The invention relates to a mechanical seal arrangement comprising a slide ring seal (2) having a rotating slide ring (3) and a stationary slide ring (4) defining a sealing gap (5) therebetween, the rotating slide ring (3) having a first slide surface (30) with a first information structure (6), the stationary slide ring (4) having a second slide surface (40) with a second information structure (7) wherein the first information structure (6) and the second information structure (7) at least partially overlap in an overlap area (16), at least one sensor (8) for detecting sound and/or vibration, wherein the sound and/or the vibration is generated by the first information structure (6) when moving past the second information structure (7), and an evaluation unit (10), which is arranged to compare the sound and/or the vibrations detected with set values and to output a comparison result, characterized in that the second information structure (7) has a second sliding surface (40) with a second information structure (7), wherein the first information structure (6) and the second information structure (7) at least partially overlap in an overlap area (16).

An apparatus for sealing such a gap may be a plunger seal which may include a flap arm comprising resilient sheets and a wall arm comprising resilient sheets. A proximal end portion of the flap arm may include a closeout seal coupled to the flap. A proximal end portion of the wall arm may include a plunger having a geometry corresponding to that of the closeout seal so the plunger may be matingly received by the closeout seal. When positioned in a gap, the plunger seal may exert a force to urge the flap arm towards the flap and to urge the wall arm and resilient sheet towards the structure to seal the gap.

Spring energized seal assemblies each with one or two sealing elements and a canted coil spring located in a spring cavity of the sealing element or of the two sealing elements to bias an inner flange and an outer flange of the respective spring cavity away from one another. The canted coil springs can have un-conventional coil shapes with one or more straight coil segments and/or with curved connecting ends. The coils can have dimples to provide multiple biasing points. The coils can have loops. The canted coil springs with un-conventional coil shapes can be used to improve spring loading on a sealing element.

A sealing device includes: a housing; a seal ring configured to be axially displaceably inserted along an inner circumference of the housing, the seal ring including a front-end surface and a rear-end surface which defines packing mounting space; a packing configured to establish sealing between the housing and the seal ring, the packing being disposed in the packing mounting space; and spring means disposed on the rear-end surface side of the seal ring to elastically bias the seal ring toward the front-end surface side.

A seal arrangement for a fluid valve includes: a first seal for sealing abutment against a pivotably adjustable valve body of the fluid valve; a second seal for sealing abutment against a valve housing of the fluid valve; and a separate, elastically deformable intermediate piece arranged between a first wall of the first seal and a second wall of the second seal. The intermediate piece has at least one axial section whose cross section has, in relation to the seal opening, a first, radially outer lateral surface and an opposite, second, radially inner lateral surface, and the radially outer lateral surface is at least sectionally concave, and the radially inner lateral surface is at least sectionally convex.

Object

To provide a liquid contact member having high hydrophilicity and exhibiting high dirt removal efficiency by cleaning.

Solution

A liquid contact member includes a ceramic including a plurality of crystal grains and a grain boundary phase, and the concentration of silicon on a liquid contact surface of the ceramic is higher than that of silicon on a virtual internal surface parallel to the liquid contact surface.

Object

To provide a liquid contact member having high hydrophilicity and exhibiting high dirt removal efficiency by cleaning.

Solution

A liquid contact member includes a ceramic including a plurality of crystal grains and a grain boundary phase, and the concentration of silicon on a liquid contact surface of the ceramic is higher than that of silicon on a virtual internal surface parallel to the liquid contact surface.

An apparatus has: a first member; a shaft rotatable relative to the first member about an axis; and a seal system. The seal system has: a seal carried by the first member and having a seal face; a seal housing; a seat carried by the shaft and having a seat face in sliding sealing engagement with the seal face; and a plurality of coil springs biasing the seal face against the seat face, each coil spring having a first end and a second end. The seal has a plurality of spring compartments. Each of the plurality of coil springs is partially within a respective associated compartment of the plurality of spring compartments.

A sealing ring includes a first sealing element having a first mating surface and a second sealing element having a second mating surface. A high-pressure boundary extends across at least a portion of the first sealing element and across at least a portion of the second sealing element, and a low-pressure boundary extends across at least a portion of the first sealing element and across at least a portion of the second sealing element. The first mating surface, the second mating surface, or both, includes a recess open to the low-pressure boundary and not open to the high-pressure boundary. The recess may include a groove, for example. The first mating surface is sealed against the second mating surface by a first force acting on the first sealing element and a second force acting on the second sealing element. These forces act to pressure-lock the assembly.

Provided is a seal ring configured so that stable lubrication performance can be provided across a wide range of rotation speed. A seal ring for sealing a clearance between a rotary shaft and a housing includes multiple static pressure grooves provided at a sliding surface of the seal ring and arranged in a circumferential direction, the static pressure grooves being opened on a sealed fluid side and closed on an outer diameter side, a circumferential length of each of the static pressure grooves being shorter than a radial length of each of the static pressure grooves.