An electro-pneumatic actuator, such as a positioner or an I/P transducer array, for a field device of a processing plant, such as a brewery, a petrochemical plant or the like, can include a pneumatically operated display configured to visually and/or acoustically display at least one field device-specific operating information. The information can include a drive or valve position, or a regulating variable. The electro-pneumatic actuator can be configured to output at least one pneumatic drive actuating signal to a pneumatic drive so as to set a final controlling device, such as a control valve, of the field device. The electro-pneumatic actuator can be configured to output at least one pneumatic display actuating signal to the pneumatically operated display, which can differ from the pneumatic drive actuating signal.

An electropneumatic valve assembly comprises an electropneumatic pilot stage and a pneumatic power stage which is actuated by the pilot stage. Each pilot valve switches at least two power valves, and the valve assembly has a housing with an electrical signal input, with a compressed-air port, at least one vent port and at least one working outlet. The housing is layered with a pilot stage housing and a power stage housing connected along a substantially planar parting surface. At least one sealing element is between the pilot stage housing and power stage housing surrounding a control pressure region between the pilot stage housing and power stage housing. The control pressure region has two actuation regions for two power valves and has a duct-like connection with a defined flow cross section between the two actuation regions. An outlet of the associated pilot valve opens into the control pressure region.

An electromagnetic valve device having a fluid inlet port (1), which is formed in a valve casing (10), for a fluid to be switched, in particular pneumatic fluid, a working port (2), which is realized in the valve casing, for the fluid and locking component(s) (14), which are moveably guided in the valve casing along an axial direction and which are realized for interacting with a valve seat (26) formed in the valve casing and opening a fluid flow path between the fluid inlet port and the working port and which are moveably realized via fluid switched by means of electromagnetic positioning means (32).

An actuating unit for a process valve is described, which comprises a pilot valve unit, a separate removable seal arranged between two parts through which a fluid can flow, and a piston configured for the adjustment of the process valve. The seal has through openings for the passage of fluid, and the adjacent parts have holes, such that different holes are in fluid communication with each other via the through openings or are fluidically separated due to an intermediate wall portion of the seal depending on the fitting position of the seal. A process valve having such an actuating unit is furthermore described.

A control valve device includes a valve block that switches the flowing direction of a working fluid supplied to and discharged from a boom cylinder and an arm cylinder (actuators). The valve block includes an actuator port connected to the boom cylinder, and a supply port, a discharge port, and a regeneration port communicating with the actuator port. A supply valve is provided between the actuator port and the supply port, and a discharge valve is provided between the actuator port and the discharge port.

A control device, in particular for hydraulically controlling components of mobile working machines, has a pressure supply connection (P) and a tank or return connection (T) in addition to two user connections (A, B). Control and/or regulating valves (10, 14, 16, 18) are connected between the individual connections (P, T, A, B). Two control lines (C, Z) can control at least one of the control and/or regulating valves. A modular-type functional block (24, 26) is connected to at least one of the control lines (C, Z).

A Hydraulic Manifold Control Assembly for use in connection with surface blowout preventers and diverter control systems. Said Hydraulic Manifold Control Assembly incorporates design elements and methods which reduce overall envelope dimensions, improving maintenance accessibility, thereby reducing overall installation and manufacturing time and ultimately contributing to a more robust, cost effective end-product. Said design elements and methods include: the use of intrinsically safe I/O modules and components; the employment of a removable valve assembly rack installation method; the use of a removable face plate for identification of flow control valves; the implementation of a digital automatic diverter sequence; the use of integrated manifold assemblies; and the integration of a wide-range function count.

A fluid valve manifold has an electrical conduit for receiving a circuit board assembly that actuates a plurality of valve units. The circuit board assembly is reversibly and rotatably mountable to a first position or second position in the electrical conduit such that a respective set of first electrical connectors at a first end or a second set of electrical connectors at a second end opposite that of the first end may be in position to receive electrical signals through the respective connectors. When in one position, the circuit board assembly is able to serve a single solenoid valve unit. When in a rotated second position, the circuit board is able to serve a double solenoid valve unit.

A connecting apparatus connects to a main component (10) having a plurality of mutually adjacent fluid passage points (P1, P2, P3, Pn . . . Px). The connecting apparatus has a main body (12) controlling a fluid flow by a valve. A plurality of further fluid passage points (P1, P2, P3, Pn . . . Px) can be connected to each other in a fluid-conducting manner via the functional component (14) with assignable fluid passage points in the main component (10). One shut-off part, which shuts off the respective fluid passage point (P2, P3, Pn . . . Px1) in the main component (10) and/or in the fluid passage point remains unaffected by the functional component (14). In each case a fluid-conducting connection line (30, 32) is inside the main body (12) between the further fluid passage points (P1, P2, P3, Pn . . . Px) and the functional component (14) and can be shut off by a separate shut-off part, as long as the associated connection to the functional component (14) remains unused.

A solenoid valve system is described which has a solenoid valve and a base operatively connected to the solenoid valve. Each solenoid valve has a compressed air supply conduit, a compressed air delivery conduit, air discharge conduit, air distribution box, configured so as to selectively put in fluid connection the conduits of the solenoid valve, and an electropilot, configured for activating the air distribution box. Each base has a plurality of housings each able to receive a single solenoid valve. Each housing is internally provided with air passage conduits that are put in fluid connection with the conduits of the solenoid valve fixed on the housing. Each base is selected from a group consisting of a base with three housings and a base with four housings.