... 4.Compact body saves space Spherical blowout preventers (API 16A series) Working path ( mm ) 180,230,280,346,426,540Working pressure ... material AA, BB, CC, DD, EE, FFWorking temperature of L, P, R, S, T, UProduct specification level PSL1, PSL2, PSL3Product performance ... tool, can fully closed wellhead. Spherical Blowout Preventers (API 16A series)