... /1.4408, CF8/1.4308 2 pieces Cangzhou Shengtong Stainless Steel Products Co. Ltd. is a high-tech enterprise dedicating to ... various kinds of valves and pipe fittings made of stainless steel, carbon steel and malleable iron, and we can also design different ... ,nipple ,plug and so on. They are all up to ANSI, API, DIN, BS, JIS, GB standards an so on. swing check valve