The hot water in the water heating exchanger can be delivered to a tank that needs to be heated, and the hot water passing through the tank can be sent back to the water heating exchanger under the pressure, so as to form a cycle.The pump body is mechanically sealed, and impeller is directly installed on the motor shaft, which has the characteristics of high efficiency, low energy consumption, compact structure, convenient maintenance, etc., and can be used in parallel or in series according to the requirements of the hydraulic head and flow.

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