In a fluid control valve, a cylinder chamber includes a first pilot chamber extending from a piston in one of sliding directions. An opening of a first pilot port allowing supply and discharge of fluid is formed in the inner wall of the first pilot chamber. The fluid is accommodated in the first pilot chamber when the piston is in a valve open position, and discharged via the opening when the piston is displaced toward a valve closed position. At least one of the piston and a valve body includes a throttle portion forming, between the piston and the valve body, a throttle path having a cross-sectional area smaller than the area of the opening, after the piston starts being displaced from the valve open position toward the valve closed position.

Seat valve, with a valve body having a plurality of inlet channels, with a plurality of closing elements arranged movably in a longitudinal direction L, each inlet channel being assigned a closing element for opening and closing the inlet channel, with a closing spring assigned to each closing element. The closing spring applies a prestressing force to the respective closing element to close the inlet channel. Each closing element assigned a braking device which is arranged separately from the closing element and which gradually brakes an opening movement of the closing element when the inlet channel is opened, independently of the closing spring. The braking device having a stop body with a stop surface against which the closing element can be brought to bear after an opening movement when the inlet channel is opened, the stop body being arranged movably and/or yieldingly in the opening direction of the closing element.

A shower system includes a shower waterway and a fluid control valve. The shower waterway is configured to be coupled to a shower device. The fluid control valve is coupled to the shower waterway and comprises a valve body and a piston. The valve body includes a chamber and a reservoir. The piston is slidably coupled to the valve body and fluidly separates the chamber from the reservoir. The chamber includes a compressible gas. The piston is configured to slidably translate within the valve body to compress the compressible gas in response to a water pressure change in the shower waterway.

A silencing choke for a solenoid valve can include a base and a stem configured to be coupled to an armature and can be configured for at least partially reducing or eliminating noise caused by armature bounce. A choke can be configured for limiting maximum flow through an orifice during at least a portion of a valve transition, which can include creating a state of orifice limited flow during the occurrence of armature bounce. A choke can be configured for at least partially reducing cross flow among ports and for limiting a maximum flow rate through at least one flow path of a valve.

A flow rate ratio control valve includes a pair of plate springs, each of which applies elastic force in a predetermined direction in accordance with the amount of deformation, a valve body supported by the pair of plate springs to be movable in the predetermined direction, a drive unit which drives the valve body in the predetermined direction in a non-contact state by means of electromagnetic force applied to a region between the pair of plate springs in the predetermined direction, a container in which the plate springs and the valve body are contained, and a damper which is attached to the valve body, defines a sectioned predetermined space in cooperation with an inner surface of the container, and forms a predetermined gap between the damper and the inner surface, the predetermined gap establishing communication in the predetermined direction between the predetermined space and the exterior of the predetermined space.

A hydrant includes: a hydrant body defining a hydrant inner cavity, the hydrant configured to couple to and be in fluid communication with a fluid distribution system including a fluid therein under pressure; and a break check valve coupled to the hydrant body, the valve including: a valve body defining a valve inner cavity, the hydrant inner cavity defining a valve bore in fluid communication with the fluid during normal operation of the hydrant; a valve member configured to rotate from an open position to a closed position of the valve; and an arm in contact with the hydrant and configured to prevent movement of the valve member when the hydrant is coupled to the valve, the valve defining a hole separate from the valve bore and in fluid communication with each of the hydrant inner cavity and the valve inner cavity.

A hydraulic valve includes a closure member, wherein the closure member is actuable toward an opening sealed thereby in the valve, but is unconstrained to move with respect to the opening when the valve is in a dosed position. In an aspect, the closure may be a thin disk, in the shape of a flat washer, which is located between the valve and piston of a hydraulic damper, and when the valve is positioned away from an opening through the piston by virtue of differential pressure across the valve in a dampening r rebound stroke, the disk is free to rotate, move from side to side, and move away from and toward the piston. By employing such a disk, sympathetic vibrations in the damper created during compression events are eliminated.

A valve, with a valve housing, through which process medium can flow and in which a valve seat which surrounds a throughflow opening is arranged, to which valve seat a valve element which is arranged on a spindle is assigned in a manner such that the valve element by way of an actuation travel of the spindle is movable between a shut-off position, in which the valve element sealingly bears on the valve seat in a process-medium-tight manner, and an open position, in which the valve element is lifted from the valve seat, and with a fluid-actuated valve drive which includes a drive housing and a drive wall which together with the spindle forms a drive unit and which separates two working spaces from one another, of which working spaces at least one can be subjected to pressure, and with a travel limitation device which for limiting the opening travel of the spindle includes a stop element which is fastened to the drive housing and which with an end section which includes a stop surface projects into a travel limitation space, in which the drive unit can strike upon the stop surface for limiting the opening travel, the travel limitation space is constantly under atmospheric pressure and the stop element is formed by a shock absorber housing of a shock absorber.

A subplate mounted valve is disclosed having an open position and a closed position. The valve includes at least one pilot pressure intake port, a plurality of functional fluid ports, a spool movable between the open position and the closed position, and spring biasing the spool to either the open position or the closed position. To reduce water hammer due to quickly opening or quickly closing the valve, a flow regulation assembly is positioned at the pilot pressure intake port and has a chamber with a larger inlet channel at the intake position and transitioning to a smaller channel at the outlet position such that fluid flow at the intake port is reduced, thereby slowing the transition between the open position and the closed position and the transition between the closed position and the open position.

A method of controlling a hydraulic valve includes putting a first control chamber under pressure and putting a second control chamber to return so as to cause a slide to move into one of two end positions, putting a second control chamber under pressure and putting the first control chamber to return, thereby causing the slide to move into the other one of the two end positions. An intermediate step of applying pressure to the one of the first or second control chamber that was connected to return can be provided so that both control chambers are maintained simultaneously under pressure for a determined length of time.