In some examples, a valve flexure for a flow control valve is provided. An example valve flexure comprises a first diaphragm; a second diaphragm, the second diaphragm directly or indirectly connected to the first diaphragm about a peripheral portion of the valve flexure, the connected first and second diaphragms enclosing an inner volume of the valve flexure; and a heat transfer medium disposed within the inner volume of the valve flexure.

An internally cooled inlet or outlet valve for internal combustion engines, has a valve disc, a valve stem and a cavity inside the valve stem and the valve disc. A coolant is arranged in the cavity, wherein the cavity is provided with at least one guide vane for the coolant.

A directional valve having a valve housing having a primary port and at least one first and one second secondary port and a rotary piece arranged in the valve housing, which is penetrated by a channel and is rotatable about a rotation axis in order to adjust the directional valve between at least first and second switching positions. A first end of the channel is concentric to the axis. The rotary piece has an outer surface which is curved in a spherical cap-shaped manner, at which the second end of the channel opens. The valve housing has an inner surface which is curved in a spherical cap-shaped manner, at which inner surface secondary connection channels of the secondary connections open, and which is opposite the curve outer surface of the rotary piece. The curved outer surface of the rotary piece and the curved inner surface of the valve housing extend at most over the extent of a hemisphere.

A fluororesin diaphragm valve includes a valve portion, a sealing mechanism and an adjusting mechanism for the opening degree of the valve. The valve portion includes a valve body, a valve shaft, and a valve upper cover. The valve body includes a square portion, an annular portion, and a valve chamber. The sealing mechanism includes a diaphragm, an upper valve body, a tightening ring and an annular portion of the valve body. The adjusting mechanism is installed on the top of the valve upper cover. The sealing mechanism is installed in the annular portion and at the minimum diameter area of the annular portion, having annular lattice-shaped ribbed plates with horizontal openings to increase the structural strength of the diaphragm seal and improve the heat dissipation effect.

A high-temperature quick-opening spherical sealing shut-off valve that includes a valve body, a valve seat, a valve cover, a valve clack, a valve rod, and a driving device for driving the valve rod to rotate. A friction-adjusting mechanism is mounted on the valve rod. The valve rod is arranged coaxially and connected to the valve clack. A gas outlet passage is formed in the valve body and the valve cover. The valve clack and valve seat are located in the path of the gas outlet passage. The valve seat is mounted in the valve body and has a first through hole communicating with the gas outlet passage. The valve clack has a second through hole corresponding to the first through hole. The gas outlet passage has three states: open when the first hole fully overlaps the second hole, half-open when the holes partially overlap, and closed when no overlap.

Purge apparatus for use with fluid valves are disclosed. An apparatus includes a stem for a fluid valve. The stem has a first channel extending therethrough to receive a fluid. The apparatus also includes an aperture in fluid communication with the first channel and disposed on an outer surface of the stem or a fluid flow control member coupled to the stem. The aperture is to exhaust the fluid from the first channel toward one or more components of the fluid valve to remove residue.

A method for the production for a semi-finished valve product (4), includes casting, forging, deep-drawing, pressing and/or drop-welding of one or several metal material into a semi-finished valve product (4) that corresponds to a circle segment of a valve cut open in the axial direction. A valve is produced by welding together at least two semi-finished valve products (4) into an internally cooled valve, with the weld running in the axial direction of the valve.

A poppet valve (2) with a valve body (4) has a cavity (6), a coolant inlet port (8). A coolant outlet port (10). The coolant inlet port (8) and the coolant outlet port (10) are arranged on a valve stem (12) of the poppet valve (2). The cavity (6) extends into the valve stem (12) of the poppet valve (2) and into a valve head (14) of the poppet valve (2), wherein there is provided a coolant conducting element (16) within the cavity (6) and extending into the cavity (6) from the valve head (14) to the valve stem (12), where the coolant conducting element (16) in each case has a cross-section. The coolant conducting element (16) includes a pipe section (18) and a funnel section (20), and the coolant conducting element (16) extends concentrically to the poppet valve (2) in the cavity (6) of the poppet valve (2).

A valve includes a valve housing (2) for transport of a heatable fluid such as hydraulic oil. The valve housing has at least one utility connection (A, B), at least one pressure supply connection (P), and at least one return connection (T1, T2). A control slide (6) is guided in the valve housing (2) in a longitudinally displaceable manner. In at least one position of the control slide (6), the pressure supply connection (P) is at least partially separated from the utility connection (A, B), and the heatable fluid arrives, proceeding from this pressure supply connection (P) and via a heat-emitting connection in the control slide (6), at the at least one return connection (TI, T2) as a loss volume flow. The loss volume flow serves as a heat source and heats at least regions of the control slide (6).

Heat tracing systems and related methods are disclosed. An example valve includes a valve body defining a fluid flow passageway between a primary inlet and a primary outlet. The body valve has a first face adjacent the main inlet, the first face including a first groove. A first cover is positioned over the first groove to define a first heat tracing path. A secondary inlet is formed in the valve body and fluidly coupled to the first heat tracing path. A secondary outlet formed in the valve body and fluidly coupled to the first heat tracing path.