a two - way seat - type valve is provided , having a valve seat which is arranged between a first and a second connection , and having a closure element which co - operates with the valve seat , is arranged in a guide so as to be movable towards the valve seat or away from the valve seat , and which is subjected to a control pressure prevailing in a pressure chamber on the side , remote from the valve seat , of the closure element . a valve of this type should also be able to exhibit good reaction characteristics with water as hydraulic fluid . for this purpose , the closure element is guided seallessly in the guide .