This research aims to study the impact of round speed affecting performance to analyze the efficiency of centrifugal fire pump type The fire pump was used for research.In the speed round, 1 test497 rpm, 1 645 rpm and 1,,795 rpm. An inverter is an adjustable speed motor, using the 30 horsepower. To find the performance based on the theory of the Phoenician city แอ๊ฟ.1.497 rpm with minimal performance, then 1 645 rpm, performance, more 1 497 cycles per minute, and the 1795 RPM performance the most. Which in the test in this research found that the most effective is equal in 51% in the speed round used in the test. But the maximum speed, the 1497 RPM 1 645 rpm, and 1 795 rpm, with different performances.
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