Design requirements: ⑴ before the end of the suction inlet jet must average speed v is determined according to the bath temperature: air flow velocity on the suction outlet ⑵ v≤ (2 ~ 3) the amount of exhaust v'⑶ suction outlet should be greater than before the jet suction outlet flow ventilation ducts, the end of the jet flow is 1.1 to 1.25 times the height of the air outlet ⑷ generally 0.010 ~ 0.015H, in order to prevent the occurrence of clogging of the air outlet, air outlet height should be greater than 5.0 ~ 7.0mm. Hair Exit flow rate should not exceed 10 ~ 12m / s, in order to avoid level fluctuation. Various filter works and the advantages and disadvantages: gravity settling chamber: by gravity to separate dust particles from a gas stream, building ventilation pipe, the flow rate decreased rapidly after the dust stream entering gravity settling chamber, in laminar or near laminar Under state campaign, in which the hopper dust slowly settling under gravity. Applicable diameter> 50μm. Hangzhou ventilation plumbing | Riverside area ventilation ducts | ventilation pipe processing provided by Hangzhou Hangzhou Xingda ventilation equipment. Hangzhou Xingda ventilation equipment (www.tz1288.com/shop/index_6525.html) strong, credible, in Hangzhou, Zhejiang fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving ventilation Xingda innovative ideas will lead into the brilliant and you work for a better future!