Check valve with low pressure loss

The low-pressure-loss check valve comprises a valve body and a valve clack, one side of the valve clack is hinged to the inner wall of the valve body, a first magnet is arranged on the side, away from the hinged side, of the valve clack, the valve body is provided with a second magnet, and when the valve clack is turned over to be opened, the second magnet forces the first magnet to be close to the second magnet. According to the check valve, the valve clack is not prone to swinging under the acting force of a flowing medium in all directions, and therefore the loss effect of the check valve on medium pressure in the using process can be reduced. 本申请涉及一种低压力损耗的止回阀，包括阀体和阀瓣，阀瓣的一侧与阀体的内壁铰接，阀瓣远离铰接侧的一侧设有第一磁体，阀体设有第二磁体，当阀瓣翻转开启时，第二磁体迫使第一磁体靠近第二磁体。本申请中的阀瓣不易在流动介质的各向作用力下出现摆动，从而有利于减少止回阀在使用过程中对介质压力的损耗作用。