A valve in which a backseat structure is formed at a height to easily prevent penetration of fluid with high accuracy from outside a bonnet to inhibit an increase in internal pressure. In a state in which a packing for sealing (5) is attached inside a bonnet (10) in a longneck structure, a stem (3) is axially inserted and a flow path (13) inside a valve box (2) is provided to be opened and closed by a valve body (4). The bonnet is divided into an upper bonnet (11) and a lower bonnet (12) at a position higher than a position at which a fluid flowing inside the valve box ascends in a liquid state. A backseat mechanism (42) has a fixed-side seal surface (21) formed on a lower end side of the upper bonnet and a movable-side seal surface (41) on an outer peripheral surface of the stem.

A method for producing at least one hollow valve for gas exchange may include introducing a bore into a valve shaft and into a valve head to form the at least one hollow valve, measuring a depth of the bore, washing the at least one hollow valve at least once, providing the at least one hollow valve in a retaining device, orienting the retaining device together with the at least one hollow valve with respect to an associated electrode, moving the associated electrode in relation to the at least one hollow valve, inserting the associated electrode into the bore of the at least one hollow valve, enlarging the bore in a region of the valve head by electromechanical machining processes, removing the associated electrode from the at least one hollow valve, rinsing and/or preserving the at least one hollow valve, and measuring a wall thickness of a valve bottom.

A method for producing at least one hollow valve for gas exchange may include introducing a bore into a valve shaft and into a valve head to form the at least one hollow valve, measuring a depth of the bore, washing the at least one hollow valve at least once, providing the at least one hollow valve in a retaining device, orienting the retaining device together with the at least one hollow valve with respect to an associated electrode, moving the associated electrode in relation to the at least one hollow valve, inserting the associated electrode into the bore of the at least one hollow valve, enlarging the bore in a region of the valve head by electromechanical machining processes, removing the associated electrode from the at least one hollow valve, rinsing and/or preserving the at least one hollow valve, and measuring a wall thickness of a valve bottom.

A valve and tool assembly includes a valve seat, a valve seat recess, a seat carrier and a valve seat displacement tool. A valve seat installation tool is also described, as well as a valve seat replacement kit and a method for replacing a valve seat. The valve may be a diaphragm valve, for example.

A safety isolation plug fitting for detecting pressurized fluid in a pipe may include a body defining an inlet adapted to be in fluid communication with the pipe, an outlet, and a passageway extending between the inlet and the outlet. A valve assembly may be seated in the passageway and movable between a closed position in which fluid communication between the inlet and the outlet is inhibited, and an open position in which a pressurized fluid in the pipe can flow between the inlet and the outlet. A flow deflector can be in fluid communication with said outlet that is configured to redirect at least a portion of the pressurized fluid exiting said outlet in direction away from a user.

A bonnet is pressed and fixed to a valve body using a pressing means of an attachment fixed to the valve body, and also a coupling means is released from coupling, and a work housing is attached to the attachment, the pressing means is released from pressing and fixing, the bonnet is taken out to an inside of a storage space of the work housing and is removed, and thereafter a short pipe that has an inner plug is attached to the valve body, the short pipe is pressed and fixed to the valve body using the pressing means of the attachment, the work housing is removed from the attachment, the short pipe and the valve body are coupled and fixed to each other in a sealed state using a second coupling means, and the attachment is removed from the valve body.

A bonnet is pressed and fixed to a valve body using a pressing means of an attachment fixed to the valve body, and also a coupling means is released from coupling, and a work housing is attached to the attachment, the pressing means is released from pressing and fixing, the bonnet is taken out to an inside of a storage space of the work housing and is removed, and thereafter a short pipe that has an inner plug is attached to the valve body, the short pipe is pressed and fixed to the valve body using the pressing means of the attachment, the work housing is removed from the attachment, the short pipe and the valve body are coupled and fixed to each other in a sealed state using a second coupling means, and the attachment is removed from the valve body.

This invention relates to an apparatus for adapting an existing pipeline. The apparatus includes a clamp portion adapted to fit around at least part of an existing pipeline in use and at least one neck or branch portion depending from the clamp portion, and a valve means.

In some implementations, an apparatus comprises a pipe, a stud that is forge-welded to the pipe, creating a forge-welded stud, a bracket that is operably coupled to the forge-welded stud, and a ladder support operably coupled to the bracket.

In some implementations, an apparatus comprises a pipe, a stud that is forge-welded to the pipe, creating a forge-welded stud, a bracket that is operably coupled to the forge-welded stud, and a ladder support operably coupled to the bracket.