Abstract: A plunger, a hydraulic end and a plunger pump are disclosed. The plunger includes a plunger body, the plunger body includes a flow channel; a first liquid inlet hole is located in the plunger body and passes through the sidewall of the plunger body; the plunger body includes a first end portion and a second end portion, a flow channel extends from the first end portion to the second end portion, a part of the flow channel close to the first end portion is closed, the flow channel extends to the second end portion and forms a first opening, the first liquid inlet hole is communicated with the flow channel, the first valve assembly is located at the first opening, and is configured to allow fluid to flow out from the flow channel at the first opening and prevent fluid from flowing back to the flow channel from outside.

Abstract: A diaphragm valve includes an outer wall section for valve seat mounting provided in a primary-side opening section, a stepped section provided on the inner periphery of the outer wall section, a seat ring press-fitted into and fixed to the stepped section, a flange section provided in the seat ring, and a press-fitting groove for valve seat mounting configured with a space between the seat ring and the outer wall section and the flange section, in which a valve seat press-fitted into and fixed to the press-fitting groove has an upper portion slightly protruding in a state where an extension section covers a position in the vicinity of a top portion of the outer wall section and an extension section the inner periphery of which is decreased in the upper portion of the valve seat covers a position in the vicinity of a top portion of the seat ring.

Abstract: A valve assembly for a high-pressure fluid pump is described herein. The valve assembly includes a valve seat disposed in a cylindrical bore in a fluid end of the pump, and a valve body that includes: a top plate defining at least one pressure window, a lower sealing surface disposed below the top plate, and a dampener disk disposed between the top plate and the lower sealing surface, the dampener disk configured to expand in response to pressure exerted thereon via the top plate and through the at least one pressure window.

Abstract: A dart valve includes an inlet centralizer to receive a stem extending from the cone body. The inlet centralizer can stabilize the movement of the cone body by constraining the radial movement of the cone body within the housing. Because the radial movement of the cone body is limited, wear and damage to the cone body and other components of the dart valve is minimized. The dart valve can be utilized in high pressure applications and can be used in horizontal and vertical orientations. Because of this, the dart valve can provide reliable operation in various arrangements.

Abstract: A check valve comprises a housing, a fluid passage, a seat, a valve member and a stop. The fluid passage extends through the housing. The seat is disposed in the fluid passage. The valve member is positioned in the passage to engage the seat. The stop extends through the housing to engage the valve member. The stop is accessible from outside the housing to adjust a distance the valve member can travel from the seat. In one embodiment, the stop includes a variable stop feature, such as an offset pin or a cam. In another embodiment, the stop includes a pump control valve. In yet another embodiment, the housing includes markings to indicate a position of the stop. The valve member comprises a ball or a poppet in different embodiments.

Abstract: A valve for a pump for delivering fuel includes a closing element mounted in a valve body so as to be movable along an axis, wherein the closing element is designed to close off a duct of the pump, wherein an actuator is provided which is operatively connected to the closing element, wherein the closing element has a first contact surface, wherein the actuator has a second contact surface, wherein the closing element and the actuator are in contact with one another via the contact surfaces, and wherein the contact surfaces are at least partially in the form of spherical surfaces.

Abstract: Tunable fluid end embodiments comprise a family, each family member comprising a pump housing with at least one installed tunable component chosen from: tunable valve assemblies, tunable valve seats, tunable radial arrays and/or tunable plunger seals. For example, a tunable valve assembly or tunable radial array selectively attenuates valve-generated vibration at its source, thus reducing the likelihood of fluid end failures associated with fatigue cracking and/or corrosion fatigue. Adding tunable valve seats and/or tunable plunger seals to a fluid end facilitates optimal damping and/or selective attenuation of vibration at one or more predetermined (and frequently localized) fluid end resonant frequencies. Thus, the likelihood of exciting destructive resonances in a pump's fluid end housing is further reduced.

Abstract: A tunable valve assembly attenuates valve-generated vibration at one or more predetermined assembly resonant frequencies. The assembly comprises a valve body having a peripheral groove spaced radially apart from a central reservoir. An adjustable preload flange is centrally coupled to the valve body for changing assembly compliance and for imposing a shear preload by partially constraining a viscoelastic element in the reservoir. Assembly resonant frequencies are thus predictably altered. Further, the vibration spectrum is narrowed and its amplitude reduced through hysteresis loss of closing impulse energy at each such altered resonant frequency. At least a first predetermined assembly resonant frequency is achieved through adjustment of shear preload, and at least a second predetermined assembly resonant frequency is achieved through choice of a viscoelastic or composite element in the peripheral groove.

Abstract: A compression-type valve seating ring device for sealingly engaging the valve seat. The seating ring device includes a resilient cylindrical body having a central axis and having a side surface, a top surface and a bottom surface. A first inward bevel is defined circumferentially from the side surface toward the top surface, and a second contour is defined circumferentially between the first bevel and the top surface, wherein the first bevel provides a seating surface and the second contour enhances the seal and life of the valve. The valve element is configured symmetrically such that top and bottom sides are substantially identical.

Abstract: A variable force actuator with a double needle poppet assembly includes a housing in which a first poppet and a second poppet are slidably disposed. The second poppet fits within the first poppet, and both poppets move when a nearby coil is energized to establish, in combination, a fluid flow configuration in response to the amount of energy applied to the coil.