Abstract: A control valve has a plurality of internal flow channels operative for reducing the pressure and attenuating the noise of pressurized fluids being conveyed along a pipe line. An entrance well within the valve minimizes excess turbulence.

Abstract: A tubular metal sleeve having two annular welding end collars and a flexible intermediate sleeve portion between the collars is mounted in a bore of a housing. The sleeve permits passage of high temperature pressurized fluids impervious to the sleeve. The sleeve forms part of a gauge for detecting the pressure of the fluid. A spacer may be mounted in a space formed between the sleeve and the housing to reduce the quantity of pressure-transmitting liquid required to fill the space.

Abstract: A tide gate valve has staggered pads embedded therein to provide sufficient strength to resist sagging and inversion, and to provide sufficient flexibility to promote an easy opening of the valve.

Abstract: An inversion-resistant tide gate valve includes a multiple-ply sleeve, and a rigid support member embedded therein to prevent the sleeve from sagging and to impart strength to the sleeve to prevent inversion.

Abstract: An isolation fluid pressure detector includes a housing which bounds an internal bore and a recess situated at the axially central region of the bore and extending radially outwardly of the bore over the entire circumference of the same. A flexible sleeve-shaped element is received in the bore and includes a flexible intermediate portion which spans the recess, and two end portions which extend to a considerable distance from the flexible portion along the surface bounding the bore. The sleeve-shaped element has external arms which axially bound a confining space in the recess and are confined between end portions and an intermediate portion of the housing to seal such interfaces. A pressure gauge detects the pressure prevailing in the confining space through a measuring port of the housing.

Abstract: A deformable sleeve for a pinch valve includes an inner tubular body of elastically deformable material which is provided with flanges at its axial ends, and a mesh element having a tubular portion which surrounds the tubular body between the flanges and prevents the same from bulging out under the influence of internal pressure. The mesh element further has anchoring portions which are anchored to the flanges. The anchoring portions can either be connected to the faces of the flanges which face one another, or embedded in the material of the flanges, either directly, or by being connected, such as clamped between or welded to, anchoring rings which are embedded in the material of the flanges. The anchoring rings may be polygonal, especially rectangular or L-shaped in radial section, or circular or similarly curved in radial section. The mesh element may advantageously be of stainless steel mesh.

Abstract: A tide gate check valve in which at least three converging sides are provided at a tapered region of a flexible sleeve, so that on reverse back pressure build-up of fluid, reverse fluid flow is prevented, while the valve sleeve does not invert or collapse. The present configuration features embedded reinforcing elements for resisting inversion or collapsing when the back pressure builds up. This feature is especially important for large-sized conduits of 36" or 72" diameter, or even larger, such as are common in storm sewer applications.

Abstract: A pinch valve sleeve for reducing the pressure of fluid flowing therethrough with or without actuation of the valve's pinching mechanism. The valve sleeve features an elongated hollow flexible resilient elastomeric sleeve body having an inner surface circumferentially bounding a flow-through passage and peripheral flanges at both ends suitable for attachment to a section of a pipeline or conduit system. The sleeve body has an ingress section adjacent to the inlet opening of the valve sleeve, an egress section at the outlet opening which permits fluid egress, and a pinchable intermediate section situated between the ingress and egress sections. The inner surface of the sleeve body has thereon a plurality of radially-extending, inwardly-directed protrusions operative for impeding fluid flow through the flow-through passage of the sleeve, thus reducing the pressure so that the pressure of the fluid which exits through the outlet opening is lower than the pressure of the fluid entering the inlet opening.

Abstract: An improved pinch valve construction which curtails and prevents end leakage where the valve is joined between two sections of duct or conduit; the valve is especially adapted for usage in large-sized piping such as ducts or conduits having diameters from 8 to 12 feet which carry bulk fluids such as drinking water, raw sewage, etc. The pinch valve configuration has end fittings which are a combination of elements including a clamping ring, which permit the easy fabrication and assembly of the valve components and eliminate the need for costly tooling and castings; standard sized components can be used. The present pinch valve construction is cheaper and better than prior art pinch valves, being less susceptible to leakage, and is readily installed and repaired. Positive control and modulation of fluid flow is attained, and the overlapping ends of the pinch valve members, which straddle the ends of the duct or conduit, assure a strong and fluid-impervious joint.

Abstract: An improved pinch valve construction comprises a pair of pinch bars spaced apart of each other, and a valve sleeve intermediate the pinch bars and having wall portions bounding a flow-through passage. A flow-control device moves the pinch bars towards and away from each other and is operative for urging the sleeve from an open configuration in which the wall portions are spaced apart at a pre-determined distance to thereby permit flow through the passage, towards a flattened configuration in which the wall portions are spaced at a distance less than the predetermined distance to thereby restrict flow through the passage. A restoring device urges the sleeve from the flattened configuration towards the open configuration, whereby any tendency of the sleeve to remain in the flattened configuration when the pinch bars are moved away from each other is counteracted.

Abstract: An improved pinch valve construction wherein the pinch valve sleeve can be removed as required while the pinch valve construction is connected to mating pipe with there being no leakage of the fluid to the environment.