Rectangular Fire Damper

Rectangular Fire Damper is the most widely used general-purpose fire damper in building ventilation and fire protection engineering. It adopts a standard rectangular cross-section design, can be directly connected to various rectangular ventilation ducts, and is widely installed at key nodes where air ducts pass through fire compartments, walls, and floor slabs. It remains normally open to ensure smooth system ventilation in daily operation. When the flue gas temperature in the pipeline reaches 70℃, the built-in fusible temperature sensor of Rectangular Fire Damper automatically triggers, and the spring-driven mechanism drives the damper blades to close rapidly, maintaining stable sealing performance within the specified fire resistance time, effectively blocking the spread of fire and high-temperature flue gas along the air duct, and providing basic and reliable pipeline protection for building fire safety.

Our Rectangular Fire Damper adopts a standardized modular design. The valve body is formed by integral bending of high-quality galvanized steel sheet, and the four corners are locked with 90° seamless corner inserts, with high structural strength and not easy to deform after long-term use. The multi-blade opposed damper blades cooperate with the precision linkage transmission mechanism, with tight closing and leakage stably meeting national fire protection product standards. The product is standard-equipped with a manual operating mechanism, supports manual opening and closing and opening adjustment, and can be equipped with an electric actuator and signal feedback device according to project requirements. As a source factory with 23 years of production experience, our Rectangular Fire Damper covers a full range of common sizes, with mature and stable mass production technology and outstanding cost performance. It can quickly respond to bulk procurement needs of various construction projects.

• Civil buildings: Fire compartmentation of ventilation and air conditioning systems in various high-rise residences, office buildings, hotels, and shopping malls
• Public facilities: Ventilation pipeline fire protection in public buildings such as hospitals, schools, and stadiums
• Industrial scenarios: Ventilation system fire partition in ordinary workshops and storage buildings

We have a 13,000-square-meter self-built production workshop, equipped with a full set of automated production equipment such as CNC shearing and bending machines, large-scale flat laser cutting machines, and laser welding machines. As a conventional main product, Rectangular Fire Damper has a monthly production capacity of 2,000 units. We keep stock of common engineering sizes, and can quickly deliver spot orders. Founded in 2003, the factory has been deeply engaged in the field of ventilation, smoke control and exhaust for 23 years. We have a professional R&D and production team, with fast product iteration speed and high standardized production level, and can efficiently undertake bulk orders of various large-scale engineering projects.

We have established a full-process standardized quality control system, and set up multiple quality control nodes for the mass production of Rectangular Fire Damper: raw material incoming inspection of material and thickness, sampling inspection of dimensional accuracy and splicing tightness during production, and 100% full inspection of operation sensitivity and leakage performance at the finished product stage. Each product undergoes complete performance testing before leaving the factory to ensure good dimensional interchangeability and stable and reliable performance. We support on-site inspection by third-party institutions, and all factory products can be traced back to production batches and inspection records, with guaranteed quality.

We support flexible business payment plans. Standard products adopt the settlement method of 30% advance payment and 70% balance payment. Bulk procurement can enjoy tiered price discounts, and the larger the procurement volume, the greater the discount. We support settlement in multiple mainstream currencies such as US dollars, euros, and British pounds, and can negotiate payment nodes and payment terms according to customer needs. Long-term cooperative customers and repeat orders can enjoy priority production scheduling and additional price discounts, ensuring customers' procurement cost and delivery efficiency.

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