Reciprocating pump check valve

The utility model discloses a reciprocating pump check valve, including first disk body, be used for and the second disk body of first disk body terminal surface butt, be located the first valve blockof ring form between first disk body and the second disk body, first disk body passes through bolt and nut fixed joint with the second disk body, run through on the terminal surface of first disk body and be provided with first air inlet duct, it is used for the air outlet groove that is linked together with first air inlet duct to run through on the terminal surface of second disk body to be provided with, be provided with the first spout that is used for supplying first valve block to slide and connect on the terminal surface of second disk body, first valve block is used for the terminal surface of first disk body to contradict to plug up first air inlet duct notch, and then the gaseous air outlet groove of follow of restriction flows in first air inlet duct. Because first valve blockis the face contact with f