BYDF flameproof mobile multi-fan technology parameters: 315mm Model BYDF32 explosion-proof in the form of fan diameter air volume 76 m3 / min pressure 390Pa Power 750W Poles 2P S1 fixed duct length 5-10m Ordering Information: Please specify the desired The full name of the specific product model, proof mark and number; so when the product leaves the factory with a full range of technical information and installation instructions, the user must be in strict accordance with the instructions to install and use.