Products
Contact us
Phone: +86-534-5012407
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
Our company’s smoke‑exhaust fire dampers are primarily installed in supply and exhaust ductwork or smoke‑exhaust ducts of ventilation and air-conditioning systems. Under normal conditions, they remain open; in the event of a fire, they automatically close when the temperature of the flue gases in the duct reaches a preset threshold. They meet specified requirements for fire resistance and integrity over a defined period, thereby preventing the spread of smoke and flame. These dampers are indispensable safety devices in building fire‑protection systems.
Positive-pressure air supply outlet
Our company manufactures positive-pressure supply air outlets—also known as multi‑blade pressurization supply air 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 of 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 the safe evacuation of occupants.
Our company manufactures panel-type smoke vents—also known as remotely controlled smoke vents or smoke dampers—which are specialized devices installed in suspended ceilings or wall surfaces within building fire‑protection smoke‑exhaust systems. Normally closed, these vents are opened upon activation by the fire‑alarm linkage system during a fire to exhaust indoor smoke, thereby facilitating safe evacuation and supporting firefighting and rescue operations. They are widely used in shopping malls, office buildings, underground parking garages, industrial plants, and other facilities.
Our company manufactures manual airflow control valves—also known as manual dampers or airflow regulators—which serve as critical components in ventilation and air-conditioning systems for regulating duct airflow and balancing flow among branch lines. By manually adjusting the vane angle to alter the effective cross-sectional area of the duct, these valves enable airflow regulation, duct on/off control, and system balancing, and are widely used in building fresh-air and exhaust systems, air-conditioning networks, and industrial ventilation ductwork.
Electric Square Airflow Control Valve
Our company manufactures electric airflow control valves—also known as electric dampers or electric regulating valves—which serve as core components in ventilation and air-conditioning systems for automated duct‑airflow regulation. Powered by an electric actuator that rotates the damper blades, these valves enable automatic airflow adjustment, duct opening and closing, and system balancing, and are widely used in building fresh‑air and exhaust systems, air-conditioning networks, fire‑protection systems, and industrial ventilation ducts.
Fully Automatic Smoke Exhaust Fire Damper
Our company’s fully automatic smoke‑exhaust fire damper is a core component of building smoke control and exhaust systems, integrating smoke extraction, fire protection, and automatic control in a single unit. Normally closed, it automatically opens during a fire to vent smoke and, when the temperature of the flue gas reaches 280°C, it closes automatically to prevent the spread of flames. This fully automatic fire‑protection valve combines smoke‑exhaust functionality with fire‑separation capabilities and is widely used in smoke‑exhaust ductwork for shopping malls, office buildings, underground parking garages, industrial plants, and other facilities.
Our company manufactures stainless steel round dampers—specialized airflow control valves designed for circular ductwork. These dampers are widely used in ventilation and air-conditioning systems, exhaust-gas treatment, chemical processing, food and pharmaceutical industries, and other applications involving circular ducts, enabling precise airflow regulation, duct opening and closing, and system balancing. With their outstanding corrosion resistance, hygienic properties, and high-temperature tolerance, they are the preferred choice for demanding operating conditions characterized by humidity, corrosivity, or stringent hygiene requirements.
Our company manufactures differential pressure relief valves—also known as pressure‑relief valves or automatic differential pressure regulators—which are specialized devices installed in building smoke control and exhaust systems at locations such as stairwell anterooms, shared anterooms, and fire‑elevator lobbies. When the pressurization system is operating and the pressure within the anteroom exceeds the set threshold, the valve automatically opens to vent excess pressure, maintaining the indoor pressure within a safe range. This prevents excessively high pressures from impeding the proper opening of fire doors and ensures the safe evacuation of occupants.
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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