A flap-gate valve having a replaceable wear surface, methods of replacing a wear surface with a replacement wear surface, and methods of retrofitting an existing flap-gate valve with components adapted to work in conjunction with a replaceable wear surface.

A flap-gate valve having a replaceable wear surface, methods of replacing a wear surface with a replacement wear surface, and methods of retrofitting an existing flap-gate valve with components adapted to work in conjunction with a replaceable wear surface.

A valve including two component parts, with a first part being rotationally mounted to the second part, wherein a through passage is provided in each part and the passages are in fluid communication when the parts are rotated into an open position, to allow flow 5 through the valve, wherein each part has a threaded socket and a threaded male connector, and wherein the passage extends axially, through the male connector and opens into the socket.

A valve including two component parts, with a first part being rotationally mounted to the second part, wherein a through passage is provided in each part and the passages are in fluid communication when the parts are rotated into an open position, to allow flow 5 through the valve, wherein each part has a threaded socket and a threaded male connector, and wherein the passage extends axially, through the male connector and opens into the socket.

A dust and abrasive materials gate valve with an angled valve seat and pivotably mounted valve gate allows for a broad seal area around the periphery of the valve seat, which may be closed tightly by a wedging action due to increasing force applied by the valve actuator. The valve seal is thus not formed along a single, linear surface as in traditional gate valves and the force applied by the valve gate to the seat facilitates closing even if there is wear along the sealing surfaces. Due to the relatively large open area around the periphery of the valve gate just before closing or immediately upon opening, the velocity of particles in pressurized systems is reduced and erosion reduced accordingly.

A valve for a liquid chromatography system comprises a stator; a rotor that rotates about a vertical axis relative to the stator, the rotor comprising a rotor body and a rotary shaft interface, the rotary shaft interface comprising a cavity along the vertical axis and an indentation at a bottom region of the cavity along the vertical axis; a platen in communication with a bottom surface of the rotor body, the platen having a conical feature along the vertical axis; and a ball bearing having a top portion positioned in the conical feature of the platen and a bottom portion positioned in the indentation of the rotary shaft interface allowing for pivoting of the platen relative to the vertical axis and for aligning a top surface of the rotor body to be parallel with a surface of the stator.

A valve for a liquid chromatography system comprises a stator; a rotor that rotates about a vertical axis relative to the stator, the rotor comprising a rotor body and a rotary shaft interface, the rotary shaft interface comprising a cavity along the vertical axis and an indentation at a bottom region of the cavity along the vertical axis; a platen in communication with a bottom surface of the rotor body, the platen having a conical feature along the vertical axis; and a ball bearing having a top portion positioned in the conical feature of the platen and a bottom portion positioned in the indentation of the rotary shaft interface allowing for pivoting of the platen relative to the vertical axis and for aligning a top surface of the rotor body to be parallel with a surface of the stator.

A bleed valve for a gas turbine engine compressor has a valve body and a flapper. The valve body defines a flow path and includes a flapper seat. The flow path extends through the valve body. The flapper is pivotally connected to the valve body and is movable between a closed position and an open position. In the closed position the flapper seats against the flapper seat and blocks the flow path. In the open position the flapper is angled towards the valve body inlet such that fluid moving through the valve body exerts force on the flapper, urging the flapper towards the closed position.

A bleed valve for a gas turbine engine compressor has a valve body and a flapper. The valve body defines a flow path and includes a flapper seat. The flow path extends through the valve body. The flapper is pivotally connected to the valve body and is movable between a closed position and an open position. In the closed position the flapper seats against the flapper seat and blocks the flow path. In the open position the flapper is angled towards the valve body inlet such that fluid moving through the valve body exerts force on the flapper, urging the flapper towards the closed position.

A valve comprises: a housing defining a chamber; a fluid outlet defined by a fluid outlet wall; and a first fluid outlet orifice and a second fluid outlet orifice comprising a rigid seat. The valve comprises a movable gate, that is flexible and/or compressible and impermeable. The moveable gate is more flexible than the rigid seat, has a planar surface, and is configured to slidably move in a first axis. The movable gate is configured to be positioned so that it is located between a fluid inlet orifice and the second fluid outlet orifice when the valve is in a closed position, wherein fluid pressure within the chamber causes the movable gate to seal the second fluid outlet orifice via the rigid seat, and not the fluid inlet orifice. The valve may employ gate shapes that generate and/or exploit Bernoulli effect forces when fluid passes though the valve.