Spreadsheet: 822998d1679640131-need-to-search-multiple-cell-value-and-fill-it-all-into-another-cell-guide-for-suffering
Sheet: Centrifugal Pump Guide

 | Possible Problem
 | No flow | Under capacity | Irregular discharge | Low discharge pressure | Pump will not prime | Prime lost after starting | Pump stalls when starting | Pump overheats | Motor overheats | Excessive power absorbed | Noise and vibration | Pump element wear | Seizure | Mechanical seal leakage
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Possible Causes | No
 | X |  |  |  |  |  |  |  |  |  |  |  |  |  | Incorrect direction of rotation | 1
 | X |  |  |  |  |  |  |  |  |  |  |  |  |  | Pump not primed | 2
 | X | X | X | X |  | X |  |  |  |  | X |  |  |  | Insufficient NPSH available | 3
 |  | X | X | X |  | X |  |  |  |  | X |  |  |  | Fluid vaporising in suction line | 4
 | X | X | X |  | X | X |  |  |  |  | X |  |  |  | Air entering suction line | 5
 |  | X | X |  | X | X |  |  |  |  | X |  |  |  | Strainer or filter blocked | 6
 |  | X |  |  |  | X | X | X | X | X |  |  |  | X | Fluid viscosity above rated figure | 7
 |  | X |  |  |  |  |  |  |  |  |  |  |  |  | Fluid viscosity below rated figure | 8
 |  |  |  |  |  |  |  | X |  |  | X | X | X | X | Fluid temperature above rated figure | 9
 |  |  |  |  |  |  | X |  | X | X |  |  |  |  | Fluid temperature below rated figure | 10
 |  |  |  |  |  |  |  |  |  |  | X | X | X | X | Unexpected solids in fluid | 11
 | X | X | X |  |  | X | X | X | X | X | X | X | X | X | Discharge pressure above rated figure | 12
 |  |  |  |  |  |  |  |  |  |  |  |  |  | X | Seal flushing inadequate | 13
 |  | X |  |  |  |  |  | X | X | X | X | X | X |  | Pump casing strained by pipework | 14
 | X | X |  |  |  |  |  | X | X | X | X | X | X |  | Metal to metal contact of pumping element | 15
 |  | X |  | X |  |  |  |  |  |  |  |  |  |  | Worn pumping element | 16
 | X |  |  |  | X |  |  |  |  |  |  |  |  |  | Suction lift too high | 17
 |  |  |  |  |  |  |  |  |  |  |  |  |  | X | Fluid pumped not compatible with materials used | 18
 |  |  |  |  |  |  |  |  |  |  |  |  |  | X | Pump allowed to run dry | 19
 |  |  |  |  |  |  |  |  |  |  | X |  |  |  | Faulty motor | 20
 |  | X |  |  |  |  |  |  |  |  |  |  |  |  | Too large clearance between impeller and back plate/casing | 21
 |  | X |  |  |  |  |  |  |  |  |  |  |  |  | Too small impeller diameter | 22
 | X |  |  |  |  |  |  |  |  |  |  |  |  |  | Pumping element missing i.e. after service | 23
 | No | Solutions
 | 1 | Reverse motor
 | 2 | Expel gas from suction line and pumping chamber and introduce fluid
 | 3 | Increase suction line diameter. Increase suction head. Simplify suction line configuration and reduce length. Decrease fluid temperature - check effect of increased viscosity?
 | 4 | Increase suction line diameter. Increase suction head or pressure on fluid surface, Simplify suction line configuration and reduce length. Decrease fluid temperature - check effect of increased viscosity?
 | 5 | Remake pipework joints
 | 6 | Service fittings
 | 7 | Increase fluid temperature. Increase motor speed. Check seal face viscosity limitations.
 | 8 | Decrease fluid temperature
 | 9 | Cool the pump casing. Reduce fluid temperature . Check seal face and elastomer temperature limitations.
 | 10 | Heat the pump casing. Increase fluid temperature.
 | 11 | Clean the system. Fit strainer to suction line. If solids cannot be eliminated, consider fitting double mechanical seals.
 | 12 | Check for obstructions i.e. closed valve. Service system and change to prevent problem recurring. Simplify discharge line to decrease pressure.
 | 13 | Increase flush flow rate. Check that flush fluid flows freely into seal area.
 | 14 | Check alignment of pipes. Fit flexible pipes or expansion fittings. Support pipework.
 | 15 | Check rated and duty pressures. [NAME] to pump maker.
 | 16 | Fit new components
 | 17 | Lower pump or raise liquid level
 | 18 | Use optional materials
 | 19 | Ensure system operation prevents this. Fit single or double flushed mechanical seals.
 | 20 | Check and replace motor bearings
 | 21 | Reduce clearance between impeller and back plate/casing
 | 22 | Fit larger size impeller - check motor size
 | 23 | Fit pumping element