GB
2. After 2000 hours of normal operation, electric pump shall be maintained by the following steps:
Disassemble: Check wearing parts, e.g.: rolling bearing, mechanical seal, impeller, and five-way joint,
etc., and timely replace the parts if damaged.
Airtightness test: After teardown repair or replacement of sealing elements, pressure-bearing parts and the
complete machine shall be subjected to hydraulic (air) pressure test at the maximum working pressure,
and o leakage or sweating shall occur within three minutes.
Drain plug
3. When air temperature is below 4° C, anti-freezing measures shall be taken to prevent frost crack of pump
body.
4. If electric pump is not used for a long time, it shall be kept properly_ at a ry an well-ventilated place after
pipelines are removed, water in the pump Is dramed out, and main parts are scrubbed clean.
Bearing
Bearing
Mechanical seal
Drain plug
Impeller
Mechanical seal
Impeller
Five-pass joint
Five-pass joint