A sprung gate for a valve having an endless elastic band sandwiched between first and second gate members that each define an opening therethrough in an open position portion thereof, which collectively form a passage through the sprung gate. The first gate member includes a fastener connected to a fastener receiving member of the second gate member thereby securing the first and second gate members together as a unit. This sprung gate unit is operatively connected to an actuator for linear translation within a pocket of a conduit to control fluid flow through the conduit. This assembled device may be manufactured using spin welding to sealingly mate the conduit to a housing enclosing the actuator.

A blast gate for a vacuum system includes a chassis connectable to a duct and defining a flow passage therethrough, and a gate connected to the chassis and rotatable about a central axis. The gate includes a first portion, an intermediate portion and a second portion spaced apart circumferentially about the central axis. The first portion defines a flow aperture, the intermediate portion defines an auxiliary flow aperture, and the second portion includes a partition. Each of the first portion, second portion and third portion is selectively rotatable into fluid alignment with the flow passage. The blast gate further includes a motor connected to the gate and selectively operable to rotate the gate about the central axis.

A blast gate for a vacuum system includes a chassis connectable to a duct and defining a flow passage therethrough, and a gate connected to the chassis and rotatable about a central axis. The gate includes a first portion, an intermediate portion and a second portion spaced apart circumferentially about the central axis. The first portion defines a flow aperture, the intermediate portion defines an auxiliary flow aperture, and the second portion includes a partition. Each of the first portion, second portion and third portion is selectively rotatable into fluid alignment with the flow passage. The blast gate further includes a motor connected to the gate and selectively operable to rotate the gate about the central axis.

There are provided a steam valve and the like capable of preventing breakage of an auxiliary valve element and effectively suppressing the occurrence of a leak of steam in the auxiliary valve element. In the steam valve of an embodiment, the auxiliary valve element is structured to be in an open state in which the valve rod moves in an opening direction to increase a distance between an auxiliary-valve cap and a main valve element, thereby opening an auxiliary-valve steam introduction hole, and to be in a fully-closed state in which the valve rod moves in a closing direction in which the main valve element is closed to bring the auxiliary-valve cap and the main valve element into contact with each other, thereby closing the auxiliary-valve steam introduction holes. A contact position in which the auxiliary-valve cap and the main valve element are brought into contact with each other is located outside in a radial direction of the valve rod from the outer peripheral surface, of the auxiliary-valve tubular part, through which the auxiliary-valve steam introduction holes are formed.

There are provided a steam valve and the like capable of preventing breakage of an auxiliary valve element and effectively suppressing the occurrence of a leak of steam in the auxiliary valve element. In the steam valve of an embodiment, the auxiliary valve element is structured to be in an open state in which the valve rod moves in an opening direction to increase a distance between an auxiliary-valve cap and a main valve element, thereby opening an auxiliary-valve steam introduction hole, and to be in a fully-closed state in which the valve rod moves in a closing direction in which the main valve element is closed to bring the auxiliary-valve cap and the main valve element into contact with each other, thereby closing the auxiliary-valve steam introduction holes. A contact position in which the auxiliary-valve cap and the main valve element are brought into contact with each other is located outside in a radial direction of the valve rod from the outer peripheral surface, of the auxiliary-valve tubular part, through which the auxiliary-valve steam introduction holes are formed.

An electric switch valve, comprising a valve base and a valve block. The valve base has an upper end surface, and is provided with a first outlet and a second outlet. The valve block has a matching portion and a notch portion. The matching portion is adhered to the upper end surface of the valve base, and can rotate relative to the valve base. The notch portion can be selectively communicated with the first outlet or the second outlet. The valve block further comprises at least one throttling portion. A channel formed in the throttling portion comprises at least one throttling orifice. A valve block, which can not only be applied in an electric switch valve, but also can be applied in valves used for other refrigeration systems so as to achieve the throttling function for the flow of a certain outlet.

A valve assembly includes a valve body with a flow passage intersected by a valve cavity. A valve member is axially movable in the valve cavity between a closed position and an open position, the valve member having an opening that registers with the flow passage when the valve member is in the open position. A valve stem is threadingly connected to the valve member, the valve stem rotatable to move the valve member between the closed position and the open position. A collar assembly is located within a slot of the valve member and circumscribes the valve stem, the collar assembly having an annular collar shoulder. The valve stem has an annular load shoulder sized to engage the collar shoulder, limiting axial movement of the valve member.

A denting device for forming a predetermined pattern on a surface near a discharge hole and an intake hole of a valve plate for a compressor includes: a seating jig to which the valve plate is fixed; a processing pin in which a pressing part for pressing the valve plate is formed at a distal end thereof; and a moving unit which is disposed on an upper portion of the seating jig, horizontally moves the processing pin at a constant speed while allowing the processing pin to vertically reciprocate at a constant speed, so as to form the pattern on the valve plate.

Embodiments provide a gate valve including a first body half that defines a first process fluid aperture, a first chest portion, and a first chest gate support recess formed in the first chest portion. A second body half defines a second process fluid aperture that is aligned with the first process fluid aperture, a second chest portion, and a second chest gate support recess that is formed in the second chest portion. A gate is movable relative to the first body half and the second body half. A first chest gate support is received within the first chest gate support recess, and a second chest gate support is received within the second chest gate support recess.

Embodiments provide a gate valve including a first body half that defines a first process fluid aperture, a first chest portion, and a first chest gate support recess formed in the first chest portion. A second body half defines a second process fluid aperture that is aligned with the first process fluid aperture, a second chest portion, and a second chest gate support recess that is formed in the second chest portion. A gate is movable relative to the first body half and the second body half. A first chest gate support is received within the first chest gate support recess, and a second chest gate support is received within the second chest gate support recess.