... for a long period, the ram must be locked manually. Hydraulic ram BOP can be used independently, ... can be used with other BOP.ApplicationThe hydraulic ram BOP is equipped with various types of pipe ... ISO4~8weeksBy wooden caseT/T, L/CJefa Machinery Co,.Ltd,which engaged in API 6A&16A products : 1) ... valve, chock valve, check valve) 3) Bop(Annular/Ram BOP) We are a API/ISO certified enterprise→Head ...