The Hebei Province Anping County Chang An petroleum chemical industry equipment limited company had been established in 1996, which is located in anping county .It is a modernized enterprise ,established by the filter designing experts and making experts ,which is a whole system with the research, the design, the production and the sale departments . The company has a capable team . There is not only many experts , but also the advanced production equipment and the perfect central laboratory, kinds of experiments and checker, and perfect post-sale service . The products are sold to America, Egypt, England, Holland, Mongolia, Australia, Bangladesh, Pakistan, Thailand, Indonesia, Uganda,Germany, Japan, Greece and so on , and many national provinces and cities .