1. Pumping unit (10), in particular for water jet surgery, comprising a pump housing which contains the first body portion (11) and a second body portion (17), wherein the first housing part (11) contains at least two cylinders (12, 13) of the pump, which is equipped to accommodate the pistons (15, 16) of the pump, wherein the second housing part (17) contains a suction channel (18) and discharge channel (28), wherein inlet valves (25, 27, ) are active between the cylinders (12, 13) of the pump and the suction duct (18) and outlet valves (34, 35) are active between the cylinders (12 13) of the pump and the discharge channel (28), each inlet valve (25, 27) comprises an inner portion (39) in which in each case is a ball (43) of the valve, wherein the inner part (39) contains the inlet (45) and an outlet (54), characterized in that the inner part (39) is formed by one of the parts (11, 17) of the housing at least in one position (52) and another part (36, 38) in the other position othing ball (43) of the valve is supported so as to be capable of free movement in the inner part (39) .2. The pump unit according to Claim. 1, characterized in that the other part (38) is a second body portion (17) or a part (36) of the sleeve which is disposed in the second body portion (17) .3. The pumping unit of claim. 2, characterized in that the inlet (45) located on the second body portion (17) or to a part (36) of the sleeve and defines a seat (44) klapana.4 body. The pumping unit of claim. 3, characterized in that the second housing part (17) or a part (36) of the sleeve forms an appendage (38) which projects into the pocket (49) of the first body portion (11) .5. The pumping unit of claim. 4, wherein the appendage (38) and the first Corp.1. Насосный блок (10), в частности, для водоструйной хирургии, содержащий корпус насоса, который заключает в себе первую корпусную часть (11) и вторую корпусную часть (17),причем первая корпусная часть (11) заключает в себе по меньшей мере два цили
