泵用机械密封的泄漏点主要有五处：
There are five main leakage points of mechanical seals for pumps:
（l）轴套与轴间的密封；
(l) Sealing between sleeve and shaft;
（2）动环与轴套间的密封；
(2) Sealing between moving ring and sleeve;
（3）动、静环间密封；
(3) Sealing between dynamic and static rings;
（4）对静环与静环座间的密封；
(4) Sealing between the stationary ring and the stationary ring seat;
（5）密封端盖与泵体间的密封。
(5) Sealing between seal end cover and pump body