Round Fire Damper with Regulation

Jiangsu Deli Air Conditioning & Purification Equipment Co., Ltd.
Fire Damper with Volume Control (Normally Open Type)

Operational Characteristics:

1. Default Status:

   • Normally open (NO) with 4-position adjustable blades (0°/30°/60°/90°)

   • Manual quadrant lever for airflow regulation

2. Triple-Actuation Shutdown:

   • DC24V electric actuator (fail-safe spring return)

   • 70°C thermal fuse (BS EN 1366-1 certified)

   • Manual emergency override

3. Signal Feedback:

   • Isolated dry contact (SPDT 5A/250VAC) signals valve closure

   • Compatible with BAS/BMS systems

Technical Specifications:

• Valve Construction:

  • Frame: 1.5mm hot-dip galvanized steel (SGCC Z275)

  • Blades: 1.2mm stainless steel with graphite seals

  • Shaft: 10mm SS304 with bronze bearings

• Electrical Parameters:

  • Actuator: 24VDC, 15W, 15s operation time

  • Wiring: Fire-rated (EI 90 standard)

• Performance:

  • Air leakage: ≤50 m³/h/m² @ 300Pa (EN 1751 Class 2)

  • Temperature rating: -20°C to +120°C continuous

Certifications:

• CCCF (China Fire Product Certification)

• EN 13501-3 Fire Resistance Class EI 60

• UL 555 Leakage Class II

Installation Requirements:

1. Mounting:

   • Horizontal/vertical duct installation

   • Minimum 1.5D straight duct upstream (D=duct diameter)

2. Electrical:

   • Conduit entry: 20mm PG thread

   • Emergency power backup recommended

Ordering Example:
Model: DL-FD-600V4
Size: 600×600mm
Options:

• With mechanical position indicator

• With auxiliary limit switch

Maintenance Note:
“Lubricate blade bearings annually with high-temp grease (NLGI 2)”
“Test manual operation quarterly per NFPA 80”