A valve device includes a body, a joint, a check valve, a valve seat fixation member having an outer peripheral surface on which an external thread is provided, and a sealing member. The body has an attachment hole that attaches the joint and the valve seat fixation member from an outside of the body in a sequence of the joint and the valve seat fixation member, and that has an inner peripheral surface in which an internal thread screwed to the external thread of the valve seat fixation member is provided. The sealing member is provided between the joint and the valve seat fixation member. An outer peripheral edge of the sealing member is located radially inward of a screwed region of the internal thread and the external thread.

A valve having a hollow body which extends along a main axis (X), in which at least one secondary body is arranged at one end of the hollow body substantially coaxial to the main axis (X) and has an inner end portion with a collar protruding towards the inner surface of the hollow body is disclosed. The hollow body has at least one annular groove in which a ring is arranged at least partially to prevent the movement of the secondary body towards the end of the hollow body, in which the ring is divided into at least two arcs configured to be inserted individually inside the groove of the hollow body to form the ring.

In an opening and closing valve of the invention, an operation dial and a valve body housed in a main body are connected by a rotary shaft, and a regulation member having a first fitting hole engaging with a fitter in the rotary shaft is disposed in a housing space of the main body. When a second fitting hole in the operation dial is released from the fitter in the closed state, the first fitting hole is fitted into the fitter to regulate the rotation, or when the second fitting hole is fitted into the fitter, the first fitting hole is released from the fitter to achieve the rotation.

A ball valve structure includes a valve body having a valve chamber therein. A valve ball is accommodated in the valve chamber. The valve ball defines a flow hole therein. Two gaskets are in close contact with two opposite side surfaces of the valve ball, so that the valve ball can rotate around a fixed point in the valve chamber. One side of one of the two gaskets abuts against a washer and a compression spring, so that the gasket is elastically pressed against a surface of the valve ball. A valve stem is connected to the valve ball through the valve body for driving the valve ball to rotate, enabling the flow hole to be opened.

A valve having a hollow body which extends along a main axis (X), in which at least one secondary body is arranged at one end of the hollow body substantially coaxial to the main axis (X) and has an inner end portion with a collar protruding towards the inner surface of the hollow body is disclosed. The hollow body has at least one annular groove in which a ring is arranged at least partially to prevent the movement of the secondary body towards the end of the hollow body, in which the ring is divided into at least two arcs configured to be inserted individually inside the groove of the hollow body to form the ring.

A method of assembling a valve includes inserting a stem of the valve into a valve body of the valve through an end of the valve body, the stem defining a first end engaged with the valve body; securing a fastener to a second end of the stem; and placing a cap of the valve over the second end of the stem, the fastener engaging the cap.

Improved flow control assemblies for fluid systems (e.g., industrial and/or commercial systems) are provided. More particularly, the present disclosure provides for advantageous ball valve assemblies for fluid systems. In exemplary embodiments, the present disclosure provides for improved ball valve assemblies and related features, systems and methods of use. Exemplary ball valve assemblies of the present disclosure offer advantages over conventional assemblies including, without limitation, advantages in the sealing mechanisms of the ball valve assemblies, and advantages with the user interfaces of the ball valve assemblies (e.g., advantages with the lockout mechanisms). Improved, convenient and effective systems and methods for utilizing improved ball valve assemblies in fluid systems are provided.

Improved flow control assemblies for fluid systems (e.g., industrial and/or commercial systems) are provided. More particularly, the present disclosure provides for advantageous ball valve assemblies for fluid systems. In exemplary embodiments, the present disclosure provides for improved ball valve assemblies and related features, systems and methods of use. Exemplary ball valve assemblies of the present disclosure offer advantages over conventional assemblies including, without limitation, advantages in the sealing mechanisms of the ball valve assemblies, and advantages with the user interfaces of the ball valve assemblies (e.g., advantages with the lockout mechanisms). Improved, convenient and effective systems and methods for utilizing improved ball valve assemblies in fluid systems are provided.

A method of manufacturing a valve with a corrosion-resistant barrier includes providing a valve body defining a first end, a second end, and a body bore extending from the first end to the second end, the valve body further defining a channel co-annular with the body bore, the channel comprising an outer edge defining a seat retention groove; and thermal spraying a corrosion-resistant barrier over the seat retention groove, the corrosion-resistant barrier defining a first edge and a second edge, the first edge oriented between the seat retention groove and the first end of the valve body, and the second edge oriented between the seat retention groove and the second end of the valve body.

A method of manufacturing a valve with a corrosion-resistant barrier includes providing a valve body defining a first end, a second end, and a body bore extending from the first end to the second end, the valve body further defining a channel co-annular with the body bore, the channel comprising an outer edge defining a seat retention groove; and thermal spraying a corrosion-resistant barrier over the seat retention groove, the corrosion-resistant barrier defining a first edge and a second edge, the first edge oriented between the seat retention groove and the first end of the valve body, and the second edge oriented between the seat retention groove and the second end of the valve body.