A valve is provided, the valve including a housing; and a valve element, the housing comprising a cylindrical bore defining an axial direction and an annular shoulder extending into the cylindrical bore, wherein the valve element is axially moveable within the cylindrical bore so as to move the valve element between a closed position in which the valve element engages with the annular shoulder and an open position in which the valve element is spaced from the annular shoulder, wherein, in the open position, fluid flowing into the valve in a first axial direction may flow through one or more apertures provided in the valve element and through the valve, wherein the valve element and the annular shoulder are configured to be in continuous contact along an annular contact surface when in the closed position so as to seal against fluid flow through the valve.

A valve is provided, the valve including a housing; and a valve element, the housing comprising a cylindrical bore defining an axial direction and an annular shoulder extending into the cylindrical bore, wherein the valve element is axially moveable within the cylindrical bore so as to move the valve element between a closed position in which the valve element engages with the annular shoulder and an open position in which the valve element is spaced from the annular shoulder, wherein, in the open position, fluid flowing into the valve in a first axial direction may flow through one or more apertures provided in the valve element and through the valve, wherein the valve element and the annular shoulder are configured to be in continuous contact along an annular contact surface when in the closed position so as to seal against fluid flow through the valve.

A method of preparing an engine valve is provided. The method includes hot forging a heat resistant steel at 1,150 to 1,250° C. to mold a valve, aging the molded valve and hollowed-out processing the aging valve. Additionally, the method includes nitride-heating the hollow valve and grinding a surface of a neck of the nitride-heated valve to remove a nitride layer.

A method of preparing an engine valve is provided. The method includes hot forging a heat resistant steel at 1,150 to 1,250° C. to mold a valve, aging the molded valve and hollowed-out processing the aging valve. Additionally, the method includes nitride-heating the hollow valve and grinding a surface of a neck of the nitride-heated valve to remove a nitride layer.

The present invention generally relates to assembly equipment of valve body, especially to riveting and grinding assembly for nozzle of screw shaft valve. The invention may include a rack, a power control box, a turntable and a turntable divider. A carrier assembly which engages with the screw shaft valve body is installed on the edge of the turntable with uniform distribution. On the center part of the turntable, a support shaft which is installed on and fixed with the rack is vertically interposed and on the top of the support shaft, an upper supporting disc is installed. A valve pipe feeding device, a valve pipe preloading device, a valve pipe riveting device and a valve pipe grinding device which engage with the carrier assembly are installed on the said rack on the rotational direction of turntable. As the threaded pipe is put into the carrier assembly by valve pipe feeding device, the carrier assembly rotates counterclockwise along the turntable and rotates to the valve pipe feeding device to the press threaded pipe into the valve seat. Thereafter the carrier assembly rotates the valve pipe riveting device and rivets threaded pipe with a valve flange in order to finish assembling process. Finally, the carrier assembly rotates the valve pipe grinding device to grind nozzle of valve to finish grinding and riveting process of threaded pipe with high positioning accuracy of assembly and marvelous hermetic sealing.

The present invention belongs to the technical field of polishing machinery, and particularly relates to a full-automatic polishing machine aiming at the valve core head of a snort valve. The full-automatic polishing machine comprises a base, and a material taking device, a fixture and a polishing device which are provided on the base, wherein the material taking device comprises mechanical arms, and a first driving mechanism for driving the mechanical arms to move in transverse and vertical directions; and the polishing device comprises a grinding wheel, a second driving mechanism for driving the grinding wheel to rotate, and a third driving mechanism for driving the grinding wheel to move in longitudinal and vertical directions. By adopting the full-automatic polishing machine, automatic polishing of the valve core head of the snort valve is realized, plenty of manpower is saved, the working efficiency is improved, and a polished product is unified in quality, and thus being favorable for the large-scale production and export of the valve core heads.

A valve seat processing machine configured to process a valve seat in a valve device including a valve body portion which forms a flow passage of fluid and a valve drive portion which drives a valve element capable of tightly engaging with the valve seat includes: a base portion attached to the valve body portion; a main body portion movable relative to the base portion; a support portion movable relative to the main body portion in a drive direction of the valve element; a main spindle rotatable relative to the support portion about an axis parallel to the drive direction of the valve element; a tool holder configured to hold a tool for processing the valve seat and movable relative to the main spindle in a direction intersecting the drive direction of the valve element; and a controller configured to control movement of the support portion and the tool holder.

A valve seat processing machine configured to process a valve seat in a valve device including a valve body portion which forms a flow passage of fluid and a valve drive portion which drives a valve element capable of tightly engaging with the valve seat includes: a base portion attached to the valve body portion; a main body portion movable relative to the base portion; a support portion movable relative to the main body portion in a drive direction of the valve element; a main spindle rotatable relative to the support portion about an axis parallel to the drive direction of the valve element; a tool holder configured to hold a tool for processing the valve seat and movable relative to the main spindle in a direction intersecting the drive direction of the valve element; and a controller configured to control movement of the support portion and the tool holder.

A valve seat processing machine (1) configured to process a valve seat (118) in a valve device (101) including a valve body portion (110) which forms a flow passage of fluid and a valve drive portion (120) which drives a valve element (124) capable of tightly engaging with the valve seat (118) in the valve body portion (110) includes: a base portion (10) attached to the valve body portion (110); a main body portion (20) movable relative to the base portion (10) in two different axial directions; a support portion (30) movable relative to the main body portion (20) in a drive direction of the valve element (124); a main spindle (40) rotatable relative to the support portion (30) about an axis parallel to the drive direction of the valve element (124); and a tool holder (50) configured to hold a tool (T) for processing the valve seat (118).

A valve seat processing machine (1) configured to process a valve seat (118) in a valve device (101) including a valve body portion (110) which forms a flow passage of fluid and a valve drive portion (120) which drives a valve element (124) capable of tightly engaging with the valve seat (118) in the valve body portion (110) includes: a base portion (10) attached to the valve body portion (110); a main body portion (20) movable relative to the base portion (10) in two different axial directions; a support portion (30) movable relative to the main body portion (20) in a drive direction of the valve element (124); a main spindle (40) rotatable relative to the support portion (30) about an axis parallel to the drive direction of the valve element (124); and a tool holder (50) configured to hold a tool (T) for processing the valve seat (118).