Radial wear detection (1) mechanical detection barometer head fixed to the rear bearing body, the probe into the head with a countersunk head Nut. When the bearing is worn, the rotor sinks, the countersunk head of the shaft nut will grind with the detector head, resulting in inert gas leak and the gauge back to zero. (2) built-in differential induction coil detection stator relative to 180 ° at the same place buried a pair of windings, when the motor to form a rotating magnetic. Shanghai People's Motor Co., Ltd. Shielding pump Pipeline pump Sewage pump YLB Deep well pump Motor fire pump Multistage pump