A low profile elbow, and a process of manufacturing the same, includes a tube secured at two different location in two different planes of a base, wherein an end surface of the tube is positioned at an acute angle with respect to a tube axis, and wherein the tube defines a center of curvature positioned lower than a lower surface of the base.

A mandrel 10 for producing a thin-walled bent tube having a bending portion with high strength and a small radius of curvature by rotary draw bending without either cracks in an outside of bend or winkles and buckling in an inside of bend occurring includes a shank 14, a connection mechanism 15 and a mandrel ball 16. In a cross-section orthogonal to an axial direction of the mandrel ball 16 at a central position in the axial direction of the mandrel ball 16, the mandrel ball 16 has a first position 19 and a second position 20 at which a first straight line m that passes through a mandrel ball center 17 meets an outer periphery 21 of the mandrel ball. Further, a ratio (L.sub.1/L.sub.2) between a dimension L.sub.1 from the mandrel ball center 17 to the first position 19 and a dimension L.sub.2 from the mandrel ball center 17 to the second position 20 is in a range of 0.915 to 0.976.

The present invention relates to a service valve including a service valve unit 100 with a valve handle 137 exposed to the outside and a fitting device 200 provided with a fitting housing 120 coupled to the service valve unit 100 at one end of the fitting housing, and more particularly, the present invention provides the service valve including the fitting device, characterized in that the fitting housing 120 includes an outer thread formed by a predetermined length on an outer ring at the other end of the fitting housing, and a first inner boss protruding from the other end at a predetermined depth, in addition, the fitting device 200 includes: a cap handle 50 screwed to the outer thread of the fitting housing 120; a ring lock washer spring 25 seated on the first inner boss; and a sleeve 35 fitted into an inner bore of the other end and interposed between the ring lock washer spring 25 and the cap handle 50, wherein the sleeve 35 moves and presses the ring lock washer spring 25 by rotation of the cap handle 50 to expand a diameter of the inner bore, so as to dismantle a pipe 165 previously inserted in the fitting device 200.

A fluid conduit includes, a body, a first conduit portion connected to the body, a second conduit portion connected to the body, and a base connected to the second conduit portion. The body, the first conduit portion, the second conduit portion, and the base may be formed as a monolithic component via additive manufacturing. A method of making a fluid conduit may include forming sets of layers. The set of layers may include parts or portions of the fluid conduit and/or supports.

A tube is disclosed comprising an inlet portion, an outlet portion, and a curved tube portion between the inlet and outlet portions. A vertical cross-section of the curved tube portion comprises two substantially straight inner delimiting surfaces meeting each other at an angle <100°. The present disclosure further relates to a method of manufacturing a tube, a computer program, and a computer-readable medium.

A mandrel 10 for producing a thin-walled bent tube having a bending portion with high strength and a small radius of curvature by rotary draw bending without either cracks in an outside of bend or winkles and buckling in an inside of bend occurring includes a shank 14, a connection mechanism 15 and a mandrel ball 16. In a cross-section orthogonal to an axial direction of the mandrel ball 16 at a central position in the axial direction of the mandrel ball 16, the mandrel ball 16 has a first position 19 and a second position 20 at which a first straight line m that passes through a mandrel ball center 17 meets an outer periphery 21 of the mandrel ball. Further, a ratio (L.sub.1/L.sub.2) between a dimension L.sub.1 from the mandrel ball center 17 to the first position 19 and a dimension L.sub.2 from the mandrel ball center 17 to the second position 20 is in a range of 0.915 to 0.976.

A plumbing system pressure protection valve assembly that utilizes a unitary body to connect a hot water tank to a cold water supply, a vacuum breaker, and an expansion tank. The assembly includes two ball valves coupled to the unitary body to isolate the hot water tank from the cold water feed and to isolate and permit draining of the expansion tank. The assembly also includes a rod and foot coupled to a tab on the unitary body to provide support for the expansion tank service valve assembly.

The present invention relates to a pipe coupler that is capable of avoiding a fluid flowing along pipes from coming into direct contact with the pipes made of metal materials, a body, and tie rings, thereby preventing their corrosion, avoiding pipes, even if the pipes made of different kinds of materials are connected, from being indirectly connected to each other by means of a fluid flowing along the insides thereof, thereby preventing electric corrosion caused by the micro current contained in the fluid, and absorbing a dimensional tolerance between the pipes having different sizes, thereby ensuring simple installation.

A method for producing a curved tubular connection element has at least the following production steps: machining a linearly extending metal tube piece (10) with a specifiable length while incorporating connection geometries (12, 14) for receiving separate connection parts (18, 20) to connect a media-conducting piping; carrying out a bending process for the tube piece (10) produced by being machined with a specifiable bending radius, preferably up to 90 degrees; and attaching each connection part (18, 20) to the respective connection geometry (12, 14) that can be paired with it.

Systems repair jet pump elbow joining structures like RS1 and RS2 welds. Systems include a base having legs that secure to ends of the elbow in different directions, and a drive plate that joins to flow conduits where they meet the elbow. The drive plate and base may then be pushed together, resulting in compression or joining of the elbow and flow conduit. Multiple drive plates may be used with a single base to compress multiple flow conduits to the base. The base and the drive plates can be driven together with a driving bolt extending through the base and driving plate. To provide a better fit, grooves can be created in the flow conduits through machining from the installed base. The drive plate may be seated into the groove to achieve a desired orientation with less slippage. Example embodiments and methods do not require welding or a welding base.