Maxell hood type ventilation tube: 1, snorkel design gas flow rate of 5m / s, filtered (mesh, cloth) layer average gas flow rate 0.75m / s. 2, snorkel by overburden thickness (H3) 0.0m, 0.5m, 1.0m three designs, 0.0m for the southern region, 0.5m for the central region, 1.0 for cold regions. 3, after welding rust, corrosion requirements according to customer design requirements. 4, according to the design requirements of different materials, stainless steel hood type ventilation tube. Jinhua Wansheng metal waterproof casing factory is a professional production of rigid, flexible waterproof casing of the enterprise. Has many years of production history, craft equipped, strong technical force, production variety, easy installation and maintenance, superior performance, long life and other effects. Has been the national Ministry of Construction, Ministry of Chemical Industry Water quality inspection center identification and foreign users. The main products are: Floor rigid waterproof casing, stainless steel flexible waterproof casing, S312 flexible waterproof casing, 02S404 type flexible waterproof casing, 02S403 hood type ventilation tube, pipe type snorkel, vent pipes, suction tube speaker, bell, duckbill valve, steel expansion joints, power transmission connectors, expansion joints, clamp flexible pipe joints, sealing wall pipe airtight protective rib tank sealed manhole, protective airtight junction boxes, flexible rubber flexible connector , explosion-proof floor drain, flat welding flange brackets and hangers indoor plumbing, pipe clamp, maintenance manholes, level gauge embedded pipe fittings, 05S804-type reservoir ladders, and can be customized according to different needs of customers as well as all kinds of unshaped Special material pipeline special pieces. Our products are widely used in water supply, drainage, electricity, metallurgy, construction, petroleum, chemical industry, environmental protection, sewage treatment and other major medium-sized areas such as water supply and drainage utilities construction. Selling products over 20 provinces and municipalities, autonomous regions, by users of praise. The factory is located in Zhejiang Province, central west border is the transport hub in Zhejiang, Zhejiang-Jiangxi railway running through things, Jin Wen, gold one thousand railway running north and south; 330 State Road and numerous provincial highway; There Hangjinqu, Jinliwen, Kim Yong Expressway; Yiwu Airport Air line through the nation's major cities. Jinhua beautiful scenery and many historical sites, is China's Jiangnan browse destinations. Traffic telecommunications accessible, you are welcome to visit us. I would like to plant high-quality products, attentive service and all the friends and sincere cooperation, create brilliant!