The present disclosure relates to a rotary plug valve and, more particularly, to a rotary plug valve having a fluid conduit cartridge including components that are assembled in a manner allowing for the rotation of a valve handle without rotation of the entire valve or supply line. Illustratively, a retainer ring and a backer ring are coupled with a gripper ring positioned therebetween. Coupling of the retainer ring and the backer ring creates compression on locking tabs of the grip ring, holding the locking tabs in place between tangs of the backer ring and preventing rotation of the gripper ring.

The invention relates to a method for producing a rotary slide valve for regulating a flow of a fluid, comprising a rotary slide (02) which is rotatably mounted about a rotational axis (R) in a valve housing. The method has the steps of: producing the rotary slide (02) in an injection molding method, in particular in a plastic injection molding method; producing at least one circumferential or casing section (04) of the valve housing (03) in an injection molding method, in particular in a plastic injection molding method; and installing the rotary slide valve or a precursor thereof. According to the invention, a gap is formed between the rotary slide (02) and the directly adjacent valve housing circumferential or casing section (04) of the valve housing (03) in the radial direction, said gap allowing the rotary slide (02) to rotate about the rotational axis (R) and facilitating a seal which does not exceed a tolerable leak between the rotary slide (02) and the circumferential or casing section (04) of the valve housing (03).

A valve for controlling a fluid flow comprises: (a) a valve body having an internal cavity; (b) a valve stem receivable within the internal cavity; the valve stem having a control portion configured and a tail portion; the control portion having a first diameter thereof; (c) a deformable valve seat carried by the control portion in a coaxial conformal manner; and (d) a ring mountable within the internal cavity. The control portion has a circumferentially arranged area adjacent to the tail portion. The circumferentially arranged area is of a second diameter smaller than the first diameter. The ring is mountable between a nut and the valve seat such that the nut when secured to the valve body presses onto the valve seat such that the valve seat is deformed within a space between the circumferentially arranged area defined by the second diameter and fills the space in a sealed manner.

A plug for use in a plug valve includes an attachable upper trunnion that is assembled to the main plug body using fasteners and a male-female dovetail fit. The tensile and compressive loading experienced by the main plug body during its linear motion, and the torsional loading experienced during its 90° rotation, is supported by the fasteners and the dovetail fit.

A valve device includes: a casing having an outflow port in which a fluid outlet opening is formed; a joint joined to an opening end surface of the outlet opening; a valve accommodated in the casing so as to be rotatable or slidable and in which a communication port that can communicate with the outlet opening is formed; and a sliding ring with a sliding surface for sliding on an outer surface of the valve while being accommodated in the outflow port and communicates the outlet and the communication port based upon a position of the valve. At least the outer surface of the valve includes a first resin material that contains a first resin, at least the sliding surface of the sliding ring includes a second resin material that contains a second resin, and the first resin and the second resin are the same type of resin.

A seal assembly for use in a fluid valve includes: an actuatable valve body configured to open and close at least one connection of the fluid valve; at least one seal configured to sealingly abut against the valve body at one side of the valve body and to sealingly abut against a valve housing of the fluid valve at another side of the valve body; and at least one elevation from a lateral surface of the valve body integrally formed on the valve body sectionally, the at least one elevation being configured to activate the seal in a closed position of the fluid valve.

A multifunction valve includes a valve body defining an inlet, and outlet and an interior chamber. A flow control gate may be disposed within the interior chamber and comprises one or more protrusions configured to provide a high level of precision control of a fluid flow rate through the multifunction valve as the flow control gate is rotated through an arcuate range of positions. The protrusions may comprise a cut-out portion, wherein the size and/or shape of the cut-out may be configured to modify the fluid flow rate through the multifunction valve. A method of modulating a fluid flow rate includes directing fluid flow through a multifunction valve from an inlet to an outlet, the multifunction valve including a flow control gate, adjusting the flow rate through the multifunction valve by rotating a control shaft to position the flow control gate to variably occlude the outlet of the multifunction valve.

A drain petcock having a central channel for drainage, a side wall aperture for draining, and a closing plug that closes the central channel and overlies the side wall aperture. The partial removal of the closing plug enables a controlled flow for initial draining. A full removal of the closing plug enables a more controlled flow through the central channel for further draining.

Provided are a two-way valve for flow rate control and a temperature control device using the same, which can linearly control a flow rate of a fluid with good accuracy as compared to a switching valve in which a communication hole is simply formed in a valve element so as to open a flow passage through alignment with an outflow portion. The two-way valve for flow rate control, includes: a valve main body (6), which includes a valve seat (8) having a columnar space, and has a first valve port (9) formed in one end portion of the valve main body in an axial direction of the valve seat (8) so as to allow flow of a fluid, and a second valve port (11) that is formed in a peripheral wall of the valve seat (8) to allow flow of the fluid and has a rectangular cross section; a valve element (12), which is arranged in a freely rotatable manner in the valve seat (8) of the valve main body (6), and has a shape forming a part of a cylindrical shape having a predetermined central angle (α) so as to linearly change an opening area of the second valve port (11); and drive means (3) configured to rotate and drive the valve element (12).

A valve for controlling a fluid flow comprises: (a) a valve body having an internal cavity; (b) a valve stem receivable within the internal cavity; the valve stem having a control portion configured and a tail portion; the control portion having a first diameter thereof; (c) a deformable valve seat carried by the control portion in a coaxial conformal manner; and (d) a ring mountable within the internal cavity.

The control portion has a circumferentially arranged area adjacent to the tail portion. The circumferentially arranged area is of a second diameter smaller than the first diameter. The ring is mountable between a nut and the valve seat such that the nut when secured to the valve body presses onto the valve seat such that the valve seat is deformed within a space between the circumferentially arranged area defined by the second diameter and fills the space in a sealed manner.