Product Details
Product Introduction:
Our company manufactures positive-pressure supply air outlets—also known as multi-blade pressurization outlets or fire‑compartment supply air outlets—which are specialized devices installed in building smoke control and exhaust systems, typically in stairwell anterooms, shared anterooms, and fire‑elevator lobbies. Normally closed, these outlets are opened upon activation by the fire‑alarm linkage system during a fire to deliver fresh air into the stairwell or anteroom, creating positive pressure that prevents smoke from entering evacuation routes and ensures safe egress for occupants.
General technical parameters (taking a mainstream fire‑proof positive‑pressure air supply outlet as an example):
| Parameter Item |
Specification Details |
| Product Name |
Positive-pressure supply air outlet (also known as a multi-blade pressurization supply air outlet or an antechamber supply air outlet) |
| Nominal size |
Common specifications: 300×300 mm, 400×400 mm, 500×500 mm, 600×600 mm (custom non-standard sizes available) |
| Control method |
Electric control ( DC 24 V fire‑fighting linkage), manual control (local activation/reset) |
| Action power supply |
DC 24 V (standard power supply for fire protection systems) |
| Operating current |
≤0.5A |
| Protection Class of the Actuator |
IP54 |
| Valve body material |
Galvanized steel with powder coating (standard), featuring an electrostatically applied surface finish for rust resistance and corrosion protection. |
| Airflow configuration |
Multi-blade adjustable louvered air diffuser, with adjustable blade angles. |
| Activation method |
Electric during a fire / Manually activated; normally closed |
| Applicable Scenarios |
Pressurization ventilation systems for stairwell anterooms, shared anterooms, and fire elevator anterooms. |
| Installation method |
Embedded in the wall / Ceiling-mounted installation, flanged ductwork connection |
| Work environment |
-10℃ to +60℃, relative humidity ≤95% (no condensation) |
Applicable Scenarios and Selection Recommendations:
Core use cases:
1. Pressurized ventilation for the antechambers of stairwells, shared antechambers, and fire elevator antechambers in high-rise buildings.
2. Positive-pressure ventilation system for smoke-proof stairwells in underground structures
3. Fire and smoke control systems in high‑occupancy facilities such as shopping malls, office buildings, and hospitals
Key considerations for selection:
1. Select based on airflow rate and dimensions: Choose diffuser specifications that match the supply airflow rate and duct dimensions specified in the antechamber design, ensuring uniform air distribution and minimal pressure loss.
2. Control Mode Compatibility: When interfacing with the fire‑alarm linkage system, it is mandatory to select a model equipped with electric actuation and feedback signals to ensure seamless integration with the fire control room.
3. Installation requirements: Install on the wall or ceiling of the antechamber, at a height of 0.3 to 1.5 meters above the floor, to facilitate operation and maintenance.
4. Regulatory Compliance: Products must comply with national fire safety standards and possess fire safety certification to ensure successful fire safety inspection and acceptance.
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Mobile phone:+86-188-6602-0062
Email:sddljnhb@163.com
Website:http://www.sddljnhb.com
Address: No. 5166, Tianqu East Road, Economic Development Zone, Dezhou City, Shandong Province
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