A method of sealing a coolant control valve of a cooling system for a power device which generates heat as a by-product of operation. The cooling system includes a pump, a heat exchanger, and coolant. The valve includes: an internal channel in fluid communication with the exchanger; a sealing package in contact a surface of the coolant control valve and bounding a portion of the cooling system and the channel; and a rotary element in the channel and rotatable to open and close the valve. The portion is bounded in part by the valve and the sealing package. The method includes: starting-up the device; creating a pressure differential of at least 0.2 bar between the coolant in the portion of the cooling system, and the coolant in the internal channel; rotating, using a motor, the rotary element; opening the valve; and pumping, using the pump, the coolant through the internal channel.

A plug valve including a valve body defining an internal cavity, a first passage, and a second passage, a plug defining a third passage and being rotatable within the internal cavity, and an insert extending within the internal cavity between the valve body and the plug. The insert defines an interior surface and an opening aligned with the first passage of the valve body. The insert may also define a sealing surface extending around the opening and standing in relief against the interior surface to sealingly engage the plug. In addition to, or instead of, the sealing surface, the insert may define a projection at least partially defining the interior surface. In addition, a boot may be connected to the valve body and interlocked with the projection to prevent, or at least reduce, rotation of the insert relative to the valve body when the plug rotates within the internal cavity.

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.

According to one embodiment a gas tap is provided that includes a manually operable shaft having a first end coupled to a regulating element and a second end configured to be coupled to a knob that can be operated by a user. The shaft includes a first locking element, and the gas tap includes a second locking element. The shaft is rotational between an initial angular position and a final angular position, and is axially movable when it is arranged in the initial angular position between a first axial position in which the first locking element and the second locking element cooperate with one another, preventing the shaft from being able to rotate, and a second axial position in which the shaft is able to rotate. The user has to pull on the shaft in order to move it from the first axial position to the second axial position.

A single waterway shaft structure includes a valve housing, a valve cover, a temperature control rod assembly composed of a water stopper and a temperature adjustment rod, a spring, and a gasket. A lower portion of the temperature control rod assembly is formed with an eccentric water hole. The gasket and the spring are placed in an eccentric water inlet of the valve housing in order and confined in the valve housing. The temperature control rod assembly cooperates with a faucet handle. A one-way connecting structure is provided between the valve cover and the valve housing. An upper end of the valve cover is provided with a fan-shaped limit block for limiting the turning angle of the temperature control rod assembly. The shaft is designed to be one-piece.

A single waterway shaft structure includes a valve housing, a valve cover, a temperature control rod assembly composed of a water stopper and a temperature adjustment rod, a spring, and a gasket. A lower portion of the temperature control rod assembly is formed with an eccentric water hole. The gasket and the spring are placed in an eccentric water inlet of the valve housing in order and confined in the valve housing. The temperature control rod assembly cooperates with a faucet handle. A one-way connecting structure is provided between the valve cover and the valve housing. An upper end of the valve cover is provided with a fan-shaped limit block for limiting the turning angle of the temperature control rod assembly. The shaft is designed to be one-piece.

A ball valve with offset straight through flow is provided. The ball valve has a housing having an inlet and an outlet and an internal cavity. A non-spherical ball valve member is positioned within the internal cavity. The valve member is mechanically coupled to a valve stem extending from the internal cavity to an exterior of the housing such that rotation of the valve stem results in a like rotation of the valve member. The ball valve has a fully closed position wherein fluid flow therethrough is prevented. The ball valve member also has a fully opened position where fluid flow therethrough is allowed. The ball valve can transition from the fully closed position to the frilly opened position and vice versa with a rotation of the valve member of less than or equal to about forty-five degrees.

A control gas ball valve for high pressure gas cooking appliances provides a linear surface slot along its rotation direction. When turned by a control knob and enters a gas inlet, the said surface slot is able to channel gas input to a hole that connects said surface slot to the center of the valve ball. The gas in the center of the valve ball is directed away to a burner for cooking purposes. The said linear surface slot is able to provide constant flowrate slope for continuously variable power adjustment and a maximum power plateau. These are the most desirable features in residential cooking.

A valve and method for producing a valve for regulating a fluid, the valve including a valve housing with a central part and two connection ends, the connection ends extending away from the central part. Internally of the central part, there is arranged a valve body with a through-going aperture that is arranged in a valve seat and connected to a valve spindle, the valve spindle being arranged in a spindle guide stub on the valve housing. The valve housing is made from a plastically deformed tubular item and includes a collared spindle guide stub with at least one projection, the projection or projections extending in continuation of the spindle guide stub. This projection can be used as a lock ensuring that the valve spindle is retained in its intended position, and at the same time, such projections can form stops at the extreme positions of the valve body.

A handle assembly is provided for an outlet valve of a tank car wherein the outlet valve has a valve stem rotatable about an axis and is operative to open and close the outlet valve. The handle assembly includes a valve handle for manually opening the outlet valve, a rotatable shaft coupled to the handle, and a coupling coupled to the outlet valve and selectively coupleable to the shaft. A valve rotation control structure includes a first movement control component on one of the coupling and the shaft. The valve rotation control structure is configured to permit the coupling or shaft to move parallel to the axis of the valve stem between a first locked position and a second rotatable position and to rotate about the axis of the valve stem between a first valve closed position and a second valve open position at the second rotatable position.