Abstract: A valve assembly for a fracturing pump includes a valve seat having a bore, the valve seat having an upper region forming at least a portion of a strike face. The valve assembly also includes a groove and a valve seat insert positioned within the bore. The valve seat insert includes a body portion extending at least a portion of a bore length. The valve seat insert also includes an insert bore extending through the body portion. The valve seat insert further includes an upper insert region, at least a portion of the upper insert region positioned within the groove. The valve assembly also includes a valve member positioned to reciprocate within the bore, the valve member moving between an open position and a closed position.

Abstract: Example aspects of a stent spring for repairing a pipe and a method for retaining a stent in a compressed configuration is disclosed. The stent spring for repairing a pipe can comprise a substantially tubular mesh structure defining a void, the void defining a central axis, the mesh structure comprising one or more strands, the one or more strands defining a plurality of openings, wherein the stent spring is configurable in an expanded stent spring configuration and a compressed stent spring configuration; and a tab extending radially inward from the mesh structure into the void, the tab defining a tab opening.

Abstract: A helical strake pole system that includes a tubular pole having a longitudinal axis and threaded attachment points. The system further includes a helical strake fin disposed circumferentially around a portion of the tubular pole along the longitudinal axis. The system further includes couplers disposed on the tubular pole. The couplers are configured such that each coupler has a first portion with a slot configured to receive an upper portion of the helical strake fin and a second portion configured to removably coupled to a threaded attachment point of the tubular pole. In addition, each coupler is configured to position a portion of the helical strake fin substantially perpendicular to a surface of the tubular pole.

Abstract: A mechanical lock unit with a shaft lock assembly and method of achieving a self-lock mode for, e.g., hydraulically activated isolation plug module. The shaft lock assembly includes a teeth-form ring that surrounds a shaft. The teeth-form ring defines a plurality of teeth. A teeth-form split gripper assembly is positioned to surround the teeth-form ring. The teeth-form split gripper assembly has at least a first teeth-form split gripper and a second teeth-form split gripper with a spring therebetween for biasing the first teeth-form split gripper away from said second teeth-form split gripper. The first teeth-form split gripper and the second teeth form split gripper having an inner surface that defines a plurality of teeth for cooperative engagement with the plurality of teeth of the teeth-form ring.

Abstract: A support tool for leakage repair of an inspection well includes: a curved loading plate having multiple grouting holes thereon, a telescopic adjustment device, and a base; wherein: one end of the telescopic adjustment device is connected to an inner side face of the curved loading plate, and the other end of the telescopic adjustment device is connected to the base; the telescopic adjustment device adjusts a distance between the curved loading plate and the base. The support tool is firstly hoisted at a leakage position of the inspection well; then a telescopic length of the telescopic adjustment device is adjusted, so that the curved loading plate and the base are in a close contact with opposite sides of the inspection well wall; and a grouting system is used to inject a double-slurry quick-setting repair material into a grouting pipe on the curved loading plate for plugging leakage.

Abstract: There is provided a damper unit that allows a plurality of damper bodies to be installed by simple work. The damper unit includes at least two damper bodies that are installed in a housing space so as to be stacked and include hermetically sealed spaces therein. The damper unit further an elastic member 7 that is disposed between the damper bodies, and a stopper that is installed across outer peripheral edge portions of the damper bodies positioned at both ends.

Abstract: A charging inlet for an electric vehicle (EV) includes a body defining a socket housing a conductive charging terminal, and a flange extending from the body and defining an interior channel in fluid communication with the socket. A valve assembly of the inlet includes a cap or adapter body removably attachable to the flange. The cap defines an interior space in communication with the interior channel of the flange with the cap attached to the flange. The valve assembly further includes at least one sealing valve, such as an umbrella valve, attached to an exterior of the cap and adapted to permit the passage of fluid from the interior space of the cap to an external environment.

Abstract: A metal braided hose includes: an inner tube including an elastic material; a first metal wire braided layer enveloping an outer surface of the inner tube; and a second metal wire braided layer enveloping the first metal wire braided layer. A wire thickness of the second metal wire braided layer is smaller than a wire thickness of the first metal wire braided layer.

Abstract: A high-pressure hose includes: an internal rubber layer; an external rubber layer; reinforcement layers having even number of layers, two or more of the reinforcement layers are provided between the internal rubber layer (10) and the external rubber layer (20), a plurality of reinforcement wires (41a to 44a) are wound around the reinforcement layers in a spiral shape such that winding directions of the reinforcement wires (41a to 44a) alternate; and intermediate rubber layers (51 to 54), each of which is disposed between the reinforcement layers (41 to 44) having even number of layers. A same winding angle (?) is set for the reinforcement wires (41a to 44a) in all levels of the reinforcement layers (41 to 44) having even number of layers, and a winding pitch (P) of the reinforcement wires (41a to 44a) in the reinforcement layers (41 to 44) having even number of layers is set to increase in an order from a side of the internal rubber layer (10) to a side of the external rubber layer (20).

Abstract: A fire-rated ventilation duct system and improvements therein.

Abstract: A decompression heat-insulating pipe structure that can exhibit the desired heat-insulating performance and is easy to assemble. In the structure, a space between ends of inner and outer tubes is decompressed. The outer tube includes a first flange, which extends radially inward from an axially one end thereof, and a second flange, which extends radially outward from the axially other end thereof. The inner tube includes a third flange, which extends radially inward from an axially one end thereof and is opposed to the first flange at an axially inward position of the first flange, and a fourth flange, which extends radially outward from the axially other end thereof and being opposed to the second flange at an axially outward position of the second flange. First and second elastic seal members are disposed between the first and third flanges and between the second and fourth flanges, respectively.

Abstract: An example control valve includes a split valve body. The split valve body includes a first body portion, a second body portion, a flow path, an inlet port, and an outlet port. The flow path passes through the first body portion and the second body portion. The first body portion is coupled to the second body portion. The control valve also includes a valve seat. The valve seat is disposed between the first body portion and the second body portion. The control valve also includes a valve plug. The valve plug is movable relative to the valve seat to control fluid flow through the control valve.

Abstract: A segmental tube section structure having a length and a circumference, the segmental tube section structure including a plurality of tube segments extending the length in a longitudinal direction of the segmental tube section structure and extending in a circumferential direction of the segmental tube section structure, wherein each tube segment of the plurality of tube segments extends in the circumferential direction to span an equal arc of the circumference of the segmental tube section, and wherein each of the plurality of tube segments are connected to adjacent tube segments of the plurality of tube segments in the circumferential direction to form the segmental tube section structure.

Abstract: A fluid flow control device serving as an inflow port from a fluid reservoir (R) to the interior of a production pipe (S) is in the form of a housing (3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l). The housing has a primary flow path (18) and a secondary flow path (19). The secondary flow path is in fluid communication with a chamber (B) in which is arranged an actuator (5) for a valve device (4), the valve device arranged to open and close the primary flow path. At least one flow restrictor (1,2) is arranged in the secondary flow path, the flow restrictor arranged to provide a pressure to chamber (B) sufficient to actuate the valve to an open position when the fluid flowing through the secondary flow path is oil, and a pressure sufficient to actuate the valve to a closed position when the fluid has a viscosity and/or density less than oil.

Abstract: An anti-rat flap member for sewer/draining pipe check is removably attached to the valve body. The valve body defines an interior volume therein which is preferably substantially open and unobstructed (except for the flap member). The flap member acts both as a seal to prevent the back-flow of sewage/drainage water and is normally in a closed position to prevent the passage of rats. The flap member comprises a row of sharp projections attached by known means (such as integrally molded, glued, rivetted or screwed) to the outermost side of the flap member facing the downstream section of the valve. The projections must be at an angle to the surface of the sheet, preferably at an angle which will prevent the rodent from gnawing and biting or even lifting the flap member with their mouth.

Abstract: A flexible pipe body and a method of providing electrical continuity are disclosed. The flexible pipe body comprises a first armour layer formed from a helical winding of a metal tape element, a further armour layer formed from a helical winding of a further metal tape element, and at least one intermediate layer between the first and further armour layers, said intermediate layer comprising a helically wound electrically insulating tape element (8000, 8001, 8002, 8003, 8004) and a helically wound electrically conductive tape element (8100, 8101, 8102, 8103, 8104).

Abstract: A swimming pool leveling system includes a bracket extending from a first end to a second end, the bracket having openings; a float valve having a body with a float positioned within an interior of the body, the float valve engaged with the bracket via an adjustment device; a pressure reducing valve engaged with the body and to receive a water source; and a base having a base body with an enclosed interior accessible via an opening, the enclosed interior configured to receive a weight, the base engaging with the bracket via one or more securement devices; the base is to rest on a surface such that the bracket extends the float valve into a pool; and the float valve to allow filling of the pool to a desired height.

Abstract: The rigid hose for wet dry vacuum is configured for use with the hose of a domestic appliance. The rigid hose for wet dry vacuum is a protective structure. The rigid hose for wet dry vacuum protects the hose. The rigid hose for wet dry vacuum sets the hose in a fixed position such that the curvature of the center axis of the prism structure of the hose will not shift during use of the hose. The rigid hose for wet dry vacuum comprises a bimodal shell. The bimodal shell is a bimodal flexible structure.

Abstract: A duct includes: a tube that is formed to extend from an indoor of a building or a movable body and that allows an outside and the indoor to communicate with each other; an electromagnetic wave inhibiting sloped surface that is formed on an inner surface of the tube and extends to be sloped to approach an axial line of the tube from the outside toward the indoor in an axial direction of the tube and that reflects an electromagnetic wave; and an electromagnetic wave selecting inner peripheral member that has a tubular shape covering the electromagnetic wave inhibiting sloped surface from an inner peripheral side and is capable of selectively transmitting only an electromagnetic wave of a specific frequency incident on the tube.

Abstract: A pilot-operated pressure relief valve nozzle assembly and associated systems and methods are provided. In an exemplary embodiment, the nozzle assembly includes a body having an elongate shaft with an inner lumen extending therein and a flange at one end of the elongate shaft and having an annular notch formed therein. The annular notch is configured to seat an annular ring, and the annular notch includes an annular groove formed therein that enables communication between a first bore extending through the flange from the inner lumen to the annular groove and a second bore extending through the annular ring, thus allow the first and second bores to be radially offset from one another.