Working media can be water, no-aggressive liquids, steam, oi or oil products, air, gas. dimention:DN15-DN800 pressure:PN10-40 standard:DIN,ANSI,JIS,BS ect. High quality and No.1 after-sale service get our valves good markets nearly every parts of the world Acquirement of TUV CE0036&ISO9002 and SGS ISO9001 certificates makes Huihua set up a full set of Quality Managing System.