T R O U B L E S H O O T I N G G U I D E
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| PROBLEM | POSSIBLE CAUSES | REMEDIES |
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| Low flow | Suction lift too high | QSV pumps are not designed |
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| to “lift” or “pull” fluid from a |
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| tank. QSV pumps must be fed |
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| with positive pressure [at |
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| least 20 psi (1.4 bar)]. This |
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| may be accomplished either |
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| by having positive head from |
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| the tank or incorporating a |
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| transfer pump. |
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| Reverse rotation of motor | Make sure the motor is spin- |
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| ning in the proper direction. |
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| Pump not adequately | Prime the pump by filling all |
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| primed | inlet piping, including the |
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| pump, with the process fluid. |
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| Excessive flow | Make sure your pump is oper- |
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| ating within the flow range |
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| specified by the pump per- |
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| formance summary table or |
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| the performance curve |
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| included with the pump. |
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| Clogged suction into filter or | Verify no debris is clogging |
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| screen | the inlet screen or filter. |
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| Air leak in the inlet piping | Fluid motion in your inlet pip- |
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| ing may draw air into the |
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| pump if the piping is not |
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| sealed properly. Air bubbles |
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| will be visible in the discharge |
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| line. |
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| Reverse rotation of motor | Make sure the motor is spin- |
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| ning in the proper direction. |
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| Reverse two of the leads if |
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| necessary. |
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