Electric air volume control is suitable for supply or exhaust air flow range of about 5 Pa pressure range 20-1000 air volume control valve body frame After 2 mm galvanized sheet cold roll forming, dampers 70 ℃, carbon dioxide gas shielded welding or welded ordinary Q235 plate processing; blades 1 mm corrugated galvanized sheet cold rolling, Ma'anshan damper, two synthetic interpolating axis spot welding, or 2 mm G235 steel cold forming, punching monolithic plug square shaft or welding round shaft. Ma'anshan damper, rich ventilation equipment, smoke damper by Dezhou rich ventilation plant. Ma'anshan damper, rich ventilation equipment, smoke damper Plumper Shandong Dezhou ventilation plant (www.frtfsb.com) (www.frtfsb.com) this year introduced a new upgrade, the above picture is for reference only, please call this page or Tel picture on to obtain the latest information, Contact: Zhang.