A valve system comprising a valve chamber at a junction of an inlet port, an outlet port and a bypass port, the inlet port configured for fluid communication with exhaust gas, the outlet port configured for fluid communication with an inlet of a turbine, and the bypass port configured for fluid communication with an exhaust aftertreatment device; a rotary valve comprising a valve rotor which rotates about a valve axis within the valve chamber between a first position to permit gas flow through the bypass port and a second position to block gas flow. At least one of the valve rotor and the valve chamber comprises a protrusion and the other comprises a recess, wherein, in the first position, the protrusion and recess are spaced from one another, and, in the second position the recess receives the protrusion such that gas flow between the protrusion and recess is substantially prevented.

A valve system comprising a valve chamber at a junction of an inlet port, an outlet port and a bypass port, the inlet port configured for fluid communication with exhaust gas, the outlet port configured for fluid communication with an inlet of a turbine, and the bypass port configured for fluid communication with an exhaust aftertreatment device; a rotary valve comprising a valve rotor which rotates about a valve axis within the valve chamber between a first position to permit gas flow through the bypass port and a second position to block gas flow. At least one of the valve rotor and the valve chamber comprises a protrusion and the other comprises a recess, wherein, in the first position, the protrusion and recess are spaced from one another, and, in the second position the recess receives the protrusion such that gas flow between the protrusion and recess is substantially prevented.

A valve for use in oil and gas production or similar applications includes a ball disposed in a cavity of a hollow valve body with a metal-to-metal sealing surface that is not reliant on any rubberized or elastomeric material to effect a seal.

A trunnion ball valve provides a reliable seal when closed, while minimizing or eliminating frictional resistance during rotation of the ball. A pressurization chamber behind the upstream valve seat can be interconnected by one or more pressurization valves with either the upstream or the downstream process fluid. The interconnection can be via a single 3-way valve. When the valve is closed and the ball is fixed in orientation, the pressurization chamber is automatically connected to the upstream process fluid, thereby pressing the seat against the ball and ensuring a reliable seal. While the ball is being rotated, the pressurization chamber is automatically connected to the downstream process fluid, thereby substantially eliminating valve seat friction. Connection to the downstream process fluid can include connection to a small space in front of the upstream seat. An electronic controller can control both valve stem rotation and the pressurization valves.

A control valve 8 according to the present disclosure includes a casing 21 in which an outlet for a liquid is formed and the liquid is accommodated, a rotor 22 rotatably accommodated in the casing 21 and having a communication port communicating with the outlet, and a sliding ring 131 having a sliding surface 141a sliding on an outer surface of the rotor in a state of being disposed inside the outlet and causing the outlet and the communication port to communicate with each other according to a rotation position of the rotor 22, in which a liquid holding portion for holding the liquid between the sliding surface 141a and the liquid holding portion is provided on the outer surface of the rotor 22, and the liquid holding portion has a recessed portion for accommodating the liquid.

A ball valve system includes a body having an upstream end and a downstream end and a ball within the body between the upstream end and the downstream end, the ball being rotatable about a vertical axis to move between a closed position and an open position. The ball valve assembly includes a stem movable in an actuation direction substantially parallel to the vertical axis, the stem including a recess at a proximal portion of the stem, a guiding member extending within the recess of the stem, the guiding member being configured to prevent rotation of the stem or cause rotation of the stem, and a lubrication port in fluid communication with the recess.

This invention relates to a valve comprising: —a body with a first port, a second port and an interior space extending between the first and second port; —a seat arranged in the interior space; —a valve member moveably arranged inside the interior space to cooperate with the seat; and —a stem to move the valve member, wherein the stem is rotatable between a first rotational position and a third rotational position with a second rotational position in between the first and third rotational position, wherein in between the first and second rotational position the valve member and the stem are coupled according to a first configuration, and wherein in between the second and third rotational position, the valve member and the stem are coupled according to a second configuration different from the first configuration.

A ball valve including a ball defining a bore therein, and a trunnion arm articulated with the ball via a trunnion, the trunnion arm disposed on a resilient member allowing resilient movement of the trunnion arm pursuant to load on the ball.

Coolant valve for a vehicle includes a housing having a plurality of coolant ports, a valve element arranged in an adjustable manner in the housing in order to connect or disconnect coolant ports, and at least one seal arrangement. The seal arrangement bears in a sealing manner against the housing on one side and in a sealing manner against the valve element on the other side, the seal arrangement having a carrier element made of a first material and a sealing element made of a second material, the second material being softer than the first material. The sealing element has a first sealing lip bearing against the valve element and the carrier element having a supporting portion. The first sealing lip protrudes beyond the supporting portion with a free end, and the first sealing lip is pressed against the supporting portion when coolant flows through the coolant valve.

A control valve assembly includes a valve body defining an inlet, an outlet and a fluid flow pathway therebetween. A ball valve is positioned within the fluid flow pathway and includes a rotatable ball having an inlet opening, an outlet opening and a flow pathway therebetween, an upstream seat ring positioned at an inlet side of the ball, and a downstream seat ring positioned at a downstream side of the ball, the seat rings being configured to substantially seal off fluid flow between upstream and downstream sides of the ball except through the ball fluid flow pathway. At least one of the upstream and downstream seat rings is a dynamic sealing seat ring. A retainer ring is positioned between the dynamic sealing seat ring and a portion of the rotatable ball to substantially prevent deformation of a portion of the dynamic sealing seat ring in a direction toward the ball.