VARISCO SaxMag V Series, Руководство по эксплуатации

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OPERATING MANUAL - SAXMAG V
Page 24
Trouble Potential causes Trouble shooting
No fluid delivered
1. Pump not filled with fluid.
2. Discharge suction valve closed
3. Incorrect sense of rotation
4. Suction line clogged
5. Filter clogged
6. Leaky suction line
7. NPSH too low (excessive
manometric suction head)
9. Relief valve opens too early or
fails to close
10. Magnetic coupling slips
1. Fill the pump
2. Open the valve
3. Reverse sense of rotation, taking note of the
arrow on the pump.
4. Eliminate clogging
5. Clean the filter
6. Find and eliminate leakage
7. Increase diameter of suction line and/or
piping. Reduce manometric suction head.
Consider vapour pressure of pumped fluid;
alter arrangement, if appropriate.
9. Set opening pressure. Check valve mechanism
10.Stop motor immediately and eliminate cause of
pump obstruction trouble.
Insufficient
delivery rate 1. Back pressure higher than
designed
2. Leaky suction line
3. Speed too low
4. Suction line clogged
5. Filter clogged
6. Viscosity higher than designed
7. Relief valve incorrectly set or
leaking
8. Insufficient suction pressure
9. Worn pump components
(gears, sliding plate)
1. Reduce pressure drop
2. Inspect suction line for leaks
3. Check speed (contact manufacturer).
4. Eliminate line clogging
5. Clean the filter
6. Reduce viscosity or re-design pump.
(contact manufacturer)
7. Re-set relief valve or renew gasket
8. Increase suction pressure
9. Renew components
Pump's suction
capacity diminishes
1. Piping improperly designed
2. Discharge line shut off
3. Suction line shut off
4. Pump worn
5. Suction line leaky 1. Check sizing of piping
2. Open shutoff valve
3. Open suction valve
5. Inspect suction line for leaks
Pump causes noise
1. Cavitation - excessive
manometric suction head
2. Rotor/Teeth deformed
3. Pump/Motor misalignment
4. Vibration noise from relief valve
1. See above "NPSH too low". Check to see if
head is set too high, suction line or valves
and filter are clogged.
2. Check and, if necessary, renew
3. Check alignment
4. Increase spring pressure. Repair or renew
relief valve.
Pump experiences
faster-than-normal
wear
1. Foreign matter in pumped fluid
2. Operating range exceeded
(excessive noise development),
misalignment
1. Install filter; check materials selected.
Contact Varisco SpA.
2. Correct pump alignment.