HM62U series of mechanical seals to suit the needs of the market by type derived from 60U. Because of the stiffness of spring than the total number of small spring stiffness to the small, due to the installation length (L1) of the error caused by the spring pressure on smaller changes will be welcomed by the market. Therefore, a single spring only a small number of alternative spring. But its compact structure to the merits of reservations. According to the shaft from the drive shaft sets of different ways, with 62U-screw drive, 62UA-screw drive and 62UB-screw drive three, its use generally consistent with the 60U.