Casing made of stainless steel 1.4301

Standards and guidelines
  • Meets the hygiene requirements of VDI 6022
  • Casing air leakage according to EN 1751, class C

Maintenance
  • Maintenance-free as construction and materials are not subject to wear

Disclosure of Chemicals
  • RoHS EU Directive 2011/65/EU (RoHS)
    • This product or single variants comply with EU Directive 2011/65/EU (RoHS) on the restriction of the use of certain hazardous substances in electrical and electronic equipment. For more information, please refer to our Environmental Product Declarations.
  • REACH 1907/2006 (EC Regulation REACH)
    • This product or single variants comply with the provisions of EC Regulation No. 1907/2006, also known as REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). For more information, please refer to our Environmental Product Declarations.

Техническа информация

  • Function
  • TECHNICAL DATA
  • SPECIFICATION TEXT
  • ORDER CODE
Schematic illustration of the VFR VFR-Function

1 Damper blade
2 Volume flow scale
3 Hand wheel
4 Hand wheel locking screw
5 Lip seal
6 Diagram with setting values

For balancing the volume flows 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 at a given differential pressure can be taken from the diagram with setting values that each flow adjustment damper carries. This value can then be set using the hand wheel with the position indicator (continuous adjustment between 0 and 10).

Nominal sizes

80 – 250 mm

Volume flow range

20 – 485 l/s or 72 – 1746 m³/h

Minimum differential pressure

20 Pa

Maximum differential pressure

1000 Pa

Operating temperature

10 – 50 °C


Closed blade air leakage


NS

Δpst [Pa]

100

200

500

l/s

m³/h

l/s

m³/h

l/s

m³/h

80

9

32

13

46

20

72

100

13

45

18

64

28

101

125

16

58

23

82

36

130

140

17

61

25

89

39

140

150

18

66

26

93

41

148

160

21

76

30

107

47

169

180

19

69

27

98

43

155

200

21

74

29

105

46

166

224

22

80

32

114

50

180

250

25

89

35

125

55

198

This specification text describes just one variant of the product and applies to many applications. Texts for variants can be generated with our Easy Product Finder design programme.


Specification text
Circular flow adjustment dampers for the balancing of volume flow rates in ventilation and 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 which consists of the casing with damper blade and rotary knob for the infinitely variable adjustment of volume flow rates. Spigot with lip seal for
ducts according to EN 1506 or EN 13180. Casing leakage to EN 1751, class C.


Special features
  • Diagram with setting values on each flow adjustment damper
  • Simple retrofitting of an actuator

Materials and surfaces
  • Hand wheel, damper blade and plain bearings made of plastic, flame retardant (V-0) to UL 94
Galvanised sheet steel variant
  • Casing made of galvanised sheet steel
Stainless steel variant (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 range: 9 – 615 l/s or 32 – 2215 m³/h
  • Minimum differential pressure: 20 Pa
  • Maximum differential pressure: 1000 Pa

Sizing data
  • qv [m³/h]
  • Δpst [Pa]
Air-regenerated noise
  • LPA [dB(A)]
VFRA2/160/E01
||||
1234


1 Type
VFR
Flow adjustment damper

2 Material
No entry: galvanised sheet steel
A2 Stainless steel variant

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

4 Actuator
No entry: manual operation
E01 3-point (min/max) actuator 24 V AC/DC with potentiometer setting
E02 3-point (min/max) actuator 230 V AC/DC with potentiometer setting
E03 continuous 0 - 10 V DC actuator 24 V AC/DC with potentiometer setting
M01 3-point (min/max) actuator 24 V AC/DC with mechanical stops
M02 3-point (min/max) actuator 230 V AC/DC with mechanical stops

Order Example: VFR/160/M01

Nominal size160 mm
Actuator24 V AC/DC, mechanical stops

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Вашето съобщение е изпратено и ще бъде обработено в кратък срок.
Нашият отдел за Обслужване-Искания ще се свърже с Вас възможно най-скоро.
За общи въпроси относно продукти или услуги можете да се свържете също с:
Тел.: +359 2 981 25 74 | Факс: +359 2 986 20 65