Abstract: A hydraulic valve includes a valve body which is provided with a fluid inlet chamber, a pair of user chambers arranged for communication with users of the fluid admitted into the valve body and a pair of return chambers for recovering fluid from the users and recycling the fluid to a source of the same. The valve body further includes a longitudinal passage which connects the various chambers. A spool is slidably mounted in the longitudinal passage and, depending upon the position thereof, permits a user chamber to communicate with the fluid inlet chamber while the corresponding return chamber is sealed from the user chamber or permits the user chamber to communicate with the corresponding return chamber while the user chamber is sealed from the fluid inlet chamber. A flow channel extends across the width of the valve body and opens to either side of the latter. The flow channel is arranged for communication with the source of the fluid and with the fluid inlet chamber.

Abstract: A hydraulic control arrangement for control of fluid flow to a consumer device and comprising a three-position valve having a valve member movable between a neutral position closing at least one conduit leading to the consumer device and two working positions in one of which it connects the consumer device with a source of pressure fluid and in the other of which it connects the consumer device with a return flow conduit leading to a reservoir, a reversing valve for connecting the source of pressure fluid directly to the return flow conduit and a control conduit connected with the reversing valve. A throttle is provided in the control conduit which produces a pressure difference which can act on the valve member of the reversing valve to move the latter against the force of a spring, and the arrangement includes further means for control of the consumer device independent of the load pressure acting thereon.