... 4.Compact body saves space Spherical blowout preventers (API 16A series) Working path ( mm ) 180,230,280,346,426, ... 3M,5M,10Mmain material AA, BB, CC, DD, EE, FFWorking temperature of L, P, R, S, T, UProduct specification level PSL1, ... also special lightweight models for airlifting and Arctic models for low temperature service.SPECIAL FEATURES — SANYI SPHERICAL BOPSRugged, reliable sealing element ...