ATH

Description

The AT-H pressure relief damper is designed to automatically relieve pressure in a room or ductwork system when a preset pressure level is reached. Operating as an aerodynamic safety valve, it protects HVAC systems and technical rooms against accidental overpressure.

The opening pressure is factory-set by adjusting the compression spring tension, ensuring accurate and reliable operation according to project requirements. In the closed position, the damper provides Class 1 airtightness in accordance with EN 1751 for opening pressures above 50 Pa.

Thanks to its robust design featuring a spring-loaded mechanism, EPDM seals, and reinforced linkage, the AT-H pressure relief damper is particularly well suited to commercial HVAC systems, technical rooms, smoke exhaust systems, industrial ventilation ductwork, and applications requiring passive pressure control.

Characteristics

Type

• Pressure relief damper

Function

• Automatic pressure relief

Dimensions

• Minimum size: W200 × H200 mm
• Maximum size: W1000 × H1000 mm

Opening pressure

• 30 to 200 Pa

Operating air velocity

• 1 to 10 m/s

Airflow direction

• Horizontal

Operating temperature range

• -20°C to +80°C (-50°C to +200°C available)

Materials

• • Galvanized steel
  • Stainless steel

Performances

Airtightness

• AT-H: Class 1 in accordance with EN 1751

Pressure

• The AT-H pressure relief damper is designed to withstand operating pressures up to 1000 Pa with an 800 mm blade length in the galvanized steel version

Operating temperature range

• Standard: -20°C to +80°C
• Option: -50°C to +200°C

ATEX

• • Certified for installation in ATEX hazardous areas

Applications

• Technical rooms
• Commercial HVAC systems
• Smoke exhaust systems
• Ventilation ductwork
• Industrial ventilation systems
• Pressure safety systems
• Controlled-pressure rooms
• Technical HVAC installations