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The bidirectional flow hard impact hard rotation ball valve is developed by combining the superior sealing performance of ball valves with the advantageous structural performance of butterfly valves. It not only has the practical advantages of superior sealing, adjustability, high operating temperature, and long service life of ball valves, but also has the structural advantages of small volume and light weight of butterfly valves. Its essence is a butterfly structure eccentric hemispherical valve, which is superior to hemispherical valves and fixed ball valves in installation. The sealing principle combines the front end sealing of the fixed ball valve with the forced sealing of the eccentric butterfly valve, thereby achieving fluid cut-off. When the water pump stops running and the outlet pressure of the pipeline is higher than