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.

A diaphragm valve includes a valve body, a diaphragm, a bonnet, an operation mechanism, and a fixing mechanism. The fixing mechanism includes a clamping member for integrally sandwiching and fixing, from both right and left sides, circumferential edges of both the bonnet and the valve body. A circular pressing member for pressing a circumferential edge of the diaphragm from above is interposed between the diaphragm and the bonnet and has convex portions and concave portions. The convex portions fit into notches provided at the circumferential edge of the diaphragm or the valve body, and the concave portions are fitted by protrusions provided at the circumferential edge of the diaphragm or the valve body.

A valve device includes a body having a fluid passage formed therein, a valve element configured to open and close the fluid passage, a stem arranged to be configured to move toward and away from the valve element to cause the valve element to open and close the fluid passage, an actuator having a casing coupled to the body, and drive unit arranged in the casing to drive the stem by an operating fluid supplied from outside, and a valve mechanism provided at the casing and configured to open and close a passage of the operating fluid to the drive unit.

A valve closure for a dispenser comprises a rigid body portion and a flexible diaphragm that engages the body portion when the valve closure is mounted in the dispenser. The valve closure may include a combination central boss/pin and dispensing orifice that, through a self-closing and self-sealing action, cuts off material flow following dispensation. Such configuration of a central boss/pin may also tend to prevent or at least reduce orifice re-healing by holding open the orifice during periods of non-use when the orifice is cut-off to material flow. For example, the central boss/pin may include an undercut region with which an annular lip of the orifice may engage to seal the orifice. The valve closure may further include a secondary channel, in addition but separate to a primary fluid flow channel, which may be used to provide external air venting that is completely or substantially de-coupled from fluid dispensation.

A flow distribution device for bioprocess systems, comprising: a flow distribution manifold (12; 112) comprising: at least four fluid connection conduits (14), wherein each fluid connection conduit (14) comprises a first end (18) for fluid connection and an opposite second end (20), and wherein at least three of the fluid connection conduits comprise a membrane (19a) and a valve seat (19b), which membrane (19a) can be put in at least two different positions in relation to the valve seat (19b) for allowing or preventing fluid flow between the first end (18) and the second end (20) of the fluid connection conduit (14); and a central common compartment (30) to which the second ends (20) of each of the fluid connection conduits (14) are connected, whereby the first ends (18) of each of the fluid connection conduits (14) can be in fluid communication with the central common compartment (30) and wherein the fluid connection conduits (14) are entering the central common compartment (30) from at least three different directions; wherein said flow distribution device (10) further comprises at least three membrane actuation members (41) which are provided in connection with one membrane (19a) of the flow distribution manifold (12; 112) each, wherein each of said membrane actuation members (41) is configured for actuating the membrane (19a) to be in at least two different positions in relation to the valve seat (19b), wherein a first position of the membrane (19a) allows flow between the first end (18) and the second end (20) of the fluid connection conduit (14) and a second position of the membrane (19a) prevents flow between the first end (18) and the second end (20) of the fluid connection conduit (14).

A diaphragm valve includes a body 3 having a flow path 2 formed therein, a sheet 4 formed in the flow path 2, a metal diaphragm 5 for opening and closing the flow path 2 by abutting on or separating from the sheet 4, a pair of clamping parts 6 and 7 for claiming peripheral edge portions of both side surfaces of the metal diaphragm 5 respectively to fix the metal diaphragm 5 to the body 3, and an actuator 8 for abutting the metal diaphragm 5 on the sheet 4 or separating the metal diaphragm from the sheet 4, wherein a fluorine resin coating is formed on a sheet side surface 5a of the metal diaphragm 5 in a region excluding a clamping region D-C between the sheet side surface 5a and the clamping part 7, and at least in a contact region B-A with the sheet 4 in a region C surrounded by the clamping region D-C.

An intermediate piece for a stop valve, in particular a membrane valve, for fluids including a pressure piece. The pressure piece has at least two locking slides for locking a locking member of a closure element. The intermediate piece includes a cylinder in which the pressure piece can be guided in axial manner. The intermediate piece has a recess, which is arranged in such a way that in mounting position of the pressure piece the locking slide can be shifted into the recess, thus releasing the locking member.

There is provided a shut-off valve including: a valve body part having a valve body surface; a valve seat part provided around an inlet, and having a valve seat surface disposed at a position opposite to the valve body surface; and a moving mechanism that is connected to the valve body part, and moves the valve body part in a direction of an axis to switch to either a shut-off state or a circulation state, wherein the valve seat part has an endless inner peripheral side projection and an endless outer peripheral side projection that project from the valve seat surface toward the valve body surface along the axis, and the valve body part has a diaphragm forming the valve body surface, and an elastic member disposed on a back surface of the diaphragm.

A vacuum valve improving product performance of a packing ring to extend a replacement period of the packing ring is disclosed. As an opening and closing driving guide groove including a protruding groove section and first and second inclined groove sections is defined in each of both side surfaces of a driving block, and an L-motion roller inserted into and moving along the opening and closing driving guide groove is provided on an L-motion block, when the L-motion roller is disposed at an end of the first inclined groove section, one side surface of a valve blade closes an inlet, and when the L-motion roller is disposed at an end of the second inclined groove section, one side surface of the valve blade closely contacts an inner surface of the housing. The packing ring provided on a closing surface of the valve blade is blocked from contacting air or fluid.

A method of fabricating a fluid component body includes forming a monolithic fluid component body including a valve segment having an annular upper perimeter wall portion defining a valve cavity and a lower base portion defining first and second flow ports, and a conduit segment extending from one of the first and second flow ports and including a conduit end portion defining a tubular portion extending in a first direction and spaced apart from a remainder of the fluid component body. The conduit end portion is bent from the first direct to a second direction.