In a valve actuating system having an actuating drive which has a drive housing and an output unit which is movably mounted in the drive housing for generating a stroke of a spindle of a valve for opening or closing a through-flow opening of the valve, wherein the output unit has a force pickup portion to which the spindle is coupleable or coupled and a fastening portion arranged opposite the force pickup portion, wherein the actuating drive furthermore possesses a holder, which is separate from the output unit, has a holder longitudinal-axis and has a fastening device by way of which it is fastened to the fastening portion of the output unit and a support device for supporting at least one position information element on the holder, and wherein the valve actuating system has a plurality of mutually different types of position information elements supported on the holder by way of the support device.

A pipe joint has a tube for fluid detachably fitted thereto, and is connected to a hydraulic device such as a cylinder. The pipe joint is provided with a resin body into which the tube for fluid is inserted, and a metal body which can rotate relative to the resin body. The resin body comprises orifices which each have a different opening diameter, and, as a result of the rotation of the resin body relative to the metal body, the orifices can be disposed in a connection part providing a connection path between the tube for fluid and the hydraulic device.

The invention relates to a connecting apparatus, provided for fluid-conducting connection to at least one main component (10), which component has a plurality of mutually adjacent fluid passage points (P1, P2, P3, Pn . . . Px), said connecting apparatus having a main body (12), which serves to control a fluid flow by means of at least one functional component (14), such as a valve device; a plurality of further fluid passage points (P1, P2, P3, Pn . . . Px), which 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); and at least 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 main body, said fluid passage point remaining unaffected by the functional component (14). Said connecting apparatus is characterised in that there is in each case a fluid-conducting connection line (30, 32) inside the main body (12) between the further fluid passage points (P1, P2, P3, Pn . . . Px) and the functional component (14), which fluid-conducting connection line can be shut off by a separate shut-off part, as long as the associated connection to the functional component (14) remains unused.

An apparatus for actuating a valve includes an actuator with a cap. A plate that engages the inner diameter of the actuator housing is positioned within the actuator housing. A pressure chamber is located within the actuator housing between the plate and cap. A cap seal fluidly seals the pressure chamber between the cap and the actuator housing. The pressure chamber is fluidly sealed at the plate by one of a first plate seal assembly and a second plate seal assembly. The first plate seal assembly is formed by the diaphragm being secured between a seal nut and the plate. The second plate seal assembly is formed by an outer diameter sidewall seal located between the inner diameter of the actuator housing and the outer diameter of the plate and a retainer seal located between an outer diameter of the seal nut and an inner diameter of the plate.

The invention relates to a piston-cylinder unit. The piston-cylinder unit has a piston motion sensor which is arranged in a transverse hole of a cylinder head having a longitudinal axis. According to the invention, the piston motion sensor is detachably connected to a housing plug through a sensor cable. The housing plug is L-shaped. One leg of the housing plug extends in the transverse hole of the cylinder head, while another leg extends lying externally from the cylinder head. The invention enables the operation of the piston-cylinder unit with housing plugs of different types.

The piston-cylinder unit according to the invention finds, for example, use for a work machine, construction machine, agricultural machine, maritime machine, wheel loader, excavator, dumper, crane, forklift or lifting platform.

Present disclosure discloses a seal assembly for an actuator rod of a pitch actuator. The assembly includes at least one first ring annularly interposed between an actuator rod and a cylinder cover, and removably supported by a first split retainer half pair in an annular recess defined in the cylinder cover. A first seal is annularly interposed between the actuator rod and the cylinder cover. A second seal annularly is interposed between the actuator rod and the cylinder cover is supported by a retainer. The seal assembly also includes a wiper seal which is annularly interposed and supported by a third split retainer half pair between the actuator rod and the cylinder cover. Each of the first, second and third split retainer half pairs, and the retainer is removably connectable to the cover.