The non-return ventilation damper is a damper that prevents backflow of the air stream within a ventilation flow.

TECHNICAL SPECIFICATIONS
Dimensions: ø 125 up to 315 mm

The leak-tight non-return ventilation damper (DIN 25_496) closes as soon as the pressure in your ventilation network becomes zero or negative and automatically locks off the ducts, protecting the air handling units from back-pressure phenomena.

Extensive practical experience and numerous laboratory tests have been carried out to optimise the efficiency of non-return dampers. The results show that the leak-tight non-return ventilation damper (DIN 25_496) has a very low pressure drop and, above all, low leakage rates.

TECHNICAL SPECIFICATIONS
Dimensions: from 200 x 200 mm to 1,400 x 2,000 mm
Overall damper depth: 360 mm
Max. temperature: 90°C
Maximum leakage to DIN 25 496: <10 L/(h-m²) at 1 bar, 20°C and p = 2,000 Pa

TECHNICAL DATA
The damper frame is in stainless or galvanised steel and can accommodate up to seven blades in reinforced, resistant elastic materials.

The pressure relief ventilation damper is a damper that prevents backflow of the air stream within a ventilation flow.

TECHNICAL SPECIFICATIONS
Dimensions: 150 × 150 up to 600 × 350 mm

The leak-tight / seismic pressure relief damper is resistant to seismic events and to the effects of high pressures and high air flow velocities.

TECHNICAL SPECIFICATIONS
Dimensions from 200 × 200 × 210 to 2,000 × 2,000 × 210 mm
Damper body material: galvanised steel, painted carbon steel or stainless steel
Maximum air velocity inside the duct 25 m/s
Maximum pressure differential 7,500 Pa
Seismic resistance defined to RRS (DBE, APC) for the building location – tested for an acceleration above 10 g

TECHNICAL DATA
Leak-tightness in accordance with EN 1751 through the casing class C
Withstands the action of radioactive aerosols – decontamination possible
Minimum service life 40 years (maintenance-free design)

The pressure relief damper / low pressure / medium flow rate is recommended for low opening pressures. For a wide variety of different applications, pressure relief dampers are used to limit and control pressure.

TECHNICAL SPECIFICATIONS
Dimensions: W 348 x H 598 x D 485 mm
Weight: 19 kg
Flow rate from 0 to 5,000 m³/h
Opening pressure from 50 to 150 Pa

The pressure relief damper / low pressure / low flow rate is recommended for low opening pressures with a low volumetric flow range. For a wide variety of different applications, pressure relief dampers are used to limit and control pressure.

TECHNICAL SPECIFICATIONS
Dimensions: W 250 x H 150 x D 250 mm
Weight: 3.5 kg
Air flow volume: 0 – 300 m³/h
Opening pressure: 50 – 120 Pa

The pressure relief damper / high pressure / medium flow rate protects the ductwork against the high loads caused by strong positive or negative pressure. For a wide variety of different applications, pressure relief dampers are used to limit and control pressure.

TECHNICAL SPECIFICATIONS
Dimensions: W 800 x H 500 x D 620 mm
Weight: 36 kg
Air flow volume: 0 – 17,000 m³/h
Opening pressure, adjustable: 1,100 – 2,300 Pa

TECHNICAL DATA
The KL-E type pressure relief damper is a design variant with a control function which, as soon as the opening pressure is exceeded, keeps the pressure in the ductwork almost constant, irrespective of the volumetric flow range.
When the pressure in the ductwork falls back to its normal range after the malfunction has been corrected, the damper closes automatically.

The overpressure / high-pressure / high-flow damper is recommended for high opening pressures.

TECHNICAL SPECIFICATIONS
Dimensions: L 630 x H 400 x D 510 mm
Weight: 23 kg
Air flow volume: Vmin = 5,000 m³/h to Vmax = 450 √Opening pressure [Pa] m³/h
Opening pressure, adjustable: 1100 – 2,400 Pa
Leak-tightness: EN1751 class 4

The circular containment damper (DIN 25496) is designed for installations which, for safety reasons, require certain sections of the ductwork or of the machine to be hermetically isolated.

TECHNICAL SPECIFICATIONS
Diameter range: 80 to 400 mm
Max. temperature: from -40°C up to +100°C
Max. pressure: 10,000 Pa
Maximum internal / external leakage to DIN 25 496: <10 L/(h-m²) at 1 bar, 20°C and p = 2,000 Pa

TECHNICAL DATA
Actuator: electric, pneumatic, manual
Stainless steel (AISI/SAE 304)

The rectangular containment damper (DIN 25496) is designed for installations which, for safety reasons, require certain sections of the ductwork or of the machine to be hermetically isolated.

TECHNICAL SPECIFICATIONS
Dimensions: 400 x 400 to 1200 x 1200 mm
Max. temperature: from -40°C up to +100°C
Max. pressure: 10,000 Pa
Maximum internal / external leakage to DIN 25 496: <10 L/(h-m²) at 1 bar, 20°C and p = 2,000 Pa

TECHNICAL DATA
Actuator: electric, pneumatic, manual
Stainless steel (AISI/SAE 304)

The anti-blast / explosion-relief ventilation damper is recommended to attenuate the effects of overpressure produced by chemical reactions or gas explosions, and thus to protect your ventilation network and the equipment connected to it.

TECHNICAL SPECIFICATIONS
Dimensions: from 200 x 500 mm to 1250 x 2000 mm
Overall damper depth: 360 mm
Max. permissible temperature: 100°C
Maximum overpressure: 0.45 bar

TECHNICAL DATA
The pressure wave withstood by the RK-F10 overpressure damper can build up in approximately 100 ms with a positive pressure of 0.45 bar. The casing, blades and damper rods are made of stainless steel.