By preventing a twist of the diaphragm when assembled, various adverse effects arising from such a twist of the diaphragm are completely eliminated. Provided is a set of jigs for assembling a valve including a pair of above and below fixing jigs, a rotation-stop jig, and a fixing means: the rotation-stop jig is inserted and fixed to the above fixing jig in a non-rotational state; the fixing means fixes non-rotatably and attachably the rotation-stop jig and a bonnet of the valve to each other; a body of the valve is inserted and fixed to the below fixing jig in a non-rotational state; the bonnet and the body are fixed independently from each other in a non-rotational state, thereby preventing an outer periphery of a diaphragm from twisting in which a lower surface of an outer periphery of the bonnet and an outer seal part of the body are tightly attached to and hold the outer periphery of the diaphragm.

Provided is a valve device in which influence of a physical impact on a valve element is further reduced. Valve device includes a valve seat disposed around an opening connected to a flow path formed in a valve body, a diaphragm for opening and closing flow path by moving between a contact position and a non-contact position with respect to the valve seat, a presser adapter that contacts a peripheral portion of the diaphragm, a casing that incorporates an actuator for actuating the diaphragm and is fixed on the valve body by being screwed into a screw hole formed in the valve body, and an adapter fixing ring that is screwed into the screw hole and thereby fixed in the valve body while pressing the presser adapter and the diaphragm.

According to one aspect, a fluid control system is provided comprising a servicing tool set and at least one valve assembly comprising an actuator and a valve operationally engageable therewith; each valve comprising a valve body; each actuator comprising an actuator body having an upper base and side walls; wherein each actuator body is engageable with a valve body, and wherein the system is configured to allow: engaging the servicing tool set with an actuator and subsequently applying torque to an actuator body engaged with a valve body and thereby disengaging the actuator body from the valve body; the at least one valve assembly comprising at least one Normally Closed (NC) valve; wherein the NC valve is configured to allow activating an actuator engaged therewith with pressurized fluid and thereby opening the NC valve, wherein the actuator comprises a nipple and the servicing tool set comprises a ratchet and at least one socket engageable with the actuator body, and wherein the at least one socket is sized and shaped to accommodate the nipple, and wherein the servicing tool set is further configured to allow operationally coupling the pressurized fluid to the actuator.

A valve cavity cap arrangement including an insert and a threaded cap is provided in combination with a valve body defining a valve cavity, a central passage, and at least one offset passage. The insert is received in the valve cavity and includes an inner annular sealing surface sized to seal against a portion of the recessed surface surrounding the central passage, an outer annular sealing surface sized to seal against an outer periphery of the recessed surface, surrounding the offset passage(s), and a solid web portion extending between the inner and outer annular sealing surfaces. The threaded cap includes an outer threaded portion threadably engaged with an internal threaded portion of the valve cavity, a central end portion configured to apply a first sealing force to the inner annular sealing surface, and an outer end portion configured to apply a second sealing force to the outer annular sealing surface.

A diaphragm valve includes a valve housing in which a switching rocker, which is pivotable about a pivot axis and which interacts with a control diaphragm for opening and closing at least one valve channel, is arranged. The pivot axis is defined by a mounting web, on which the switching rocker bears in a pivotably movable manner. The mounting web is an integral constituent of a mounting unit, said mounting unit being fastened to the valve housing in a drive chamber by way of fastening measures. Without the fastening measures, the mounting unit can be displaced in order to adjust a desired height distance of the mounting web.

A valve includes a valve body having first and second fluid ports extending to a valve cavity, a seat carrier subassembly installed in the valve cavity and including a seat carrier body with a first annular inner wall defining a first flow aperture aligned with the first fluid port and a valve seat disposed in an annular recess surrounding the first annular inner wall, and a second annular inner wall defining a second flow aperture aligned with the second fluid port. A valve element is disposed within the valve cavity and is movable between a closed position sealing against the valve seat and an open position permitting fluid flow across the valve seat between the first and second flow apertures. An outer periphery of an orifice restriction is seated against an interior portion of one of the first annular inner wall and the second annular inner wall.

The present invention provides a miniaturized valve device capable of dramatically increasing the degree of freedom in arranging a flow path of a valve body while securing a necessary flow rate. The valve device includes a valve seat support provided in an accommodation recess and having a support surface with which a sealing surface of a valve seat abuts and supports a pressing force from the sealing surface; a diaphragm provided in the accommodation recess so as to abut and be separable from a seating surface of the valve seat and seals the opening side of the accommodation recess; the valve seat support having sealing surfaces which cooperates with a part of the inner wall surface of the accommodation recess to bock the communication between a primary flow path and a secondary flow path, and a detour passage that connects the primary flow path and a flow passage of the valve seat.

The present disclosure provides a gas flow regulating device and a mass flow controller. The gas flow regulating device includes: a valve port component, in which a first inlet channel is provided; a push rod component, in which a first through hole is provided, a push rod being provided in the first through hole, a first end surface of the push rod facing a gas outlet end of the first inlet channel, and the push rod being elastically connected with the push rod component through an elastic diaphragm; and a driving assembly configured to drive the push rod to move along a direction of approaching or leaving the first inlet channel to cause the first end surface of the push rod to be in contact with and seal or separate from the gas outlet end of the first inlet channel. In the gas flow regulating device, the structure can be simplified, the number of parts in contact with gas can be reduced, and the fault caused by the failure of a spring piece can be avoided.

Technologies are described for devices and methods to seal a diaphragm to a body exterior seal periphery. The methods may comprise rotating a handwheel of a bonnet assembly to move a load plate to apply a compression force to a top portion of a transition pressure ring. The top portion of the transition pressure ring may have a circular cross section. A bottom portion of the transition pressure ring may include a bead that may project out from a bottom surface of the bottom portion and may have a congruent shape and size as the body exterior seal periphery. The body exterior seal periphery may not be congruent to the circular cross section of the top portion. The compression force may press the bead against a diaphragm assembly and the diaphragm against the body exterior seal periphery, to seal the diaphragm to the body exterior seal periphery.

Technologies are described for a diaphragm. The diaphragm may comprise a structure. The structure may be a disc shape with a top and bottom side. The top and bottom sides may be circular in outline. The diaphragm may comprise a diaphragm stud at a center point on the top side. The diaphragm stud may be configured to couple with a connector of a bonnet assembly. The diaphragm ma comprise a diaphragm bead on the bottom side. The diaphragm bead may be along a first axis. The diaphragm may comprise at least one tab which may extend radially from the structure along at an outer edge of the structure he at least one tab may engage with a bonnet notch of a bonnet assembly to align the diaphragm to the bonnet assembly.