The requirements for the leakage of the mechanical seal of the submersible electric pump are much higher than that of the general water pump.
According to the commonly used mechanical seal structure of submersible pumps, the basic types are:
(1) Balanced mechanical seal and unbalanced mechanical seal;
(2) Internal (set) mechanical seal and external (set) mechanical seal;
(3) Single-end mechanical seal and double-end mechanical seal;
(4) Single spring mechanical seal and spring mechanical seal;
(5) Rotary mechanical seal and static mechanical seal;
(6) Internal flow mechanical seal and external flow mechanical seal
