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泵的水利模型一但做好，在额定转速下设计效率最高。随着转速降低效率逐渐下降。不是不可以任意转速，而是改了转速也就改了性能曲线。
当然不可以了一定按厂家标准操作。
理论上可以，但不满足条件的转速下，可能导致效率降低，能耗增大，流量、出口压力不满足，机封自冲洗的还可能因低转速造成机封故障等。故泵的使用实际是有转速要求的。
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