A control valve unit including a pair of valve bodies, a separator plate interposed between the pair of valve bodies and provided with an opening, a collar attached to the separator plate through the opening and having a valve port and a valve seat, a check ball separating from the valve seat and seating on the valve seat by hydraulic pressure to open and close the valve port, and a combining part combining the pair of valve bodies to sandwich the collar between an end surface of one of the pair of valve bodies and an end surface of the separator plate.

An oil jet device for supplying pressure oil which is supplied from a pressure oil supply source, includes a valve body and a supporting portion. The valve body is molded by cold-forging a metal material and accommodates a valve portion for controlling the supply of the pressure oil from the pressure oil supply source. The supporting portion is molded by cold-forging a metal material, supports the valve body, and has a first principal surface having a flat shape and configured to abut on an attachment target object.

A check valve which allows liquid to flow in one direction while preventing liquid from flowing in a direction reverse to said one direction, the check valve comprising: an inflow port allowing liquid to flow therein; an outflow port allowing liquid to flow out thereof; a valve seat provided between the inflow port and the outflow port, the valve seat having a valve hole through which the inflow port communicates with the outflow port; a valve chamber provided between the valve seat and the outflow port; a valve element disposed in the valve chamber, the valve element opening and closing the valve hole; a plurality of holding surfaces located radially outside the valve element, the holding surfaces extending in an axial direction; and an elastic member supported on the holding surfaces and set in the valve chamber, the elastic member applying an elastic force directed toward the valve hole to the valve element.

A method for removably securing a component within a bore having a shoulder, includes: forming a housing with a generally cylindrical wall with an open first axial end and a partially closed second axial end having an annular shoulder, and an annular lip section at the first end of the cylindrical housing wall, the lip section having a radially outwardly projecting and circumferentially extending annular ridge, an inner chamfer creating a frustoconical surface with a base toward the housing first axial end and an outer chamfer creating a frustonconical surface with a base toward the housing first axial end; and, inserting the housing into the bore, engaging the bore shoulder, engaging the inner chamfer of the housing lip section with a tool for applying axial force, the tool having a conical surface corresponding to and engageable with the housing inner chamfer, and applying axial force against the inner chamfer by means of the conical surface of the tool.

A pressure relief valve (PRV) is provided. The PRV includes a first housing part and a second housing part. The first housing part includes first major and minor surfaces and a first deformed corner at an intersection of the first major and minor surfaces. The second housing part includes second major and minor surfaces and a second deformed corner at an intersection of the second major and minor surfaces. The first and second housing parts are disposed with the first and second minor surfaces facing oppositely at a distance to define a metering hole. The first and second deformed corners are deformed by a coining ball to cooperatively form a coined seat at the metering hole for seating and re-seating a sealing ball. The first and second deformed corners have respective radii of curvatures resulting from deformation which are larger than that of the sealing ball.

A closed-loop refillable dispensing system may include one or more reusable or refillable product packages configured to dock with an automated filling station. The automated filling station automatically mixes concentrated chemical product with a diluent and dispenses the resulting chemical product solution. The product package may include a fitment insert configured to mate with a docking connector at the automated filling station. When the product package is removed from the docking connector, the fitment insert provides a positive, leak-proof seal for the product package.

A check valve has a cage assembly set within a cage assembly containment portion defined within a cylindrical housing member, where the cage assembly containment portion is bounded between a first circumferential shoulder and a second circumferential shoulder of the interior of the cylindrical housing member. The cage assembly has a valve seat, a spacer member, and a nylon insert, where the nylon insert has a fluid inlet end and a fluid outlet end, where the fluid outlet end has at least one ball stop member. The valve seat is urged against the first circumferential shoulder by, in respective order, the spacer member, the nylon insert, and the second circumferential shoulder which urges the nylon insert against the spacer member. A ball travel section is defined between the valve seat and the ball stop member and a ball is disposed in the ball stop section.

A hammer union back pressure regulator is provided. The hammer union back pressure regulator comprises a regulator body, a bonnet, a housing and a flow control member. The regulator body defines a flow inlet, a flow outlet, and a flow passage in fluid communication with the flow inlet and the flow outlet. The bonnet is coupled to the regulator body with a hammer union nut. The flow control member is configured to adjust the pressure at which the hammer union back pressure regulator will allow flow through the flow passage.

Methods and kits for assembling a flow cage assembly are provided. The flow cage assembly may be used in a traveling valve, a standing valve, or a top plunger adapter of a downhole reciprocating pump. In some embodiments, the method comprises assembling a body, a tubular insert, and a retaining element such that the retaining element forms an interference fit with the body and thereby securely retains the tubular insert within the body. Top plunger adapters are also provided, assembled from embodiments of the methods and kits.

Provided is a hydraulic control device having a valve member wherein the valve member includes a cylindrical sleeve including a first end and a second end which is opposite side to the first end, a valve body which is disposed on the second end side of a hollow portion in the cylindrical sleeve and opens and closes an oil path, a movable member which is disposed on the first end side in the hollow portion, movably accommodated along the hollow portion, and includes a pressure receiving surface provided to receive a hydraulic pressure and a contact portion provided to be brought into contact with the valve body according to the hydraulic pressure on the pressure receiving surface, and a movement stopping member which is disposed between the valve body and the second end and limits movement of the valve body toward the first end side within a predetermined range.