ARK2_img_03psd.png
Pressure relief damper, variant ARK2

ARK2_img_05bpsd.png
Closed blade

Closed blade

ARK2_img_01bpsd.png
Open blade

Open blade

ARK2_img_03psd.png
ARK2_img_05bpsd.png
ARK2_img_01bpsd.png

ARK2 

FOR THE PREVENTION OF EXCESS PRESSURE IN ROOMS

Pressure relief dampers for gas fire extinguishing systems and transformer substations

  • Air leakage with back pressure to EN 1751, class 4
  • Maximum differential pressure: 5000 Pa
  • The differential pressure can be adjusted from 50 – 1000 Pa (B > 600 mm: 600 Pa max.)
  • Blades made of aluminium, casing made of galvanised steel
  • Blades open when the maximum differential pressure is exceeded and close automatically when the pressure drops
  • Blade locking with permanent magnet
  • Robust, maintenance-free construction
  • Available in standard sizes and many intermediate sizes
  • Operating temperature 0 to 80 °C

 

Optional equipment and accessories

  • Installation subframe
  • Powder coating (RAL or DB)
  • Stainless steel construction with stainless steel casing; blades made of aluminium

 

 

 


General information

Application

  • Pressure relief dampers for the protection of internal spaces from differential pressures higher than set maximum levels
  • When the set maximum differential pressure is exceeded, the blades automatically open to relieve the excess pressure
  • Pressure peaks will be reliably controlled
  • The differential pressure can be adjusted from 50 – 1000 Pa (B > 600 mm: 600 Pa max.)


Special features

  • Robust, maintenance-free construction
  • Maximum differential pressure: 5000 Pa
  • Air leakage with back pressure, in closing direction, to EN 1751, class 4
  • Damper for negative or positive pressure (air extract or discharge)
  • Operating temperature 0 to 80 °C
  • Maintenance-free DU bearings with Teflon coating, bearing shafts made of stainless steel
  • Each blade is locked with a factory set permanent magnet
  • Adjustable differential pressure for blade opening: 50 – 1000 Pa, depending on width


Nominal sizes

  • B: 200, 400, 600, 800, 1000, 1200 mm (intermediate sizes: 201 – 1199 mm, in increments of 1 mm)
  • H: 345, 675, 1005, 1335, 1665, 1995 mm (intermediate sizes 355 – 505, 685 – 835, 1015 – 1165, 1345 – 1495, 1675 – 1825 mm in increments of 1 mm)
  • Any combination of B × H


Construction

  • Galvanised sheet steel, duct connection without flange holes
  • A2: Stainless steel
  • G: Duct connection with flange holes


Parts and characteristics

  • Ready-to-install pressure relief damper
  • Blades with low-friction bearings
  • One retaining element with a permanent magnet for each blade
  • Seal
  • Travel stop (angle section)


Construction features

  • Rectangular casing, material thickness 2 mm
  • Blades, material thickness 3 mm
  • Flanges on both sides, suitable for duct connection, with or without flange holes
  • Adjustable retaining element to adapt to various pressures (factory set as ordered)
  • Blades can be moved independent of complementary to one another
  • Blades with perimeter seal, pressed against travel stop (angle section) when closed
  • Blade shafts with maintenance-free plastic bearings


Materials and surfaces

  • Casing and travel stop (angle section) made of galvanised sheet steel, material no. EN 10346-DX51D+Z140-200
  • A2 construction: Casing and travel stop (angle section) made of stainless steel, material no. 1.4301
  • Blades made of aluminium, material no. AlMg3
  • Blade holders made of stainless steel, material no. 1.4301
  • Blade shafts made of stainless steel, material no. 1.4104
  • Plate of the retaining element made of steel, material no. 1.0718
  • PPS bearings
  • Neoprene seals
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour


Standards and guidelines

  • Casing air leakage to EN 1751, class C
  • Closed blade air leakage (against the intended airflow direction) to EN 1751, class 4


Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Contamination should be removed as it may lead to corrosion and to increased closed blade air leakage

Description

Construction

  • Galvanised sheet steel, duct connection without flange holes
  • A2: Stainless steel
  • G: Duct connection with flange holes


Construction features

  • Rectangular casing, material thickness 2 mm
  • Blades, material thickness 3 mm
  • Flanges on both sides, suitable for duct connection, with or without flange holes
  • Adjustable retaining element to adapt to various pressures (factory set as ordered)
  • Blades can be moved independent of complementary to one another
  • Blades with perimeter seal, pressed against travel stop (angle section) when closed
  • Blade shafts with maintenance-free plastic bearings


Materials and surfaces

  • Casing and travel stop (angle section) made of galvanised sheet steel, material no. EN 10346-DX51D+Z140-200
  • A2 construction: Casing and travel stop (angle section) made of stainless steel, material no. 1.4301
  • Blades made of aluminium, material no. AlMg3
  • Blade holders made of stainless steel, material no. 1.4301
  • Blade shafts made of stainless steel, material no. 1.4104
  • Plate of the retaining element made of steel, material no. 1.0718
  • PPS bearings
  • Neoprene seals
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour


Construction features

  • Rectangular casing, material thickness 2 mm
  • Blades, material thickness 3 mm
  • Flanges on both sides, suitable for duct connection, with or without flange holes
  • Adjustable retaining element to adapt to different pressures (factory set as ordered)
  • Blades can be moved independent of complementary to one another
  • Blades with perimeter seal, pressed against travel stop (angle section) when closed
  • Blade shafts with maintenance-free metal-polymer bearings

Materials and surfaces

  • Casing and travel stop (angle section) made of galvanised sheet steel, material no. EN 10327-DX51D+Z150-200-NAC
  • A2 construction: Casing and travel stop (angle section) made of stainless steel, material no. 1.4301
  • Blades made of aluminium, material no. AlMg3
  • Blade holders made of stainless steel, material no. 1.4301
  • Blade shafts made of stainless steel, material no. 1.4104
  • Plate of the retaining element made of steel, material no. 1.0718
  • Blade bearings made of metal-polymer composite, with an antifriction lining of PTEE/Pb
  • Neoprene seals
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour


Standards and guidelines

  • Closed blade air leakage (against the intended airflow direction) to EN 1751, class 4
  • Casing air leakage to EN 1751, class C


Nominal sizes

  • B: 200, 400, 600, 800, 1000, 1200 mm (intermediate sizes: 201 – 1199 mm, in increments of 1 mm)
  • H: 345, 675, 1005, 1335, 1665, 1995 mm (intermediate sizes 355 – 505, 685 – 835, 1015 – 1165, 1345 – 1495, 1675 – 1825 mm in increments of 1 mm)
  • Any combination of B × H

Technical information

Function, Technical data, Quick sizing, Specification text, Order code, Related products

  • Function
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
  • RELATED PRODUCTS

Pressure-relief dampers open and close automatically. The blades are kept closed by magnets. If the differential pressure exceeds the set maximum value, the magnetic force is overcome, and the blades open. The airflow by which the excess pressure has been caused can now flow through the damper. The pressure peak is immediately and reliably controlled. The blade opening angle depends on the differential pressure and the volume flow rate. When the differential pressure drops below approx. 30 Pa, the blades close again.


Nominal sizes200 × 345 – 1200 × 1995 mm
Volume flow rate range140 – 4790 l/s or 504 – 17244 m³/h at 50 Pa and 2 m/s
Adjustable differential pressure range50 – 1000 Pa (B > 600 mm: 600 Pa max.)
Airflow velocity2 m/s at 50 Pa
Maximum permissible differential pressure in closing direction5000 Pa
Operating temperature0 to 80 °C


Geometric free area – ARK2 [m2]

H

B

200

400

600

800

1000

1200

3450.0310.0850.1390.1940.2480.302
6750.0630.1740.2840.3940.5040.614
10050.0960.2620.4280.5940.7610.927
13350.1280.350.5720.7951.0171.239
16650.160.4380.7170.9951.2731.552
19950.1920.5270.8611.1951.531.864

Intermediate sizes: Intermediate widths can be interpolated


Horizontal airflow Horizontal airflow

Quick sizing tables provide a good overview of the volume flow rates with 50 Pa differential pressure and an airflow velocity of 2 m/s. Values for intermediate widths can be interpolated. Precise intermediate values can be calculated with our Easy Product Finder design program.


Volume flow rate

H

B

200

400

600

800

1000

1200

l/s

m³/h

l/s

m³/h

l/s

m³/h

l/s

m³/h

l/s

m³/h

l/s

m³/h

3451405042759904151494550198069024848302988
67527097254019448102916108038881350486016205832
10054001440805289812104356161057962010723624108676
1335535192610703852160057602140770426709612320011520
16656652394133047882000720026609576333011988400014400
199580028801600576023908604319011484399014364479017244


Airflow velocity

Δpt [Pa]

v [m/s]

351
502
653
804
905




Specification text

Rectangular pressure relief dampers for the protection of internal spaces from differential pressures higher than set maximum levels.

Ready-to-install component which consists of a casing, blades with low-friction bearings, magnets, and travel stop and sealing parts.

Closed blade air leakage (against the intended airflow direction) to EN 1751, class 4

Casing air leakage to EN 1751, class C.


Special features

  • Robust, maintenance-free construction
  • Maximum differential pressure: 5000 Pa
  • Air leakage with back pressure, in closing direction, to EN 1751, class 4
  • Damper for negative or positive pressure (air extract or discharge)
  • Operating temperature 0 to 80 °C
  • Maintenance-free DU bearings with Teflon coating, bearing shafts made of stainless steel
  • Each blade is locked with a factory set permanent magnet
  • Adjustable differential pressure for blade opening: 50 – 1000 Pa, depending on width


Materials and surfaces

  • Casing and travel stop (angle section) made of galvanised sheet steel, material no. EN 10346-DX51D+Z140-200
  • A2 construction: Casing and travel stop (angle section) made of stainless steel, material no. 1.4301
  • Blades made of aluminium, material no. AlMg3
  • Blade holders made of stainless steel, material no. 1.4301
  • Blade shafts made of stainless steel, material no. 1.4104
  • Plate of the retaining element made of steel, material no. 1.0718
  • PPS bearings
  • Neoprene seals
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour


Construction

  • Galvanised sheet steel, duct connection without flange holes
  • A2: Stainless steel
  • G: Duct connection with flange holes


Technical data

  • Nominal sizes: 200 × 345 to 1200 × 1995 mm
  • Volume flow rate range: 140 – 4790 l/s or 504 – 17244 m³/h at 50 Pa, 2 m/s
  • Adjustable differential pressure range: 50 – 1000 Pa (B > 600 mm: 600 Pa max.)
  • Airflow velocity: 2 m/s at 50 Pa
  • Maximum differential pressure: 5000 Pa
  • Operating temperature: 0 to 80 °C


Sizing data

  • Δpsup [Pa]
  • q (m³/h)
  • Δpst [Pa]


ARK2A2G / 600 × 1005 / ER / … Pa / P1-RAL
|||||||
1234567

1 TypeARK2 Pressure relief damper 2 MaterialNo entry: galvanised steel with aluminium bladesA2 Stainless steel with aluminium blades 3 Construction No entry: duct connection without flange holesG Duct connection with flange holes 4 Nominal size [mm] B × H 5 Installation subframeNo entry: NoneER With (only for construction G) 6 Maximum differential pressure [Pa] Specify value in [Pa] 7 Surface No entry: standard constructionP1 Powder-coated, specify RAL CLASSIC colourPS Powder-coated, specify DB colour Gloss levelRAL 9010 GU50RAL 9006 GU30All other RAL colours GU70

Order example: ARK2–G/800×1995/100 Pa
MaterialGalvanised steel, with aluminium blades
ConstructionFlange holes on both sides
Nominal size800 × 1995 mm
Installation subframeWithout
Maximum differential pressure100 Pa
SurfaceStandard construction

Dimensions, Product details

  • DIMENSIONS
  • PRODUCT DETAILS
  • B: 200 – 1200 mm, intermediate sizes 201 – 1199 in increments of 1 mm 
  • H: 345 – 1995 mm, intermediate sizes 355 – 505, 685 – 835, 1015 – 1165, 1345 – 1495, 1675 – 1825 mm in increments of 1 mm 
  • The weight for the next larger size applies 

Flow cross section to calculate the airflow velocity 
  • A = B × H 
  • Unit of measure for B and H: m 

ARK2: Standard sizes

H

No. of blades

3451
6752
10053
13354
16655
19956


ARK2: Intermediate sizes

H

No. of blades

Y

355 – 50515 – 80
685 – 83525 – 80
1015 – 116535 – 80
1345 – 149545 – 80
1675 – 182555 – 80



ARK2, weights, kg


H

B

200

400

600

800

1000

1200

34591113161922
675131720242833
1005192428333843
1335243035414753
1665303743505764
1995354350586674

ARK2, width, no. of flange holes
BNo. of holes n
200 – 2871
288 – 5372
538 – 7873
788 – 10374
1038 – 12005

ARK2, height, no. of flange holes
HNo. of holes n
345 – 4612
462 – 7113
712 – 9614
962 – 12115
1212 – 14616
1462 – 17117
1712 – 19618
1962 – 19959


Installation and commissioning
  • Installation orientation: Horizontal airflow
  • Only for installation in internal spaces
  • Type ARK2 pressure relief dampers are not suitable for air conditioning systems (to protect ducts, for example) because vibration, turbulence and deviations would adversely affect the opening pressure set for the damper.
  • To avoid malfunctions, any disturbing effects should be kept to a minimum, and there should be a sufficient difference between the accepted maximum differential pressure and the 'normal' system pressure.
Note
Deviations:
  • The actual system conditions cannot be considered at the time of the factory setting which is why pressure deviations might occur on site.
  • Temperature fluctuations (within the accepted temperature range) have influences on the holding torque of the retaining element, which can lead to deviations from the set opening pressure


Downloads

product information

certificates

operation manuals

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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +60 6 678 8188 | Fax: +60 6 678 8288 (388)