L)2.75" CHECK VALVE (QTY:2 NO)TO BE SET INSIDE SSDRATED WORKING PRESSURE:7,500 PSITEST PRESSURE:11,250 PSIRATED WORKING TEMPERATURE :300˚ FMATERIAL :4140 H2S SERVICE AS PER API 5CT & NACE MR0175SEAL MATERIAL :AFLASIN ACCORDANCE WITH API 14L LATEST EDITIONINCLUDING REDRESS KITS(10 sets)NOTE: THE DETAILS OF ITEM INCLUDADIN THE REDRESS KITS SHAL BE MENTIONEAL IN THE TECHNICAL PROPOSALS