EN-Ex

CAV controllers Type EN-Ex

Visual display of the damper blade position

Unit with two controllers

Tested to VDI 6022

Getest volgens VDI 6022

ATEX-Zertifizierung

ATEX certification

EN-EX

For the precise control of norma to high constant volume flows in potentially explosive atmospheres (ATEX)

Rectangular, mechanical self-powered volume flow controllers for the control of supply air or extract air in constant air volume systems, 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 12,600 m³/h or 3,500 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 tested to EN 1751, class C
Visual display of 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

Initialize order code

General information

Application

Rectangular EXCONTROL CONSTANTFLOW CAV controllers of Type EN for supply air / extract air volume flow control in constant air volume systems
For use in potentially explosive atmospheres (ATEX)
Mechanical self-powered volume flow control without external power supply
Simplified project handling with orders based on nominal size

Special characteristics

ATEX mark and certification
ATEX equipment-group II, approved for zones 1, 2, 21 and 22
Volume flow rate setpoint can be set from outside by rotary knob
High control accuracy of the set volume flow
Any installation orientation
Correct operation even under unfavourable upstream conditions
Visual display of 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: Volume flow controller 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

Classification

Zones 1 and 2 (atmosphere: gases): II 2 G c II T5/T6
Zones 21 and 22 (atmosphere: dusts): II 2 D c II T 80 °C

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 sides, suitable for duct connection
Air terminal units from H = 400 mm as double version (2 dampers with separate setting scales)

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

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

Technical information

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.

Nominal sizes	200 × 100 – 600 × 600 mm
Volume flow rate range	39 – 3500 l/s or 140 – 12600 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
Maximum differential pressure	1000 Pa
Operating temperature	10 to 50 °C

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design program.

Specification text

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. Unit consists of the casing with damper blade with low friction bearings, bellows, and external cam plate with leaf spring. 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
Any installation orientation
Correct operation even under unfavourable upstream conditions
Visual display of 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 profile for the insulation of structure-borne noise
Lining is 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 differential pressure: 1000 Pa
Casing air leakage to EN 1751, class C

Sizing Data

qᵥ [m³/h]
Δp_st [Pa]

Air-regenerated noise

L_PA [dB(A)]

Case-radiated noise

L_PA [dB(A)]

1 Type
EN-Ex Volume flow controllers

2 Acoustic cladding
No entry: none
D With acoustic cladding

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

4 Nominal size [mm]
Specify size width × height

Order example: EN-Ex-D-P1/400×200

Downloads

product information

Product data sheet Type EN-Ex

EN-Ex_PD_2023_08_23_DE_en Product data sheet 670 KB pdf

certificates

Declaration of hygiene conformity Type EN-Ex

EN-Ex_HC_2020_06_08_DE_en Hygiene certificate 1,5 MB pdf
Leakage classification of TROX ventilation components

LC_v1_2023_11_DE_en Certificate 650 KB pdf

operation manuals

Installation manual EN-Ex

EN-Ex_IM_A00000074507_V5_2023_05_GB_en Installation manual 820 KB pdf

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EN-EX

For the precise control of norma to high constant volume flows in potentially explosive atmospheres (ATEX)

General information

Technical information

Downloads

product information

Product data sheet Type EN-Ex

certificates

Declaration of hygiene conformity Type EN-Ex

Leakage classification of TROX ventilation components

operation manuals

Installation manual EN-Ex

TROX Services

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STATISTICS AND WEBSITE ANALYSIS

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