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| | | I CAL WATER FLOW PATTERN HALE'S TWO STAGE IENTRIFUGAL FIRE PUMP | | |
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| | | VOLUME OPERATION (PUMP IN PARALLEL) | | |
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| | | DISCHARGE MANIFOLD | | |
| | | TRANSFER VALVE | | |
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| | | CHECK VALVE (OPEN) SUCTION | | |
| | | CHECK VALVE SUCTION <OPEN) | | |
| | | IMPELLERS | | |
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| | | PRESSURE OPERATION (PUMP IN SERIES) | | |
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| | | TRANSFER VALVE DISCHARGE MANIFOLD | | |
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| | | CHECK VALVE SECOND STAGE (CLOSED) SUCTION IMPELLER | | |
| | | CHECK VALVE SUCTION (CLOSED) FIRST STAGE IMPELLER | | |
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| | | .SURE OPERATION | | |
| | | VOLUME OPERATION Water flow is split at point A to direct approximately 'A total (low to each impeller Check valvos are open. Centrifugal force of impellers increases pressure which is directed to discharge manifold. This position permits maximum flow of pump. | | HALE | | PRI | | |
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| | | Water flow is directed to suction side (eye) of first stage impeller B. Flow from first stage impeller (at increased pressure) is directed thru transfer valve C to suction side (eye) of second stage impeller D. Flow Irom second stage impeller is directed to discharge manifold. This position permits maximum pressure of pump. | | |
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| | | tl>t* CORPORA TiON | | |
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| | | im«» r«™. «Mi«; | | |
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