Our company is a professional manufacturer of fire protection products, the main products are fire dampers, exhaust valves, exhaust damper, high-temperature exhaust fan and other products. Exhaust valves are suitable: exhaust valve is usually installed in the exhaust system duct dampers price, usually normally closed, smoke detector send out alarm signals in case of fire, the control center to turn on electrical solenoid valve so that the valve quickly open, but also pleasant to manually open the valve quickly exhaust. Performance: · Telecommunications No. DC24V ± 2.4V open the valve. ? Manual allows the valve to open, manual reset. · After the operation of the valve opening signal output. · According to user requirements can be interlocked with other equipment. Usually always open, fuse action temperature 70 ℃. When the temperature of the air inside the duct reaches 70 ℃, fusible film fuse damper wholesale, 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 fire dampers, 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 duty manual damper, trying to itself as honesty skilled services in place , customer satisfaction brand enterprises. The company aims "credibility-based, customer first, technology innovation, quality branding", welcomed customers to negotiate business. 70 ℃ damper, Chizhou damper, high-quality dampers provided by Shandong Air Conditioning Equipment Co. GREAT fan. Shandong GREAT Fan Air Conditioning Equipment Co. (www.greatfengji.com) strong, credible, Shandong Texas fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead into the brilliant GREAT and you work for a better future!