Selecting fire dampers requires comprehensive consideration of multiple key factors to ensure reliability and safety in practical applications. Below are the primary selection criteria:
Certification and Compliance
First, ensure the product holds mandatory national 3C certification, verifiable through the Fire Product Information Network. Additionally, inspect the product's certificate of conformity, packaging integrity, and completeness of accessories.
Select Parameters Based on Application Scenarios
Activation Temperature: Choose based on installation location. For example, exhaust ducts typically require 70°C fire dampers, while smoke exhaust ducts necessitate 280°C fire dampers.
Environmental Adaptability:
High-temperature continuous environments (e.g., kitchen exhaust ducts) require dual-temperature dampers.
Humid environments (e.g., underground garages) necessitate models with rust-proofed valve bodies.
Airflow Control Requirements:
Locations sensitive to airflow fluctuations (e.g., hospital operating rooms) require products with minimal blade closure gaps (e.g., ≤0.5mm) and superior sealing performance.
Core Performance Metrics
Fire Integrity: Premium products should significantly exceed national standards (e.g., maintaining integrity for over 90 minutes under 800°C flames).
Actuation Response Speed: Blade closure time should be ≤3 seconds; faster response times for electric actuators are preferable (e.g., premium products can complete closure within 15 seconds).
Actuator Lifespan: Prioritize actuators with metal gears that have undergone extensive opening/closing testing (e.g., 50,000 cycles).
Materials and Manufacturing
Valve body material should utilize high-temperature resistant materials like Q235B cold-rolled steel plate, with a recommended thickness ≥1.5mm. Employ integral stamping forming to minimize connection points, preventing high-temperature deformation and corrosion issues.
