Mechanical valve ( 5/2 way, port size 1/4 ) is operated manually. It is in sliding column structure so that the control force is not influenced by working pressure.
Available models: G522 ( no button ), G522R ( roller ), G522PP ( flat button ), G522PPL ( convex button ), G522B ( ิีmushroom button without lock ), G522EB ( mushroom button with lock ), G522TB ( single-step twisting button ), G522LB ( two-step twisting button )