... pressure:38TLifting cylinder on the biggest jacking force:70TStandard of BYJ18-21/35 belt to press operation device, bop system static ... different pressure situation of complete set plants have four different operation modes:1,When wellhead pressure below 4Mpa, can use ... increased spool derived hose and setting up4,When the pressure to achieve 21-35Mpa, can stop operation, close the ram Belt to press ...