A valve includes a housing and a rotary body arranged notably therein with a through opening for a fluid, wherein a flow path is shut off or is at least partially opened in accordance with the rotational angle position of the rotary body about an axis of rotation, wherein the rotary body is connected to a spindle by which the rotary body is rotatable, wherein the housing is provided with a covering, and wherein the spindle reaches through the covering. The spindle is dynamically sealed by a sealing device which follows movements of the spindle relative to the housing and/or to the covering.

A valve includes a housing and a rotary body arranged notably therein with a through opening for a fluid, wherein a flow path is shut off or is at least partially opened in accordance with the rotational angle position of the rotary body about an axis of rotation, wherein the rotary body is connected to a spindle by which the rotary body is rotatable, wherein the housing is provided with a covering, and wherein the spindle reaches through the covering. The spindle is dynamically sealed by a sealing device which follows movements of the spindle relative to the housing and/or to the covering.

A regulating valve that includes a valve stem for driving a valve body, and a gland portion slidably holding the valve stem, the gland portion including a lid portion having a through-hole communicating with the inside of the valve box, the valve stem being inserted into the through-hole, a spacer provided between the inner wall of the through-hole and the valve stem, one yarn packing disposed above the spacer, at least two adapter packings disposed via the yarn packing in a slide direction of the valve stem, the adapter packings being made of a material having a smaller thermal expansion coefficient and a higher hardness than the yarn packing, a packing follower disposed on the adapter packings opposite to the valve box, a disc spring disposed on the packing follower, and a packing flange disposed above the disc spring and the packing follower, the packing flange being fixed to the lid portion.

A valve seat includes a first end; a second end positioned opposite from the first end; and a body extending from the first end to the second end, the body defining an inner surface and an outer surface, the inner surface defining a main bore extending through the body from the first end to the second end, the main bore defining a main bore axis, the body defining a shaft bore extending from the inner surface to the outer surface, the shaft bore defining a shaft bore axis positioned perpendicular to the main bore axis, the shaft bore defining an inner shaft opening and an outer shaft opening, the body defining a concave seat bearing surface extending around the inner shaft opening.

A valve packing having independently loaded packing rings is disclosed. A packing assembly for a fluid valve includes a first packing ring, a first follower to be disposed at least partially within a bore of a bonnet of the fluid valve to apply a first load to the first packing ring, a second packing ring sized to fit within a bore of the first follower, and a second follower to be disposed at least partially within the bore of the first follower to apply a second load to the second packing ring within the bore of the first follower.

Bonnet and valve trim assembly and related methods are described. An example bonnet and valve trim assembly includes a bonnet structured to couple to a valve body via a valve body mounting flange, the bonnet including a cage mounting interface. A cage defining a body has a bonnet mounting interface to couple to the cage mounting interface of the bonnet. A retainer retains the cage mounting interface and the bonnet mounting interface to couple the cage and the bonnet. The retainer to enable axial movement between the cage and the bonnet when the retainer is coupled to the cage and the bonnet.

A non-curable injectable ester containing packing material for use in the repair of leaking valves contains a calcium sulfonate grease containing at least one polyalphaolefin, an ester, an anti-wear/anti-galling agent, a binding/thickening agent and a plasticizing agent.

A non-curable injectable ester containing packing material for use in the repair of leaking valves contains a calcium sulfonate grease containing at least one polyalphaolefin, an ester, an anti-wear/anti-galling agent, a binding/thickening agent and a plasticizing agent.

A piezoelectric element-driven valve 1 including a main body, a valve element, piezoelectric actuators, a plurality of cylindrical actuator boxes arranged in series, a cylindrical outer connecting jig detachably connecting the adjacent actuator boxes and having an opening for drawing out wiring, a plurality of piezoelectric actuators accommodated in the actuator box respectively in the same direction, and a cylindrical inner connecting jig slidably accommodated in the outer connecting jig and having an opening for positioning the adjacent piezoelectric actuators and drawing out wiring.

A pressure regulator includes a valve body having a fluid inlet and a fluid outlet connected by a fluid passageway. An orifice is disposed between the fluid inlet and the fluid outlet. A valve seat is disposed within the fluid passageway. A movable valve plug is disposed within the fluid passageway, and the valve plug interacts with the valve seat to selectively open or close the fluid passageway. A cage is disposed in the fluid passageway, the cage surrounds the valve plug, and the cage includes a mechanical stop that limits movement of the valve plug within the cage away from the valve seat.