The invention discloses a valve set for a hydraulic
coupling. The valve set comprises a valve body; the valve body is provided with a liquid inlet, a liquid outlet, a valve rod
piston and an
electromagnetic valve; the
tail part of the valve rod
piston is a back water cavity; the back water cavity is communicated with a water return way; the water return way controls connection and disconnection with a
signal water way through the
electromagnetic valve; an external filter is arranged on the water return way for fixedly connecting with the valve body, and is serially connected to the water return way; the external filter includes an outer shell and a
filter element; the shell is provided with a water way II and a water way III; one end of the water way II is connected with an inlet of the
filter element, and the other end is communicated with the water return way; one end of the water way III is communicated with an outlet of the
filter element, and the other end is communicated with the back water cavity through the water return way; and a flow valve
assembly is arranged in a liquid inlet of the valve set. Compared with a traditional valve set of a
coupling, the valve set for the hydraulic
coupling changes the structure design of a
piston, removes 1 m small holes in the head and
tail parts of the piston, reduces the
machining cost, and improves the reliability; the external filter is added in the valve body for preferably filtering impurities in water to preferably protect the piston in the valve set, to reduce the damage of the piston and to achieve longer service life; and the liquid inlet is added with the flow valve
assembly for guaranteeing stable liquid filling of the coupling without exceeding the standard, so that the safety and the stability of the valve set are improved.