... 4.Compact body saves space Spherical blowout preventers (API 16A series) Working path ( mm ) 180,230,280,346,426,540Working pressure ... , CC, DD, EE, FFWorking temperature of L, P, R, S, T, UProduct specification level PSL1, PSL2, PSL3Product performance level PR1, PR2Working ... tool, can fully closed wellhead. Spherical Blowout Preventers (API 16A series)