Type ARK

For heavy duty applications

 

Non-return dampers prevent unwanted airflows against the intended airflow direction when the system is not in operation

  • Air leakage with back pressure to EN 1751, class 4
  • Maximum pressure loading of 5000 Pa
  • Blades made of salt-water resistant AlMg3, casing made of galvanised steel
  • Available in standard sizes and many intermediate sizes
  • Variant ARK (with linked blades) for variable volume flows
  • Variant ARK-1 (with adjustable blade restrictors) for constant volume flows
  • Installation in horizontal or vertical ducts


Optional equipment and accessories

  • Installation subframe
  • Powder coating (RAL, NCS or DB)
  • Stainless steel construction with stainless steel casing; blades made of AlMg3
  • Temperature resistant up to 200 °C with Viton seal
small_tab1_Serie ARK
  • Application
  • Description

Application

  • Non-return dampers of Type ARK for the fresh air and exhaust air ducts of air conditioning systems
  • Prevention of unwanted airflows against the intended airflow direction when the system is not in operation
  • Blades close automatically when the system is shut down
  • Maximum differential pressure of 5000 Pa

Special characteristics

  • Blades made of salt-water resistant AlMg3
  • Robust, maintenance-free construction
  • Maximum pressure loading of 5000 Pa
  • Closed blade air leakage with back pressure, in closing direction, to EN 1751, class 4
  • Damper for negative or positive pressure (air extract or discharge)
  • Temperature resistant up to 80 °C
  • Optional temperature resistant construction for up to 200 °C, with Viton seal
  • Installation in horizontal or vertical ducts
  • Maintenance-free DU bearings with Teflon coating, bearing shafts made of stainless steel

Variants

  • ARK: Non-return damper with linked blades, preferably for variable volume flows
  • ARK-1: Non-return damper with adjustable blade restrictors, preferably for constant volume flows

Construction

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

Accessories

  • Installation subframe: Installation subframe for the fast and simple installation of mechanically self-powered dampers

Technical information

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

Functional description

Non-return dampers open and close automatically.

When the system is in operation, the blades open when air flows. The blade opening angle depends on the differential pressure and the volume flow rate; for variant ARK-1 the opening angle is limited by adjustable blade restrictors.

When the system is shut down, the blades close due to their weight. They safely prevent air from flowing against the intended airflow direction.

ark
ark

 

Rectangular non-return dampers to prevent air from flowing against the intended airflow direction through fresh air and exhaust air ducts of air conditioning systems.

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

Special characteristics

  • Blades made of salt-water resistant AlMg3
  • Robust, maintenance-free construction
  • Maximum pressure loading of 5000 Pa
  • Closed blade air leakage with back pressure, in closing direction, to EN 1751, class 4
  • Damper for negative or positive pressure (air extract or discharge)
  • Temperature resistant up to 80 °C
  • Optional temperature resistant construction for up to 200 °C, with Viton seal
  • Installation in horizontal or vertical ducts
  • Maintenance-free DU bearings with Teflon coating, bearing shafts made of stainless steel

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: 690 – 23950 l/s or 2484 – 86220 m³/h at 10 m/s
  • Differential pressure (horizontal airflow): 115 Pa at 10 m/s
  • Differential pressure (vertical airflow): 45 Pa at 10 m/s
ark

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Contact

Thank you for your message!

Visual contact Visual contact

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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.: +43 1 250 43-0| Fax: +43 1 250 43 34