A rotational high purity or ultra-high purity gas fitting or process cooling or critical process cooling water fitting comprising an inlet pipe, inlet flange, outlet flange, a compression mechanism (such as a nut and bolt mechanism), a rotational outlet pin comprising an interior flange, a sealing void, a sealing element, and an outlet pipe. The rotational high purity or ultra-high purity gas fitting or process cooling or critical process cooling water fitting provides a fitting wherein at least one end (inlet or outlet) is capable of a full 360 degree rotation clockwise or counterclockwise while maintaining a high purity and ultra-high purity gas seal or a or process cooling or critical process cooling water seal. Functional rotating ability in live and non-live systems (while gas or other medium is flowing).

A multi-seal coupling for fluidly interconnecting a first component and a second component within a hydrogen fuel supply system of a gas turbine engine includes a female joint portion and a male joint portion. A first seal, a second seal and a third seal, all of which are hydrogen fuel seals, are formed between the male joint portion and the female joint portion. The first seal is formed by face-to-face abutting contact between a first axially-facing surface of the male joint portion and an axially-facing surface of the female joint portion. The second seal is formed by a gasket axially compressed between the first axially-facing surface of the male joint portion and the female joint portion. The third seal is formed by a sealant ring disposed between a second axially-facing surface of the male joint portion and an adjacent surface of the female joint portion.

Provided is a corrugated pipe connection device. The device includes a corrugated pipe including a groove and a ridge that are successively and alternately formed, a nut into which one side portion of the corrugated pipe is inserted, wherein the nut has a screw-thread on an inner circumferential surface thereof, a clamping ring being formed in a ring shape cut at one place thereof and including an inner portion formed convexly in a radially inward direction of the corrugated pipe to be inserted into the groove of the corrugated pipe and an outer portion protruded in a radially outward direction from the inner portion, wherein the outer portion comprises an outer circumferential surface, and a socket having a screw-thread on an outer circumferential surface thereon onto which the nut is screwed.

A fluid fitting includes a nut, a sleeve, and a union. The union and the nut may include corresponding stops. Corresponding stops may engage with each other when the nut is sufficiently connected with the union. A method of designing a fluid fitting including a union may include determining a gauge diameter of the union, determining a plane perpendicular to an axis of rotation of the union that includes a center point of the gauge diameter, determining a point of intersection of threads of the union with the perpendicular plane, and/or determining a position of a stop according to an angle from the point of intersection.

A fluid fitting includes a nut, a sleeve, and a union. The union and the nut may include corresponding stops. Corresponding stops may engage with each other when the nut is sufficiently connected with the union. A method of designing a fluid fitting including a union may include determining a gauge diameter of the union, determining a plane perpendicular to an axis of rotation of the union that includes a center point of the gauge diameter, determining a point of intersection of threads of the union with the perpendicular plane, and/or determining a position of a stop according to an angle from the point of intersection.

A corrugated pipe connection device is completely coupled by primarily screwing a nut and a socket after interposing a clamping ring between the nut and the socket, inserting an one-side portion of a corrugated pipe, including a groove and a ridge that are successively and alternately formed, into the nut, and secondarily screwing the nut and the socket so that an inner portion of the clamping ring is inserted into the groove of the corrugated pipe and a distal end of the corrugated pipe is pressed. The corrugated pipe connection device is easily coupled in a simplified manner and is capable of achieving enhanced sealing efficiency.

A fluid fitting includes a nut, a sleeve, and a union. The union and the nut may include corresponding stops and corresponding markings. Corresponding stops and corresponding marking may engage with each other when the nut is sufficiently connected with the union. A method of connecting a fitting includes connecting a sleeve of the fitting with a nut of the fitting, connecting the nut with a union, rotating at least one of the nut and the union until a stop of the nut engages a stop of the union, restricting over torque via the stop of the nut and the stop of the union, and verifying a sufficient connection if first markings of the nut align with second markings of the union.

A valve connector includes a connecting member, a threaded member, a joint member, and first and second connection assemblies. The connecting member is inserted into an axial hole of the threaded member to cause an abutting portion of the connecting member to enter into the axial hole. The joint member forms two threaded sections at two opposite ends thereof. The two threaded sections are alternatively detachably connected to a threaded portion of the threaded member so that a first seal ring of the first connection assembly and a second seal ring of the second connection assembly are alternatively removably abutted against the abutting portion for connecting a Schrader valve and a Presta valve.

A system for coupling pipe segments endwise to each other comprise a tubular hub secured proximate to an end face of each pipe segment, each hub having a radially extending mounting block therearound, a seal extending around the hubs between the mounting blocks and a clamping ring sized to extend around the tubular hub, said clamping ring having a radially extending positioning lip at each end of wherein the positioning lips surround the mounting blocks.

A gland includes an annular ring, the annular ring defining a gland bore, the gland bore defining a gland axis extending through the annular ring; and a joint restraint assembly, the joint restraint assembly including a restraint base, the restraint base attached to the annular ring, the restraint base defining a restraint pocket, the restraint base including a structural rail; a gripper, the gripper disposed within the restraint pocket and configured to move in the restraint pocket; a spring biasing the gripper to move inwards towards the gland axis; and a cover contacting at least a portion of the restraint base.