A valved manifold module is constructed and arranged to be readily connected in a chain with similar modules to form a manifold assembly. The modular apparatus allows for expansion or modification of the manifold assembly to suit applications that comprise a group of pneumatically or hydraulically driven pumps, valves or combinations thereof in a liquid flow control apparatus. The valved manifold module can be configured to accept a group of four substantially identical valve assemblies, and can be controlled by a local controller mounted to the manifold module, thus forming an independently programmable valved manifold module. The resulting modular system is expandable to allow for coordinated operations of a liquid flow control system, using substantially independent controller functions originating at the manifold assembly level.

A device for selectively controlling the flow of hydraulic fluid through the pilot valve comprises a longitudinal axis (A) and a housing, an internal cavity, at least one inlet passage, at least one outlet passage, a guide disposed in the internal cavity, a first seat disposed in the internal cavity, a second seat disposed in the internal cavity, a movable blocking member disposed in the guide cavity, and an actuator configured to control the position of the movable blocking member.

A three-way solenoid valve comprising: a valve block including a valve chamber and a first port, a second port, and a third port fluidly communicating with the valve chamber; an armature; a body; a plunger; and a flow path control assembly that is disposed inside the second body and includes a first opening/closing flow path, which allows the first port and the second port to fluidly communicate with each other or to be blocked from each other according to a magnitude of a force applied by the plunger, and a second opening/closing flow path which allows the second port and the third part to fluidly communicate with each other or to be blocked from each other according to the magnitude of the force applied by the plunger.

A valve body has an inflow passage for a working fluid, an outflow passage for the working fluid, and a pressure relief passage, which connects the inflow passage and the outflow passage by bypassing a normally close valve seat. A pressure relief valve is located in the pressure relief passage. The pressure relief valve closes the pressure relief passage, if a pressure of the working fluid in the outflow passage is lower than, is equal to, and is higher by a pressure difference less than a predetermined relief pressure than a pressure of the working fluid in the inflow passage. The pressure relief valve opens the pressure relief passage, if the pressure of the working fluid in the outflow passage is higher by a pressure difference equal to or higher than the relief pressure than a pressure of the working fluid in the inflow passage.

A directional control valve has a first fluid path extending between first and second ports and a second fluid path between second and third ports. A spherical valve member moves between an open position in which the valve member is displaced from a first valve seat so that the first fluid path is open and is sealed against a second valve seat so that the second fluid path is closed and a closed position in which the valve member is sealed against the first valve seat so that the first fluid path is closed and displaced from the second valve seat so that the second fluid path is open. The valve member is biased towards the closed position by opposed first and second biasing members of unequal loading. An actuator can move the valve member from the closed position to the open position against the unequal loading.

An electropneumatic magnet valve for a pneumatically actuated field device can include a valve member, an electromagnetic controller, a magnet valve member, and an activator. The valve member can be moveable between at least two operating positions for ventilating and/or exhausting a magnet valve exit. The electromagnetic controller can move the valve member between the operating positions. The magnet valve member operator can move, additionally with respect to the electromagnetic controller, the valve member independently of an operation of the electromagnetic controller. The valve member operator can include an activator to selectively generate/provide a magnetic field for contact free operation of the valve member via which the magnet valve member operator is changeable between a passive operating condition and an active operating condition.

A pneumatic mixing valve is provided, which includes a housing that defines a first inlet, a second inlet and an outlet. The first inlet is coupled to a first fluid source and the second inlet is coupled to a second fluid source. The housing defines a first chamber and a second chamber. The pneumatic mixing valve includes a mixing system. The mixing system includes a piston that is movable by at least one of the first fluid and the second fluid. The housing defines a fluid passageway that extends from near the first inlet to the second chamber and the pneumatic mixing valve includes an actuator that is movable between a first position and a second position. In the first position, the fluid passageway is closed such that the outlet is open, and in the second position, the fluid passageway is open such that the outlet is closed.

A pneumatic valve, includes an air chamber, a connector for supplying compressed air to the air chamber and one or more connectors for discharging compressed air from the air chamber. The valve includes an actuator with a mobile closure element which, when the actuator is activated, blocks the supply of compressed air via the supply connector, and when the actuator is deactivated, is arranged to permit the supply of compressed air via the supply connector. The actuator is configured such that the closure element, on deactivation of the actuator, is moved by a restoring force into the free position. A check valve with a spring is arranged at the supply connector. The elastic force of the spring in the free position of the closure element prevents back-flow of compressed air from the air chamber into the supply connector when there is no supply of compressed air at the supply connector.

A fluid control valve and valve assembly including the fluid control valve are disclosed. The valve includes a valve body comprising a supply port and an exhaust port, each of which are in selective communication with a control port. A valve sealing member is located between a supply valve seat and an exhaust valve seat, and is supported for linear displacement between at least a first valve position and a second valve position. In the first valve position, the valve sealing member is pressed against the exhaust valve seat such that the supply port is in fluid communication with the control port and fluid pressure at the control port is high. In the second valve position, the valve sealing member is pressed against the supply valve seat such that the control port is in fluid communication with the exhaust port and fluid pressure at the control port is low.

An electromagnetic valve includes: a housing, a ball valve, a ball guide to hold the ball valve, a shaft that displaces the ball valve; an electromagnetic solenoid part that drives the shaft; a seat component; and a seal member. The seat component has a cylindrical portion disposed inside of the housing, and has a predetermined depth in an axial direction. An inflow valve port passes through a first end of the cylindrical portion in the axial direction. The seal member is coupled with an outer circumference part of the housing at a position corresponding to the cylindrical portion.