GB / T12234-2007 universal valve flange and butt weld steel gate valves GB / T12235-2007 General valves Flanged steel globe valves and lift check valves GB / T12236-2008 General valves - Steel swing check Valve GB / T12237-2007 universal valve flange and welded steel ball valves GB / T12238-2008 common valve flange and wafer butterfly GB / T12239-2008 General valve diaphragm GB / T12240-2008 General valve Iron cocks Valve GB / T12241-2005 valve general requirements GB / T12243-2005 Spring loaded safety valves according to body material (1) metal material valves: valve body and other parts made of metallic material. Such as cast iron valves, cast steel valves, valve steel, copper alloy valve, aluminum valve, lead alloy valves, titanium valves, Monel valve. (2) non-metallic materials valves: valve body and other parts are made of non-metallic materials. Such as plastic valves, ceramic valves, ceramic valves, glass steel valves. The following is some stainless steel valve material parameters and specific application (1) Rotary include ball valves, butterfly valves, plug valves, etc. and (2) straight trip includes gate valve, angle seat valve. Taiwan Toyama Valve Co., Ltd. Guangzhou Kaiheng Valve Co., Ltd., the Hong Kong _ valve (Online) _ valve provided by the Dongguan Science and Technology Co., Ltd., the Hong Kong valve. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) is Dongguan, butterfly leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Ming Kong valve leadership with the staff warmly welcome all inquiries negotiations to create a better valve out of Hong Kong in the future.