APH

Description

The APH pressure relief damper is designed to automatically control pressure levels within ventilation ductwork or technical rooms. Developed for demanding industrial HVAC applications, it provides reliable overpressure control in tunnels, Oil & Gas facilities, and industrial process environments.

When the pressure within the system exceeds the preset value, the APH damper automatically opens to stabilize pressure within the duct or room. Conversely, when the pressure falls below the defined threshold, the blades close to limit air backflow and reduce air leakage.

Thanks to its reinforced design, the APH pressure relief damper offers excellent mechanical strength, high-pressure resistance, outstanding durability in harsh environments, and reduced maintenance requirements through its self-operating counterweight mechanism.

Characteristics

• Type: Pressure relief damper
• Function: Automatic pressure control
• Minimum size: W 200 × H 200 mm
• Maximum size: W 1200 × H 1200 mm
• Blade airtightness: Class 1 according to EN 1751
• Casing airtightness: ATC5 according to EN 1751 (formerly Class A)
• Maximum operating pressure: 3,000 Pa
• Recommended air velocity: 0 to 4 m/s
• Airflow direction: Horizontal
• Operating temperature range: -20°C to +80°C (optional: -50°C to +200°C)
• Materials: Galvanized steel or stainless steel

Performances

• Airtightness:
  • APH: Class 1 according to EN 1751
• Pressure rating:
  • The APH pressure relief damper is designed to withstand differential pressures of up to 3,000 Pa with a 700 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 environments

Applications

• Road and railway tunnels
• Oil & Gas facilities
• Petrochemical industry
• Power generation facilities
• Industrial ventilation systems
• Technical rooms
• Offshore installations
• Critical infrastructure
• Industrial HVAC systems
• Pressure safety systems