A check valve for a solenoid valve inclues a check valve seat that is arranged on an edge of a fluid passage and a movable closing element configured to execute a direction-oriented throughflow and sealing function. The closing element includes a sealing cone, a contact foot with a plurality of outflow grooves formed on the edge, and an elastic sealing ring that is arranged between the contact foot and the sealing cone. The outflow grooves form in each case a seating edge for the elastic sealing ring during sealing. The outflow grooves are configured in each case with an arcuate seating edge, which has a predetermined arc length, so that a circle segment of the elastic sealing ring, with an opening angle in the region of 40° to 120°, butts against the respective seating edge during sealing. A solenoid valve includes the check valve.

The present invention discloses a fluid control structure of a dispensing apparatus, comprising: a dispensing unit, a fluid supply unit, and a control unit. The present invention is characterized by its dispensing apparatus which includes a needle head, a thimble, and a valve body, wherein the valve body is provided with an accommodating space for accommodating the needle head and the thimble. The needle head is being formed a hollow space, and the space is tapered towards the direction of a nozzle, the nozzle disposed at one end of the needle head; the thimble is moved up and down along the valve body, having the same tapered as the inner diameter of the needle head. The fluid control structure of the dispensing apparatus of the present invention is to solve the shortcoming of prior art that the residual pressure in the dispensing process cause the fluid being dropped or leaked on the dispensing surface.

The valve member according to one embodiment of the present disclosure is a resin formed product having a crosslinked ethylene-tetrafluoroethylene copolymer as a main component, and having a crosslinking density of 85.0 mol/m.sup.3 or more calculated from a storage modulus at 300° C.

Embodiments of the present disclosure relate to a choke valve that includes a choke body, a choke trim disposed in the choke body, where the choke trim is configured to adjust a cross-sectional area of a flow path in the choke body to adjust a fluid flow through the choke valve, a needle of the choke trim disposed in the flow path of the fluid flow, where the needle includes a first portion having a superhard material, a seat of the choke trim, where the needle is configured to move along an axis extending through an opening of the seat to adjust the fluid flow through the choke valve.

A regulator valve assembly is provided for use in connection with high pressure fluid systems. The regulator valve assembly includes a valve pin having an engagement portion with a tapered surface and a valve seat having a valve pin receiving aperture defining a tapered surface on the valve seat to sealingly mate with the engagement portion of the valve pin. At least one of the valve pin and the valve seat includes an asymmetrical surface feature sized and shaped such that, when the valve pin is displaced away from the seated configuration and fluid flows through an annular space created between the engagement portion of the valve pin and the valve seat, unbalanced hydrodynamic forces arise from an interaction of the fluid with the asymmetrical surface feature. Systems incorporating the regulator valve assembly are also provided.

A heat exchanger valve includes a housing (2) having an inlet, an outlet a valve seat (5) on a valve seat member (24) between inlet and outlet, a valve element cooperating with the valve seat (5) and having a valve element axis, and presetting mechanism having a bushing (9) which is rotatable around the valve element axis and has an opening arrangement cooperating with a counter passage in the housing (2), wherein in the region of the opening arrangement the bushing (9) has a conical form cooperating with a conical counter face (13) and a distance is provided between the bushing (9) and the valve seat member (24). Such a heat exchanger valve should allow a precise pre-setting over a large range. To this end the bushing (9) has at least two notches (14) in an edge (10) facing the valve element member (24), each of the notches (14) forming an opening (25).

A proportioning valve for a reverse osmosis system that controls the production of product water by the differential pressure across the purification membrane. By sensing increasing tank pressure to actuate the proportioning valve, the flow of waste water is restricted. Placement of seals within the cavity of the valve, as well as placement of waste water inlet and outlet ports, protects tension components that provide reverse tank pressure from waste water exposure. A needle valve assembly responsive to an actuating assembly that senses tank pressure removes the need for an inlet tank water port while restricting water flow.

A plug for a fluid valve has a stem extending along an axis between a first end and a second end, a tip secured to the first end of the stem, a plug body mounted to the stem toward the second end relative to the tip, and a valve seat between the tip and the plug body. The valve seat has a sealing surface that extends past an outer perimeter of the tip and is sized to engage a valve ring of the fluid valve, the valve seat defining an annular space that permits radial movement of the valve ring relative to the axis of the stem to align with the valve ring as pressure is applied to the valve seat.

A regulator valve assembly is provided for use in connection with high pressure fluid systems. The regulator valve assembly includes a valve pin having an engagement portion with a tapered surface and a valve seat having a valve pin receiving aperture defining a tapered surface on the valve seat to sealingly mate with the engagement portion of the valve pin. At least one of the valve pin and the valve seat includes an asymmetrical surface feature sized and shaped such that, when the valve pin is displaced away from the seated configuration and fluid flows through an annular space created between the engagement portion of the valve pin and the valve seat, unbalanced hydrodynamic forces arise from an interaction of the fluid with the asymmetrical surface feature. Systems incorporating the regulator valve assembly are also provided.

The invention concerns a thermostatic valve (1) comprising a closed hollow body (2), a first opening leading into the hollow body (2), referred to as the inlet opening (4), a second opening leading into the hollow body (2), referred to as the main outlet (5), a third opening, substantially perpendicular to the second opening, leading into the hollow body (2), referred to as the bypass outlet (7), and a seal (11) allowing the inlet opening (4) to be alternately separated from the main outlet (5) or the bypass outlet (7). The seal (11) comprises a thermostatic actuator (12) and a skirt (13) which is made of plastic material and has at least one window (19) suitable for being traversed by a fluid, the skirt (13) being capable of sliding in the hollow body (2), along an axis that substantially coincides with the axis of the thermostatic actuator (12), between a first position in which the skirt (13) seals the main outlet (5), such that the fluid flows between the inlet opening (4) and the bypass outlet (7), and a second position in which the skirt (13) leaves the main outlet (5) open and seals the bypass outlet (7), such that the fluid from the inlet opening (4) can pass through the window (19) and flow through the main outlet (5).