A valve assembly, comprising: a valve duct having an upstream end, a downstream end and a duct wall extending from the upstream end to the downstream end; a first conduit extending from a first end at the valve duct to a second end spaced apart from the first end, the first conduit terminating at a valve assembly component; and a washing filter that includes filter media, wherein the filter media extends into the valve duct to remove particles and provide a clean flow to the first conduit, wherein the washing filter extends from the first end of the conduit into the valve duct; and a closure disposed within the valve duct between the upstream and downstream ends, and downstream of the washing filter; a shaft connected to the closure; and a torque motor operatively coupled to the shaft; a housing; a piston assembly disposed within the housing, the piston assembly including a piston chamber, the piston chamber defining a first wall and a second wall that is opposite the first wall, and a transverse wall extending from the first wall to the second wall, the first wall defining a first chamber aperture, the piston assembly including a first piston configured to move in the piston chamber between the first and second walls to define a first pressure chamber between the first piston and the first wall, the first piston being operationally connected to the shaft, wherein the valve assembly component is a flow chamber disposed in the housing, wherein the second end of the first conduit terminates at the at the flow chamber; a second conduit extending from a first end at the flow chamber to a second end at the first chamber aperture; a control member in the flow chamber that is configured to control access from the first conduit into the flow chamber, to thereby control access to the second conduit; and wherein the torque motor disposed in the housing and configured to control the control member. a valve duct having an upstream end, a downstream end and a duct wall extending from the upstream end to the downstream end; a first conduit extending from a first end at the valve duct to a second end spaced apart from the first end, the first conduit terminating at a valve assembly component; and a washing filter that includes filter media, wherein the filter media extends into the valve duct to remove particles and provide a clean flow to the first conduit, wherein the washing filter extends from the first end of the conduit into the valve duct; and a closure disposed within the valve duct between the upstream and downstream ends, and downstream of the washing filter; a shaft connected to the closure; and a torque motor operatively coupled to the shaft; a housing; a piston assembly disposed within the housing, the piston assembly including a piston chamber, the piston chamber defining a first wall and a second wall that is opposite the first wall, and a transverse wall extending from the first wall to the second wall, the first wall defining a first chamber aperture, the piston assembly including a first piston configured to move in the piston chamber between the first and second walls to define a first pressure chamber between the first piston and the first wall, the first piston being operationally connected to the shaft, wherein the valve assembly component is a flow chamber disposed in the housing, wherein the second end of the first conduit terminates at the at the flow chamber; a second conduit extending from a first end at the flow chamber to a second end at the first chamber aperture; a control member in the flow chamber that is configured to control access from the first conduit into the flow chamber, to thereby control access to the second conduit; and wherein the torque motor disposed in the housing and configured to control the control member.