Product overview EJ's swing check valve are manufactured in accordance with API6D or API 594 specification and tested to API 6D. Size: NPS 2"~48"(DN50~DN1200) Pressure Rating: ASME CLASS 150~2500LB(PN16~PN420) Body material:Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel End connection:RF, RTJ,BW EJ Industry Group Co.,Ltd is a leading professional valves manufacturer in China. EJ Group's industry valves range cast steel and forging steel floating ball valve, trunnion mounted ball valve, DBB ball valve, gate valve, globe valve, check valve and high performance butterfly valves. The fields we serve include oil and gas, LNG, refinery, chemical, pharmacy, mining industry, etc. All EJ Group's products are manufactured and tested according to international standards API 6D, API6A, API600, ANSI B16.34, API607, API6Fa, API 591, API594,API609, API602, BS5153, BS1868, BS1873, DIN3202, DI…