... Strong, simple construction 4.Compact body saves space Spherical blowout preventers (API 16A series) Working path ( mm ) 180,230,280 ... DD, EE, FFWorking temperature of L, P, R, S, T, UProduct specification level PSL1, PSL2, PSL3Product performance level PR1, ... in oil, natural gas, water, drilling fluidDetailed description *Spherical blowout preventers are compact, annular type BOPS which seal ...