Negative pressure air duct

Introduction

Application:used in coal mines, tunnels, underground local fan for positive pressure ventilation;
air duct varieties: coated cloth duct by rubber coated cloth material into a positive pressure air duct, plastic and rubber coated cloth duct pressure coated cloth duct pressure.
1－ end of the ring ２－2 - rings installed lines ３－ rings ４－ trans side
projet size tolerance（mm）
air duct dia.（D） 300 400 450 500 600 800 1000 0±6
air duct length（L） 5 10 20 0±100
1, hairdryer size or special shape specifications shaped duct, elbows, tees, etc., can be manufactured according to the buyer's requirements.
2, hairdryer rings, rings and other metal parts for end specifications are subject to special requirements agreed upon by both parties.
3、3, hairdryer opposite side ends plus its length L, is 150-200mm.
Duct ventilation duct performance test report
Diameter,，mm one hundred meters windage（N·S 2 /M 8 ）
300 ≤811.0
400 ≤196.0
450 ≤122.0
500 ≤54.0
600 ≤24.0
800 ≤6.0
1000 ≤2.0

Shandong China Coal Industrial&Mining Supplies Group Co.,Ltd (hereinafter referred to as china coal) is a group company, which is a collection of e-commerce, machinery manufacturing, software, research and development, modern logistics of large diversified industrial group. The group has 100 million yuan registered capital , with more than 1100 employees.

China coal is a professional manufacturing base of mines support equipment, transport equipment, lifting equipment, spray equipment, drilling equipment, ventilation equipment, lifting equipment and other products, as well as research and development new product and mine construction products with advanced high technology.

In order to development of international trade , expansion overseas market, china coal established international trade branch company and import and export branch company. China coal actively expand foreign trade channels based on a good market image, brand, modern information platforms and capital protection. Based on the trading diversification strategy, the group established a chain loop trading system which is with import and export trade of the mining equipment as a core, the resources and market as the elements. China coal also formed a overseas sales team, that covers English, French, German, Portugal, Italy, Russian, Korean, Japanese, Arabic, and more than 10 language professionals to explore broader international markets on the Internet. At present, the group signed up for "china coal" trademark in the European Union, United States, Russia, United Kingdom, Taiwan, Macao, Singapore, Indonesia, Israel, and other countries, also get the right to use the trademark of the United Kingdom and Taiwan. Hundreds kinds of products such as tunnel boring machine, coal cutter machine etc. is exported more than 140 countries and regions which are the United States, Australia, Germany, Russia, Spain, France, Canada, United Kingdom, Italy, Portugal, Georgia, Austria, and Colombia. China coal is to establish long-term, broader economic and trade cooperation and strategic partnership with a number of large state-owned enterprises and customers, and won the unanimous approval of them.

China coal has succeeded in passing a number of certification systems which are ISO9001, 2008 quality management system certification, United States ANAB management system certification, United Kingdom international authoritative certification bodies UKAS quality management system certification, SGS certification (made in China), Alibaba GIS certification. She has also obtained a variety of honor which are China excellent enterprise of mechanical industry, China equipment manufacturing operation top 10 enterprises, national reputation for quality assured supplier, China credit certification system demonstration unit, national quality trustworthy product for conformity assessment, national consumer satisfaction units, China AAA level quality trustworthy enterprise and Chinese e-commerce company credit rating AAA level credit Enterprise.