Tunnel ventilation dampers
Smoke control and tunnel dampers for ventilation in enclosed or underground tunnel systems (railway, metro, and road transport)
Tunnel dampers
The heavy-duty tunnel damper for ventilation is a safety component. It is specially designed for underground transport systems to meet the requirements. It was laid out by certification and design agencies.
Tunnel dampers are built to handle tough conditions like high humidity and high heat. They work well in dusty air and hard-to-reach places. Tunnel dampers must be very reliable and perform at their best.
Under normal conditions, tunnel ventilation dampers control airflow in a tunnel. During a fire, it ensures proper ventilation. They also control fire, smoke, and hot gases. These dampers remove toxic fumes and smoke from critical areas. When closed, they also act as a fire barrier.
Tunnel ventilation dampers can serve different purposes. It depends on how the tunnel is used. For metro systems, pressurized air can form in front of a fast-moving train, known as the piston effect.
Tunnel ventilation dampers are used at both ends of the station. Outgoing trains pull air, and incoming trains push air. In emergencies, remote-controlled tunnel dampers keep fire and smoke away from passengers. They ensure a safe evacuation.
We offer rugged, industrial-grade tunnel dampers from Trox, Greenheck, Halton, and Sirocco. Zitron and other brands are also available.
Key Features of Tunnel Ventilation Dampers:
- Robust Construction: Heavy-duty design for durability in harsh conditions
- Temperature Tolerance: Reliable performance from 250°C to 800°C
- Material Choices: Available in galvanized steel, 304, or 316 stainless steel
- Power Supply Flexibility: 24V AC/DC, 110V to 230V single-phase, with optional 3-phase
- Seal Technology: mechanically fastened silicone blade seals and stainless steel jamb seals
- High-Temperature Ratings: Designed for high temperatures up to 800 °C
- Pressure Resistance
- Leakage Control: Class I Leakage with a Minimal Leakage Rate
- Actuator Options: This includes automated actuators with explosion-proof options.
- Certification and Testing: UL-listed and tested by ASTM E2226-15b
Specification of Tunnel Ventilation Dampers:
- Frame and Seals: double-flanged frame, silicone blade seals, stainless steel jamb seal
- Temperature Resistance: 250°C (500°F) to 800°C (1500°F) for 1 to 2 hours
- Material Options: galvanized steel, 304, or 316 stainless steel
- Power Supply: 24V AC/DC, 110V to 230V single-phase, 3-phase options available
- Construction: galvanized steel, powder-coated stainless steel
- Bearing choices include stainless steel sleeve types and 2-bolt bronze bearings. Options also include 2-bolt relubricable ball bearings and 2-bolt carbon graphite bearings.
- Seals: Sprung stainless steel side seals for blade expansion at high temperatures
- Blade Type: Fire-rated fabricated airfoil
- SIL Rating: Low Demand SIL 4
- Temperature Testing: 400 °C operation for 2 hours
- Pressure Resistance: Up to 10,000 Pa
- Leakage Class: Class I Leakage, 0.1m³/m²/s at 4,000 Pa
- Blade Action: Parallel or opposed action blades
- Certification: UL-listed, tested to ASTM E2226-15b
- Actuator options include pneumatic, electrical, spring return, modulating, and power on/off. Explosion-proof options are available for Zones 1, 2, and 22.
- Additional Option: Electric actuators in thermally insulated protective enclosures
Variance:
- Exhaust Dampers for Road Tunnels
- Shut-off Dampers
- Profile shut-off dampers
- Pressure relief dampers
- Fresh air injection damper
Suggested Applications of Tunnel Ventilation Dampers:
- Railway Tunnels
- Roads, mountain tunnels, and underground passes
- Metro Tunnels
- Tube metro, tunnels
Standards and Certifications:
- Tunnel Ventilation Control/Smoke: NFPA-130, NFPA-502 Certified
- UL 555S Certified
- BS476 standards
- AMCA: Air Performance Certified.
- UL Listed
- CSA Certified
- FM Approved
- TUV Certified
