Sethco ZKX 3/4CS, Руководство по эксплуатации

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Sethco
800 Emlen Way, Telford, PA 18969
Tel: 215-799-2577 • Fax: 215-799-0920
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OPERATING INSTRUCTIONS FOR SETHCO ZKX VERTICAL PUMPS
SETHCO
A Met-Pro Fluid Handling Technologies Company
Thermoplastic Pumps
TROUBLESHOOTING
Refer to the following diagnostic section if hydraulic problems are encountered in the pump operation.
NO DISCHARGE
• Pump not primed
• Speed too low
• System head too high
• Suction lift higher than that for which pump is designed
• Impeller or suction completely plugged
• Wrong direction of rotation
• Air leak in the suction line
• Discharge valve closed
INSUFFICIENT DISCHARGE
• Air leaks in suction
• Speed too low
• System head higher than anticipated
• Insufficient NPSHA
• Impeller or suction partially plugged
• Impeller damaged
• Suction opening not submerged enough
• Wrong direction of rotation
INSUFFICIENT PRESSURE
• Speed too low
• System head less than anticipated
• Air or gas in liquid
• Impeller damage
• Impeller diameter too small (wrong pump model selected)
• Wrong direction of rotation
• Discharge not throttled correctly
EXCESS POWER CONSUMPTION
• Speed too high
• System head lower than rating, liquid flowrate too high
• Specific gravity or viscosity of liquid pumped is too high
• Shaft bent
• Rotating elements bound
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