This research aims to study the impact of speed on the efficiency of fire pump. To appreciate the fire pump used in this research is a centrifugal Gannon has a suction two-way216 mm is closed impeller and the fin blade 6 leaves. By this test will adjust the speed round, 1497 1 645,, and, 1795 rpm, and in this paper the theory of แอ๊ฟ phoenix county, explain the test results. When the diameter of the rotor speed constant but changes, it was found that the flow rate and head, higher round speed increase.Found that each round speed used in testing the effective rate 51% but. The most effective at each round speed used in the test are flow rate is different.
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