Usually always open, fuse action temperature 70 ℃. When the temperature of the air inside the duct reaches 70 ℃, fusible film fuse, the valve automatically closes under the force of the torsion spring. When the valve is closed, the output off signal. Manually shut down, manual reset opening. PY-SD PY-BSD exhaust valve exhaust valve remote control Features: DC24V electrical signal can quickly open the valve. Manually open. Output Enable signal, the interlock exhaust fan. Manual reset closed. PY-BSD exhaust valve can be opened manually remote control, remote control manual reset closed. Our main products are fire temperature exhaust fan Francis fan axial fans roof fan wind chassis positive pressure blower pressure multi-leaf blower outlet pressure outlet pressure delivery outlet fire equipment fire damper fire control valve exhaust valve exhaust leafy exhaust port damper plate discharges new air unit combined air conditioner fresh air ventilator aluminum outlet muffler air conditioning cooling towers, water tanks accessories, air conditioning, fire protection products. "National fixed fire extinguishing and fire-resistant components of Quality Supervision, Inspection and Testing Center," qualified. And sold to 30 provinces and autonomous regions as well as in Taiwan and Southeast Asia. I plant has consistently adhered to the "integrity, innovation, refinement, service," business philosophy, and constantly strive to improve quality and technical innovation to meet market needs and customer requirements as their responsibility, and strive to itself as honesty skilled services in place, customer satisfaction brands. The company aims "credibility-based, customer first, technology innovation, quality branding" fire fans procurement, welcomed customers to negotiate business. Category: normally opened fire fans smoke damper test, 280 degrees fusing Close Fire fan service, normally open, output electrical signal, and one that is similar to, but different fusing temperature damper wholesale fire fans, generally used in fire row smoke tube through the firewall, the flue gas temperature exceeds 280 degrees when automatic fuse off, you can turn off the exhaust fan interaction. Exhaust port: If you installed the necessary piping exhaust valve, use an ordinary single Grille can; otherwise required plate discharges, it is also the institution with the smoke damper. Fire fans | Anhui Fire fan | Guangde Fire fan by fan Air Conditioning Equipment Co. Shandong GREAT. Shandong GREAT Fan Air Conditioning Equipment Co. (www.greatfengji.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customers needs. GREAT leadership in the staff warmly welcome all inquiries negotiations to create a better future GREAT.