Abstract: An inflatable seal includes an annular body made of elastic material. The inflatable seal includes a chamber disposed in the annular body. The inflatable seal includes a fixing end and a movable end opposite to the fixing end in a cross section. The inflatable seal further includes first and second sides interconnected between the fixing end and the movable end and opposite to each other. The fixing end includes an annular lining disposed in the annular body. The sealing ability of the inflatable seal is improved in the axial direction and the radial direction.

Abstract: An inflatable seal includes an annular body made of elastic material. The inflatable seal includes a chamber disposed in the annular body. The inflatable seal includes a fixing end and a movable end opposite to the fixing end in a cross section. The inflatable seal further includes first and second sides interconnected between the fixing end and the movable end and opposite to each other. The fixing end includes an annular lining disposed in the annular body. The sealing ability of the inflatable seal is improved in the axial direction and the radial direction.

Abstract: An elastomeric seal for a shaft includes a static sealing body having an outer annular surface to be engaged at a shaft hole in a housing. A radially-dynamic sealing ring is provided on an inner annular surface of the static sealing body for contacting an outer surface of the shaft. First and second dynamic sealing lips extend from an outer end surface of the static sealing body and contact a shoulder part formed at the outer surface of the shaft. The radially-dynamic sealing ring and the first dynamic sealing lip constitute a first sealing space in between. The first and second dynamic sealing lips constitute a second sealing space in between. The first and second sealing spaces help the radially-dynamic sealing ring and the first dynamic sealing lip to sustain fluid pressures inside the housing of the mechanical component for reduction of deformations.

Abstract: A filler assembly is mounted in an axial hole of a cap of a valve. The filler assembly includes at least one first filler and at least one second filler stacked in a longitudinal direction. A valve rod received in the axial hole extends through the at least one first filler and the at least one second filler. At least one of two mutually abutting faces respectively of the at least one first filler and the at least one second filler is at a non-parallel angle to a radial direction perpendicular to the longitudinal direction. If one of the at least one first filler and the at least one second filler is subjected to a pressing force in the longitudinal direction, at least one of the at least one first filler and the at least one second filler is moved in the radial direction to press against the valve rod.

Abstract: A valve includes a plug mounted to a lower end of a valve rod for opening or closing a fluid passage in the body. The valve rod extends through a cap and a stretchable jacket. The stretchable jacket includes first and second ends and a deformation section between the first and second ends. The first end of the stretchable jacket is fixed to the cap. The second end of the stretchable jacket is fixed to the valve rod. A stop is located at the deformation section, dividing the stretchable jacket into first and second stretchable sections. A pull rod is fixed to the valve rod or the cap and slideable relative to the stop. First and second positioning members are mounted on the pull rod to limit travel of the pull rod by contacting with the stop, avoiding over stretching and undesired compression of the first or second stretchable section.

Abstract: A valve includes a plug mounted to a lower end of a valve rod extending into a chamber in a top portion of a body and in communication with a fluid passage of the body. The valve rod extends through a cap mounted to the top portion of the body. A bottom portion of a top cover is mounted to a top end of the cap. A sleeve is received in a compartment in a top portion of the top cover and is threadedly engaged with an upper end of the valve rod. A hand wheel is mounted to the sleeve. A lower end of the sleeve extends through at least one bearing mounted in the compartment of the top cover. When the hand wheel is rotated, the sleeve is driven to move the valve rod and the plug to open or close the fluid passage.

Abstract: A valve includes a plug mounted to a lower end of a valve rod for opening or closing a fluid passage in the body. The valve rod extends through a cap and a stretchable jacket. The stretchable jacket includes first and second ends and a deformation section between the first and second ends. The first end of the stretchable jacket is fixed to the cap. The second end of the stretchable jacket is fixed to the valve rod. A stop is located at the deformation section, dividing the stretchable jacket into first and second stretchable sections. A pull rod is fixed to the valve rod or the cap and slideable relative to the stop. First and second positioning members are mounted on the pull rod to limit travel of the pull rod by contacting with the stop, avoiding over stretching and undesired compression of the first or second stretchable section.

Abstract: A valve includes a plug mounted to a lower end of a valve rod extending into a chamber in a top portion of a body and in communication with a fluid passage of the body. The valve rod extends through a cap mounted to the top portion of the body. A bottom portion of a top cover is mounted to a top end of the cap. A sleeve is received in a compartment in a top portion of the top cover and is threadedly engaged with an upper end of the valve rod. A hand wheel is mounted to the sleeve. A lower end of the sleeve extends through at least one bearing mounted in the compartment of the top cover. When the hand wheel is rotated, the sleeve is driven to move the valve rod and the plug to open or close the fluid passage.

Abstract: A filler assembly is mounted in an axial hole of a cap of a valve. The filler assembly includes at least one first filler and at least one second filler stacked in a longitudinal direction. A valve rod received in the axial hole extends through the at least one first filler and the at least one second filler. At least one of two mutually abutting faces respectively of the at least one first filler and the at least one second filler is at a non-parallel angle to a radial direction perpendicular to the longitudinal direction. If one of the at least one first filler and the at least one second filler is subjected to a pressing force in the longitudinal direction, at least one of the at least one first filler and the at least one second filler is moved in the radial direction to press against the valve rod.