Abstract: There is provided herein an improved rupture panel or disk that consists of a sheet metal top section with a relatively thick polymer foam seal attached thereto. In the preferred arrangement the instant invention does not require a separate support member. The foam sealing component is preferably attached to the top section by some sort of adhesive to hold it in place and it is installed on the process side of the top section. Additionally, the sealing member is preferably of a thickness which is substantially thicker than would typically be used in a conventional rupture panel arrangement. In another preferred embodiment the sealing member is also designed to function as a gasket, thereby eliminating the need for that separate member.

Abstract: A rupture panel for relieving an excess pressure differential between the interior and exterior of a vessel having a wall and an opening through the wall includes a first frame section connected to the vessel wall at the opening and a pair of pressure relief panels mounted to the frame, each panel having a stitched portion, the stitched portions providing opening capability on both vacuum and burst pressure control (or on either vacuum or burst pressure control). A pair of sealing members that sandwich the pair of pressure relief panels there between are provided, one of the sealing members engaging one of the pressure relief panels, the other sealing member engaging the other pressure relief panel. Each of the sealing members has a sealing surface that covers a stitched portion of an adjacent relief panel.

Abstract: A sanitary rupture disk apparatus includes a rupture disk member having a periphery and a stitched portion, preferably positioned next to the periphery. A hinge area that is unstitched is provided also at the periphery of the rupture disk member. A peripheral holder or support engages the periphery of the disk member, the peripheral support being comprised of a pair of backup rings and a flexible, preferably polymeric member. The polymeric member can be in the form of a two-part flexible sanitary gasket. A pair of annular flanges of the flexible gasket extend radially inwardly of the peripheral support, each of the flanges overlapping and sealing the stitched portion of the disk member, the flanges enabling a pressure loading of the disk member.

Abstract: A thermoformed reverse buckling polymer rupture disk having an unsupported raised center portion including score lines cut in the polymer disk that creates a line of weakness to control the buckling pressure of the disk and forms a predetermined burst pattern.

Abstract: A polymer rupture disk in the form of a cartridge or capsule that can be inserted in a fluid line fixture as a replaceable unit to establish a predetermined rupture pressure or safety pressure for that particular pressurized container.

Abstract: A reverse buckling disk has an annular retaining flange for mounting in a flow passageway. The annular retaining flange is integrally formed with a central domed portion having a concave side and a convex side. The disk has a predetermined material thickness and domed height for establishing a rated pressure at which the central domed portion reverse buckles. A metal cutting element or knife is fixedly attached to at least a portion of the convex side of the central domed portion in surface-conforming relationship. The metal cutting element has a thickness greater than the thickness of the disk material and has at least one knife point thereon for cutting the disk as the central domed portion reverse buckles at the rated pressure.

Abstract: A differential pressure flow sensor for use in a flow passageway of very low pressure flow lines and utilizing at least first and second conductive membranes in superimposed relationship having center portions constructed to create a discontinuity to allow a predetermined flow rate therethrough. A conductive strip is in juxtaposed relationship with the superimposed membranes and has a normally closed switch position. When the flow in the flow passageway exceeds the predetermined flow rate, the pressure against the flexible membranes opens the switch of the conductive strip and provides an electrical indication of the open switch.

Abstract: A pressure sensor assembly includes a disk entirely of metal and having a plurality of circumferentially spaced petals, separated by a plurality of radially extending slots. The slots extend from the periphery of the disk to a position near the center. However, the disks are in electrical communication with one another. A pair of wire leads are respectively placed at terminals on two separate spaced-apart disks with the opposite end portion of the leads connected to an alarm monitor. The disk body can be used in low or high temperature applications and is corrosion resistant and preferably entirely metallic (for example, stainless steel). The disk body is designed to be installed between standard pipe flanges, between a flange and a rupture disk holder, or in a holder that is used as, or located downstream of, a rupture disk or similar device. The device is designed to cause a discontinuity (open circuit) in an electrical circuit as a result of fluid flow through the pipe.

Abstract: A "slip-joint" type of sensor having a tab design consisting of a unique shape which permits easy manufacture, low resistance to sliding forces, and reliable electrical contact. The unique switch or tab and body design provides positive electrical contact without the need for costly, full diameter, annular sheet metal rings. The sensor body lies in a single common plane and may have a variety of shapes depending on the flow rate to be permitted without tripping the sensor. The sensor may be hermetically sealed by a thin-film polymer liner to permit no flow through the sensor without a signal. The liner may be on either or both sides of the sensor. This design permits use of the liner designed to withstand a static pressure without bursting. At the static pressure, however, the liner will be deformed sufficiently to trip the sensor.

Abstract: A rupture disk with an annular flange that permits the disk to be clamped in place in a pressure system between an outlet holder and an inlet holder. The rupture disk is characterized by an eccentric score line formed on its annular flange radially outwardly beyond the dome of the rupture disk. A spacer and support ring are utilized to assist in the removal of that portion of the annular flange of the disk which ruptures from between the outlet holder and inlet holder.

Abstract: A rupture disk provides an improved scoring configuration that allows low pressure burst disks of very small diameter such as, for example, 0.25 inches in diameter, wherein the score of the rupture disk is generally circular in shape which terminates at end portions that define a hinge therebetween.

Abstract: A composite rupture disk includes a slit-slot, tension loaded disk having a plurality of circumferentially spaced radial slits (e.g. six in number) that terminate before reaching the disk center, thereby defining an uncut disk central portion which can be sized to at least partially influence the disk burst pressure. A radial strap, spot welded at each end attaches respectively at its end to the disk central portion and to the disk periphery, thereby preventing a downstream flow of the central portion upon rupture.