EN-Ex

Visual display of the damper blade position

Large dimensions as double version

Tested to VDI 6022

Conforms to VDI 6022

EN-EX

FOR PRECISE CONTROL OF NORMAL TO HIGH CONSTANT VOLUME FLOWS IN POTENTIALLY EXPLOSIVE ATMOSPHERES ACCORDING TO ATEX

Rectangular, mechanically self-powered air terminal units for supply and extract air
systems with constant air volume flows, approved and certified for potentially
explosive atmospheres (ATEX)

ATEX-compliant construction
Approved for gases, mists, vapours and dusts in zones 1, 2, 21 and 22
Suitable for volume flow rates up to 12600 m³/h or 3500 l/s
Volume flow rate adjustment from outside by rotary knob
High control accuracy
No on-site test measurements required for commissioning
Casing air leakage to EN 1751, class C
Visual display of the damper blade position for operating point optimisation

Optional equipment and accessories

Acoustic cladding for the reduction of case-radiated noise
Secondary silencer Type TX for the reduction of air-regenerated noise

General information

Application

Rectangular EXCONTROL-KVS control units for supply or extract air volume flow control in constant volume flow systems
For use in potentially explosive atmospheres (ATEX)
Mechanical self-powered volume flow control without external power supply
Simplified project handling by ordering based on nominal size

Special characteristics

ATEX mark and certification
ATEX equipment-group II, approved for zones 1, 2, 21 and 22
Setting of the volume flow setpoint from the outside by rotary knob
High control accuracy of the set volume flow rate
Correct operation even under unfavourable upstream conditions
Visual display of the damper blade position for operating point optimisation

Nominal sizes

19 nominal sizes from 200 × 100 – 600 × 600 mm

Variants

EN-Ex: Air terminal units
EN-EX-D: Air terminal units with acoustic cladding
Units with acoustic cladding and/or secondary silencer Type TX for demanding acoustic requirements

Construction

Galvanised sheet steel
P1: Powder-coated, silver grey (RAL 7001)
Parts and characteristics
Air terminal unit ready for commissioning
Damper blade with low-friction bearings
Bellows for vibration damping
Cam plate with leaf spring
Rotary knob pointer and scale for adjusting the flow rate setpoint
Each air terminal unit is tested in the factory on a special ventilation test rig
Visual display of the damper blade position for operating point optimisation
Terminal point for equipotential bonding
Enclosed ground cable (approx. 1 m length)

Classification

Zones 1 and 2 (atmosphere: gases): II 2G Ex h IIC T6 Gb
Zones 21 and 22 (atmosphere: dusts): II 2D Ex h IIIC T80°C Db

Useful additions

Secondary silencer Type TX

Construction features

Rectangular casing
Construction and materials comply with the EU directive for use in potentially explosive atmospheres (ATEX)
Flanges on both ends, suitable for duct connections
Air terminal units from H = 400 mm as double version (2 dampers with separate setting scales)

Material and surfaces

Galvanised sheet steel construction

Casing and damper blade made of galvanised sheet steel
Leaf spring made of stainless steel
Polyurethane bellows
Plain bearings with PTFE coating
Cam plate and adjusting unit made of galvanised sheet steel

Powder-coated construction (P1)

Casing and damper blade made of galvanised sheet steel, powder-coated
Leaf spring made of stainless steel
Polyurethane bellows
Plain bearings with PTFE coating
Cam plate and adjusting unit made of galvanised sheet steel

Variant with acoustic cladding (-D)

Acoustic cladding made of galvanised sheet steel
Rubber seal for the insulation of structure-borne noise
Lining made of mineral wool

Mineral wool

Acc. to EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008

Standards and guidelines

Meets the hygiene requirements of

EN 16798, Part 3
VDI 6022, Sheet 1
DIN 1946, Part 4
For further standards and guidelines, please refer to the hygiene certificate

Casing air leakage

EN 1751, Class C

ATEX Directive 2014/34/EU

Equipment and protective systems intended for use in potentially explosive atmospheres

Maintenance

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

Tehnički podaci

Schematic illustration of the EN-Ex EN-Ex_gc_01.ai.png

① Damper blade
② Bellows
③ Bellows inlet
④ Scale sticker
⑤ Connection for equipotential bonding
⑥ Visual display of the damper blade position
⑦ Rotary knob

Functional description

The air terminal unit is a mechanical self-powered unit and works without external power supply. A damper blade with low-friction bearings is adjusted by aerodynamic forces so that the set volume flow rate is kept constant within the differential pressure range. The aerodynamic forces of the airflow create a closing torque on the damper blade. An inflating bellows amplifies this force and at the same time acts as a damping element. The closing torque is countered by a leaf spring that unrolls over a cam plate. The cam plate is adapted in such a way that the damper blade moves when the differential pressure changes. As a result, the volume flow rate remains constant within narrow tolerances.

Efficient commissioning

Using the rotary knob, the desired volume flow setpoint can be set quickly on the external scale, no prior measurement required. The advantage over conventional flow adjustment dampers is that no repeated measurements or adjustments during commissioning are required. 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 air terminal units. The air terminal unit reacts immediately and keeps the set air volume constant.

Air terminal units in rectangular design for constant air volume systems, mechanically self-powered, without external power supply, for supply or extract air, in 19 nominal sizes. Air terminal unit ready for commissioning, consisting of the casing with smooth-running control damper, control bellows and external cam disc with leaf spring as well as components for equipotential bonding and explosion protection. The air terminal units are factory adjusted and preset to a reference air volume. Sound power level measured according to DIN EN ISO 5135. Meets the hygiene requirements according to VDI 6022. Meets the requirements of ATEX Directive 2014/34 EU.

Special features

ATEX mark and certification
ATEX equipment-group II, approved for zones 1, 2, 21 and 22
Setting of the volume flow setpoint from the outside by rotary knob
High control accuracy of the set volume flow rate
Correct operation even under unfavourable upstream conditions
Visual display of the damper blade position for operating point optimisation

Materials and surfaces

Galvanised sheet steel construction

Casing and damper blade made of galvanised sheet steel
Leaf spring made of stainless steel
Polyurethane bellows
Plain bearings with PTFE coating
Cam plate and adjusting unit made of galvanised sheet steel

Powder-coated construction (P1)

Casing and damper blade made of galvanised sheet steel,
powder-coated
Leaf spring made of stainless steel
Polyurethane bellows
Plain bearings with PTFE coating
Cam plate and adjusting unit made of galvanised sheet steel

Variant with acoustic cladding (-D)

Acoustic cladding made of galvanised sheet steel
Rubber seal for the insulation of structure-borne noise
Lining made of mineral wool

Mineral wool

Acc. to EN 13501, fire rating class A1, non-combustible
RAL quality mark RAL-GZ 388
Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008

Construction

Galvanised sheet steel
P1: Powder-coated, silver grey (RAL 7001)

Technical data

Nominal sizes: 200 × 100 to 600 × 600 mm
Volume flow rate range: 39 – 3500 l/s or 140 – 12600 m³/h
Volume flow rate control range: approx. 25 – 100 % of the nominal volume flow rate
Minimum differential pressure: 50 Pa
Maximum permissible differential pressure: 1000 Pa
Casing air leakage acc. to EN 1751, class C

Sizing data

qᵥ [m³/h]
Δpst [Pa]

Air-regenerated noise

LPA [dB(A)]

Case-radiated noise

LPA [dB(A)]

EN-Ex	–	D	–	P1	/	400 × 200
\|		\|		\|		\|
1		2		3		4

1 Type
EN-Ex Air terminal unit 2 Acoustic cladding
No entry: without acoustic cladding
D with acoustic cladding

3 Material
No entry: galvanised sheet steel
P1 Powder-coated RAL 7001 (silver grey)

4 Nominal size [mm]
Specify width × height

Order example: EN-Ex-D-P1/400×200

Type	EN-Ex
Acoustic cladding	with acoustic cladding
Material	Powder-coated RAL 7001 (silver grey)
Nominal size [mm]	Width 400, height 200

Preuzimanja

informacije o proizvodima

Product data sheet Type EN-Ex

EN-Ex_PD_2024_04_25_DE_en Product data sheet 680 KB pdf

certifikati

Declaration of hygiene conformity Type EN-Ex

EN-Ex_HC_2024_05_DE_en Hygiene certificate 1,5 MB pdf

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