Disclosed is a valve for use in particulate material processing. The valve has a rotatable closure member having a convex sealing surface and a resilient sealing ring moveable between a first configuration in which the sealing ring forms a seal around a circumference of the convex sealing surface; and a second position in which a circumferential gap is defined between the convex sealing surface and the sealing ring. The valve body defines a fluid-directing surface extending around the fluid passage between the inlet and the sealing ring to define an annular clearance which tapers towards the sealing ring and becomes narrower than the annular gap. When there is a pressure drop across the valve and before the closure member is moved to fully open the valve, material flowing through the valve experiences a dynamic pressure rise towards the circumferential gap, decreasing flow velocity and wear.

A ball valve for use in a hydraulic supply system is described. The ball valve includes a valve body defining a fluid passage including an inlet and an outlet, a ball having an opening therethough and having an open position and a closed position within the fluid passage and a normal operating range between the open position and the closed position, a manual valve operation mechanism, an input shaft connected to the manual valve operation mechanism, and a gearing assembly including an output shaft, the gearing assembly connected to the input shaft and the output shaft connected to the ball. Rotation of the manual valve operation mechanism causes rotation of the ball along a full operating range within the valve body and the gearing assembly includes a feedback mechanism that is actuated after the ball has rotated outside of the normal operating range.

A valve with a valve upper plate defining an inlet, a valve body defining an outlet, and a fluid passage. A closure member is disposed in the fluid passage between the inlet and the outlet and has a convex sealing surface and is rotatable between a closed position in which the closure member extends across the fluid passage with the convex sealing surface oriented towards the inlet and an open position in which fluid is able to flow through the fluid passage from the inlet to the outlet. A resilient sealing ring, when the closure member is in the closed position, is moveable between a first configuration in which the sealing ring forms a seal around a circumference of the convex sealing surface and a second configuration in which the valve comprises a circumferential gap between the convex sealing surface and the sealing ring.

Disclosed is ball valve with automatic safety exhaust function, which is suitable for working environments in high pressure applications, such as up to 600 psi of water, oil, and gas. The ball valve includes a valve body, cap, ball with a vent hole, stem, a built-in vent needle valve, and seals. When the valve is in the closed position, the built-in needle valve is in the open state. The downstream gas enters the bottom of the valve cavity from the exhaust hole on the ball and exits the valve body through the needle valve hole. When the ball valve is in the open position, the built-in needle valve is in the closed state. The built-in needle valve design ensures that under high-pressure use (open state), the gas will not leak out of the valve body.

A housing has a housing main body and an outlet port. The housing main body includes a cylindrical housing inner wall that defines an internal space therein. The outlet port fluidly connects the internal space and an outside of the housing main body to each other. The valve has a valve body rotatable about an rotation axis along a rotation axis of the cylindrical housing inner wall. The valve is configured to selectively open and close the outlet port depending on a rotation position of the valve. The housing inner wall is formed such that a distance between the housing inner wall and the axis of the housing inner wall varies in a circumferential direction.

A valve seat is provided for use in a rotary valve for use in highly corrosive and abrasive applications. The valve seat includes a seat body adapted to selectively engage a portion of the floating ball element. The valve seat also includes a sealing element disposed in a first groove formed in the seat body and adapted to prevent fluid flow between the seat body and the valve body. The valve seat further includes a first bearing disposed in a second groove formed in the seat body, and a second bearing disposed in a third groove formed in the seat body, wherein the second and third grooves are formed immediately adjacent the first groove such that the first and second bearings are disposed immediately adjacent the sealing element.

An air release structure of an integrated flow control mechanism includes a flow control housing, a radiator nipple provided on an upper portion of the flow control housing and forming a bypass passage portion together with the flow control housing, a float provided in the bypass passage portion and an elastic member to support the float elastically and to selectively open the bypass passage portion.

Systems and methods are disclosed that include providing a valve suitable for maintaining a seal and preventing fluid flow through the valve at cryogenic temperatures. The valve includes a valve body having a longitudinal axis along a flow path through the valve, a ball selectively rotatable within the valve body to selectively allow fluid flow through the valve, a seat formed within the valve body and comprising a cavity having an angled wall, and a seat insert at least partially disposed within the cavity and having a first sealing surface that forms a first sealing interface with the ball to prevent leakage through a first leakage path and a second sealing surface that forms a second sealing interface with the angled wall to prevent leakage through a second leakage path when the ball valve is selectively rotated to prevent fluid flow through the valve.

A non-pressure relieving ball valve that includes: a stem connected to a handle regulating flow of pressurized fluid entering in the ball valve, a ball coupled to the stem and configured to control flow of the pressurized fluid through the ball valve, a seat abutting the ball to retain the in place, a sealing gasket provided in the ball valve and configured to restrict the flow of the pressurized fluid through the ball valve when the ball valve is in a closed position, and a slotted ring configured to be fitted in the ball valve between the seat and the sealing gasket. The slotted ring is adapted to permit ingress of pressurized fluid in slots defined on the slotted ring to enable balancing of fluid pressures on either side of the seat.

A valve assembly includes a valve body and a valve member extending through at least a portion of the valve body. The valve assembly also includes a seat pocket forming an annular recess in the valve body and a seat arrangement positioned at least partially within the seat pocket. The seat arrangement includes a lower seat extending radially inward from the annular recess toward the valve cavity axis. The seat arrangement also includes an upper seat at least partially overlapping the lower seat, the upper seat extending radially inward toward the valve cavity axis to contact the valve member along a seat face. The seat arrangement further includes an interface seal positioned along an interface between the upper seat and the lower seat, the interface seal receiving a fluid pressure to drive the lower seat radially outward and into the annular recess.