A non-return insert valve (100) for a fluid circuit, in particular of a vehicle, this valve (100) being configured to be inserted into a pipe (12) and comprising: a tubular body (102), a ring (104) comprising guides (140), a piston (106) configured to slidingly cooperate with said guides (140) and carrying a seal (146), and an elastically deformable member (108) for biasing said seal (146) in axial support against a seat (124) of the tubular body (102), said piston (106) comprising at its external periphery lugs (166) which are configured to be supported axially against an internal cylindrical shoulder (126) of said body (102), in order to precisely define a first position of the piston, the fluid being intended to flow between these lugs (166) when the piston (106) is in a second position.

A flush valve includes a valve housing defining a fluid passageway between a fluid inlet and a fluid outlet. The fluid passageway includes a diaphragm valve seat disposed between the fluid inlet and the fluid outlet. The flush valve additionally includes a diaphragm assembly including a diaphragm and a disc. The diaphragm includes a primary opening and a bypass opening. The primary opening receives the disc therein and the bypass opening allowing water under pressure supplied to the fluid inlet to pass from a fluid inlet side of the diaphragm into a chamber in the fluid passageway. The flush valve additionally includes a relief valve configured to selectively control fluid flow from the chamber to the fluid outlet. The relief valve comprises a stationary valve element and a rotatable valve element each having at least one opening and being rotationally positionable relative to one another to regulate fluid flow.

A valve assembly includes a valve housing having an inlet, an outlet and an opening, and an insert removably insertable in the opening. The insert has a first side facing upwards and a second side facing downwards when positioned in the opening. The first side and the second side have a conduit positioned therebetween, and a control valve located at least partially within the conduit and movable between an open position and a closed position. The control valve in the closed position stops fluid from passing through the conduit. When the insert is inserted in the opening and the control valve is in the closed position, the insert substantially seals the inlet and stops fluid flowing to the outlet.

A valve assembly includes a valve housing having an inlet, an outlet and an opening, and an insert removably insertable in the opening. The insert has a first side facing upwards and a second side facing downwards when positioned in the opening. The first side and the second side have a conduit positioned therebetween, and a control valve located at least partially within the conduit and movable between an open position and a closed position. The control valve in the closed position stops fluid from passing through the conduit. When the insert is inserted in the opening and the control valve is in the closed position, the insert substantially seals the inlet and stops fluid flowing to the outlet.

The invention relates to a method for producing a rotary slide valve for regulating a flow of a fluid, comprising a rotary slide (02) which is rotatably mounted about a rotational axis (R) in a valve housing. The method has the steps of: producing the rotary slide (02) in an injection molding method, in particular in a plastic injection molding method; producing at least one circumferential or casing section (04) of the valve housing (03) in an injection molding method, in particular in a plastic injection molding method; and installing the rotary slide valve or a precursor thereof. According to the invention, a gap is formed between the rotary slide (02) and the directly adjacent valve housing circumferential or casing section (04) of the valve housing (03) in the radial direction, said gap allowing the rotary slide (02) to rotate about the rotational axis (R) and facilitating a seal which does not exceed a tolerable leak between the rotary slide (02) and the circumferential or casing section (04) of the valve housing (03).

A conversion kit creates a redundant hydraulic, pneumatic, or mechanical control functionality for low-torque, quarter-turn plug valves in remote production environments (i.e., rural or subsea pipelines). The conversion kit comprises at least one custom end cap fitted to the valve and comprising a socket receiving a rotator attachment. Each rotator attachment is in turn connected to a crossover which connects to a bracket remotely actuated via hydraulic, pneumatic, or mechanical control. The linear movement of the bracket and the attached crossover[s] is converted to rotational force which is transmitted through the rotator attachments to the at least one valve.

A valve stem for use in a fluid flow control valve having a valve body configured to receive a portion of the valve stem and to enable the valve stem to selectively rotate within the valve body between a fully-open position, where fluid is permitted to flow through the fluid flow control valve, and a fully-closed position, where fluid is prevented from flowing through the fluid flow control valve. The valve stem includes an elongate valve stem arm having a first end and a second end and a valve stem head integrally formed with and fixedly attached to the second end of the valve stem arm. The valve stem head includes a fluid inlet formed in the valve stem head, and a fluid outlet formed in the valve stem head, and a fluid passage that directs fluid from the fluid inlet, through the valve stem, and out of the fluid outlet.

A dental valve device has a valve body having a tip receiving end having a flexible tubing extending outwardly from the tip receiving end with the flexible tubing having a flexible tubing opening, a hose receiving end, a lumen formed between the flexible tubing opening and the hose receiving end, and a partial opening formed in the valve body, and a rotatable valve sealing body adapted to be inserted into the partial opening, the rotatable valve sealing body having a bore for alignment with the lumen formed between the flexible tubing opening and the hose receiving end, the bore having a tip receiving opening and a hose receiving opening.

AB STRACT Fluid flow control devices and related systems and methods may include a body or housing and a plug at least partially positioned in the body or housing to define a flow path. In a position of the plug, the plug and the body or housing may collectively define a fluid flow path.

A valve for use in oil and gas production or similar applications includes a plug or other flow barrier disposed in a cavity of a hollow valve body with a metal-to-metal sealing surface that is not reliant on any rubberized or elastomeric material to effect a seal.