A valve stem lifter assembly which operates to alternatively open and close a valve, includes a rotatably mounted rotary shaft having a free end axially aligned with a pull shaft and an opposite free end axially aligned with an operator for selectively producing rotational movement of the rotary shaft and corresponding axial movement of the pull shaft. The rotary shaft is rotatably connected to a valve riser element by radius set screws positioned axially in the grooves of the rotary shaft. A plurality of guide shaft rods interconnects the riser to the valve stem lifter assembly to prevent axial separation of the riser and rotary shaft while permitting free relative rotation of the rotary shaft and linear movement of the pull shaft.

Embodiments of the invention provide a piston assembly for a control valve in a water softener system. The control valve includes a drive mechanism, one or more fluid passageways, and a seal assembly. The piston assembly includes a main piston moveably received within the seal assembly and including a first end and a second end opposite to the first end, and a shuttle piston moveably received within the seal assembly. The shuttle piston includes a first end and a second end opposite to the first end, and is configured to selectively engage the second end of the main piston to form a seal therebetween and to selectively move relative to the second end of the main piston to form an opening between the second end of the main piston and the first end of the shuttle piston, in response to movement of the main piston.

An eclipse valve includes at least two reciprocating obturator plates captured in a sealed housing. The obturator plates fill the width of a cavity within the housing and can be moved between aligned and unaligned positions. Each of the obturator plates have an opening through the plate, and when the obturator plates are aligned, the openings through the plates are aligned with each other, and with front and rear openings in the housing, allowing flow through the valve. The plates can be moved to reduce the overlap of the openings through the plates within the housing in an eclipse manner to adjust the rate or amount of flow, and to shut off flow by completely un-aligning the openings.

An exemplary valve control system includes a master controller that wirelessly communicates with a plurality of slave controllers. The slave controllers are each associated with respective devices and sensors. In exemplary arrangements a valve slave controller is associated with a motor that controls a condition of a valve. An exemplary control valve includes a valve body with a plurality of ports (A, B, C, D, E, F) and a plurality of annular flow passages. A piston is selectively movable within a bore within the valve body through operation of the motor and valve slave controller. The valve slave controller is selectively operative to control the position of the piston so as to selectively enable liquid flow through the valve.

A control valve (10) includes a valve body with a plurality of ports (A, B, C, D, E, F) and a plurality of annular flow passages (53, 55, 57). A piston (34) which includes a plurality of annular flow passages and a longitudinal flow passage is selectively movable within a bore (32) within the valve body through operation of a valve controller (70). The valve controller is selectively operative to control the position of the piston so as to enable liquid flow through a plurality of flow paths. The valve controller further includes a installable and removable valve controller housing (74) which is releasibly engageable with a valve base (72). The valve may include a changeable multi-piece piston and changeable injector and plug components to adapt the valve to different flow and fluid mixing requirements.

A valve comprising: a valve body; and a valve stem disposed at least partially within the valve body, the valve stem comprising a sidewall defining a central lumen and at least one opening in the sidewall, wherein the valve is adapted to prevent fluid flow through the lumen when the at least one opening is disposed within the valve body and permit fluid flow through the lumen when the at least one opening is exposed from the valve body, and wherein the valve is essentially free of a spring.

The invention relates to a vacuum valve (10) for the substantially gas-tight closure of an opening defining an opening axis, comprising a closure element (14) having a closure side and a coupling unit arranged on a rear side opposite the closure side, and a valve wall having valve seat (12a) surrounding the opening. The valve further comprises a linear drive unit by means of which the closure element (14) is adjustable in at least two adjustment directions substantially orthogonally to the opening axis along an adjustment axis and thus the closure element (14) is adjustable between an open position releasing the opening, an intermediate position pushed over the opening and a closed position closing the opening. The vacuum valve (10) comprises a guide for the closure element (14) associated with the opening. The closure element (14) comprises a guide element (25) interacting with the guide during an adjustment from the open position to the closed position and back, and the guide and the guide element (25) are shaped and interact in such a way that, in the course of the adjustment from the intermediate position to the closed position, a tilting of the closure element (14) transversely to the adjustment axis is initiated and/or effected in a first partial movement.

An eclipse valve includes at least two obturator plates captured in a sealed housing that are driven to move in opposite directions relative to each other within the sealed housing. The obturator plates fill the width of a cavity within the housing and can be moved between aligned and unaligned positions. Each of the obturator plates have an opening through the plate, and when the obturator plates are aligned, the openings through the plates are aligned with each other, and with front and rear openings in the housing, allowing flow through the valve. The plates can be moved to reduce the overlap of the openings through the plates within the housing in an eclipse manner to adjust the rate or amount of flow, and to shut off flow by completely un-aligning the openings.

A valve device includes: a pilot chamber cover to which pilot pressure is introduced, the pilot chamber cover including a through hole extending in a direction intersecting with an axial direction of the spool; an operating pin configured to swing with movement of the spool in the axial direction; a rotating shaft configured to turn with swinging of the operating pin; a coupling plug coupled to the rotating shaft, a part of the coupling plug inserted into the through hole, the coupling plug being configured to switch between a coupled state where rotational force of the rotating shaft is transmitted to the coupling plug and a canceled state where the transmission of the rotational force of the rotating shaft to the coupling plug is canceled; an operating lever coupled to the coupling plug; and a sealing member between an inner peripheral surface of the through hole and the coupling plug.

A plumbing fitting with a body having a flow path extending therethrough, and a receptacle disposed in the body is disclosed. The receptacle is arranged to releasably receive a mechanism is movable between a first operational position in which the flow path extends through the receptacle and the mechanism, and a second position in which the flow path bypasses the mechanism. In the second position, the mechanism can be released from the receptacle while a fluid flows through the flow path.