A valve assembly (10) for large scale irrigation including a valve body (20) and a valve head (40). The valve head is adapted to reciprocally travel along a longitudinal axis, supported by a longitudinally aligned shaft (60) inside the valve body. The valve head includes a wall (41) terminating in a peripheral sealing contact surface (42), the wall extending inwardly from the peripheral contacting surface.

Hydraulic valves for dampening pressure spikes and associated methods are disclosed herein. In one embodiment, a hydraulic valve for dampening pressure spikes includes: a spool configured to move axially inside the hydraulic valve; and a sleeve configured to at least partially house the spool. A location of the spool with respect to the sleeve may determine a flow of a working fluid through the hydraulic valve. A viscous damper is at least partially housed inside an opening in the spool, and a viscous friction between the viscous damper and the opening in the spool slows a motion of the spool.

There is provided a check valve capable of effectively suppressing the generation of chattering. The check valve includes: a housing including an inlet channel, a valve chest, and an outlet channel; a seat member provided around the inlet channel, the seat member including a seat portion; a valve element pressed against the seat portion to close the inlet channel; a biasing member configured to push the valve element toward a valve seat; a guide portion provided at the housing and configured to guide the valve element when the valve element moves in an axial direction; and a damper chamber communicating with the valve chest through a space between the valve element and the guide portion, the damper chamber being configured to attenuate axial moving force of the valve element. The biasing member is arranged in the valve chest.

A fluid valve includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. A valve seat is disposed within the fluid passageway. A fluid control member is movably disposed within the fluid passageway, the fluid control member cooperating with a trim assembly to control fluid flow through the fluid passageway. The trim assembly includes a cage having a plurality of openings that characterize fluid flowing through the cage and a plurality of vents that suppress noise generated by the plurality of openings.

A fluid-damped valve comprises a body defining an internal cavity having an inlet for ingress of a fluid and an outlet for egress of the fluid, and a closure member having a narrowed end portion. The closure member is movably disposed within the internal cavity intermediate the fluid inlet and the fluid outlet. The valve includes a seat configured to sealingly receive the closure member. The seat defines a constricted portion of the internal cavity configured to non-sealingly receive the narrowed end portion and damp the flow of the fluid through the fluid-damped valve.

A check valve comprises a valve housing defining a valve opening and a pair of flapper elements pivotably mounted to the valve housing for rotation relative to the housing between an open position in which they permit fluid flow through the valve opening and a closed position in which they prevent fluid flow through the valve opening. Each flapper element comprises at least one bumper element arranged to engage a stop when in the open position, the bumper element comprising an elastically deformable tongue extending from an upper surface of the flapper element.

A break check valve includes a valve body defining a mating surface and a valve inner cavity; a pivot pin positioned inside the valve inner cavity and secured to the valve body, an axis of the pivot pin offset in a radial direction with respect to a longitudinal axis of the valve body; and a valve member positioned within the valve inner cavity and configured to rotate about the pivot pin from an open position to a closed position of the valve, the valve member comprising a plate and an arm extending from the plate, the valve member configured to remain in the open position of the valve as long as a mating surface of a hydrant remains in contact with the mating surface of the valve body and configured to close when the mating surface of the hydrant is separated from the mating surface of the valve body.

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 relief valve includes: a housing; a plunger movable to each of a closed position and an open position; a differential pressure chamber; a spring member; a piston; and a damping chamber. The plunger includes a first damping passage penetrating the plunger and bringing an area outside the plunger and a through passage into communication. The piston includes a second damping passage penetrating the piston and bringing an area inside the piston and the damping chamber into communication. A communication space connected to each of the first damping passage and the second damping passage is formed between the plunger and the piston.

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.