The John CRANE 58b multi-spring mechanical seal, balanced, with an O-ring is used at temperatures from -40 to + 200°C, with a pressure of up to 5.2 MPA and a rotation speed of 25 m/sec.
Analogs: LIDERING LMS20B, Burgmann BT-C5.KB, AESSEAL M04SU, AESSEAL M04S, Vulcan 1659BS, Hermetica 351, BTS Engineering R-58B.