... Certification Packing After inspection the valves are packed in cases and then carefully packed in cartons. About US ZHENGQIU VALVE is a ... valves, pipe fittings, flanged, piping accessories etc. Our products are in accordance with ANSI, JIS, DIN, API, and ISO standard, ... etc. The factory obtained the ISO9001: 2008 quality system certificate in 2000. The products are exported to USA, Korea, Canada, ...