Abstract: The present invention relates to a plug and valve integrated cone valve pump with combined type movable and fixed three cylinders and two spiral centralizers, which is applied to suction working conditions in highly deviated well sections. It comprises three pump cylinders, which are combined type including two fixed cylinders and a dynamic cylinder, two centralizers, which are combined type including a dynamic spiral centralizer and fixed spiral centralizer, a fixed cone valve, a cylinder and plug integrated springing fixed cone valve, a fixed plunger and a movable guide rod cone valve to solve the problems such as stuck pump, eccentric wear between plunger and pump cylinder and valve leakage.

Abstract: A valve assembly for a fracturing pump includes a valve seat having a bore extending therethrough, the valve seat including a strike face at a top region opposite a bottom region, at least a portion of the strike face formed by an insert positioned within a groove formed in the valve body. The valve assembly also includes a bore liner arranged within the bore, at least a portion of an axial length of the bore liner covering at least a portion of the ceramic to form a barrier between the insert and the bore. The valve assembly further includes a valve member positioned to reciprocate within the bore, the valve member moving between an open position and a closed position, wherein at least a portion of the valve member engages at least a portion of the strike face in the closed position.

Abstract: Pressure relief valves for use in high pressure applications that may include a conical shaped plunger, a body with a conical shaped mating surface corresponding to the shape of the conical shaped plunger, and one or more sealing elements, such as a pair of O-rings, are disclosed.

Abstract: A check valve is provided for use with variable frequency drives and other applications. In one aspect, the check valve provides a poppet guided by a poppet guide in at least two locations to ensure stability between fully open and fully closed positions. In another aspect, the check valve includes a poppet guide adapted to receive a poppet in a stem receiving channel, the stem receiving channel including guide vanes engaging the poppet and auxiliary channels for self cleaning. The check valve may also include a valve seal. In one embodiment, the valve seal is an o-ring received by a poppet head, based of the poppet guide and valve seat. The valve seat and/or the base may include expansion channels to receive a portion of the valve seat during compression when the check valve is in a closed position.

Abstract: A valve device is provided for controlling air flow. The valve device includes a plug closure member having an interior chamber and a stop device positioned within the interior chamber of the plug closure member. The valve device further includes a check valve having a plate positioned adjacent an inlet opening of the plug closure member and an alignment device attached to the plate and received within a stop opening of the stop device. The check valve is movable between a closed position in which the plate limits passage of a lift air through the interior chamber and an open position in which the plate allows passage of the lift air through the interior chamber. The stop device engages the check valve in the open position.

Abstract: A poppet valve with an integrated dampener is disclosed. In some embodiments, the valve includes a poppet guide with a stem and a hollow poppet is disclosed. The hollow poppet receives the poppet guide stem therein, thereby defining an internal cavity. The poppet is movable relative to the poppet guide to adjust the volume of the internal cavity. The poppet is also moveable relative to a valve seat between a seated position and an unseated position. The poppet may include a body with a seal groove and an elastic seal disposed within the seal groove. The seal is configured to engage the valve seat prior to the poppet body when the poppet moves toward the seated position. The valve may include a poppet guide pivot system that enables pivoting of the poppet guide and the poppet relative to an axial centerline of the valve.

Abstract: A relief vent including a vent body having an opening configured to be in communication with the internal volume of a tank. The relief vent further includes a movable portion that is movable relative to the vent body. The movable portion or the vent body includes a base and a sealing member coupled thereto. At least part of the sealing member is elastically deformed to press at least a portion the sealing member against the base. The portion of the sealing member pressed against the base is positioned to sealingly engage the other one of the movable portion or the vent body.

Abstract: A system for heating liquid using solar radiation, includes a plurality of solar panels (1, 2, 3, 4, 5), at least one reservoir for heated liquid and pipes for circulating liquid between the respective solar panel and the at least one liquid reservoir, the liquid circulating by gravity circulation. The present system is characterized in that a non-return valve (17) for controlling the flow of heated liquid from the respective solar panel is placed in a portion of the circulation pipe between the upper end of the solar panel and the at least one liquid reservoir, the non-return valve (17) being adapted to open and close at a predetermined pressure in the liquid flow from the solar panel.

Abstract: The fluid delivery system includes a pressurizing device for delivering a pressurized injection fluid, a low pressure fluid delivery system, and a pressure isolation mechanism adapted for fluid communication with the pressurizing device and low pressure fluid delivery system. The pressure isolation mechanism includes a housing defining an inlet port, an isolation port, and an internal cavity. The housing defines a seal seat in the internal cavity between the inlet port and isolation port. A valve member is disposed in the internal cavity. The valve member is free floating in the internal cavity and is adapted to engage the seal seat. The valve member has an open position permitting fluid communication between the inlet port and isolation port, and is fluid flow responsive to fluid flow in the inlet port to engage the seal seat and attain a closed position preventing fluid flow between the inlet port and isolation port.

Abstract: An air admittance vent diaphragm assembly is disclosed. The assembly comprises a base, an annular retainer ring, and an annular malleable washer. The base has an annular portion and a stem extending orthogonally from the center of the annular portion. The annular retainer ring includes a circumferential skirt engaged with an outer perimeter of the annular portion of the base, with the stem extending beyond the annular retainer ring. The annular malleable washer is disposed between the annular retainer ring and the annular portion of the base.

Abstract: A oneway valve for an automatically inflatable air cushion includes a valve body having an air inlet port and an air outlet port, a valve seat mounted in the valve body and formed with a plurality of conducting holes connected to the air inlet port and the air outlet port, and a valve stem movably mounted in the air inlet port and movable to seal the conducting holes. Thus, the oneway valve prevents the air from leaking from the air cushion during the inflation process and prevents the air from entering the air cushion during the deflation process, so that the air cushion is inflated and deflated completely and exactly.

Abstract: A magnetic check valve includes a cage mountable in a fluid flow duct and supporting a plunger movable between a closed position blocking fluid flow past the valve, and an open position permitting fluid flow past the valve. One of the cage and the plunger includes a magnet, and the other of the cage and the plunger includes ferrous material magnetically attracted to the magnet to magnetically bias the plunger to the closed position.

Abstract: A flow valve having sealing member having a first condition for engaging a housing to prevent back flow and a platform for obstructing a flow passage through the flow valve with the platform supporting the sealing member in an out-of-the-way condition to allow fluid to flow through the flow valve.

Abstract: A hydraulic brake valve comprising a body, a passageway defined in the body, an inlet to the passageway, an outlet from the passageway and a movable valve member in the passageway, the valve member is movable between a first position blocking the passageway to prevent communication between the inlet and the outlet, and a second position opening the passageway to allow communication between the inlet and the outlet in response to a pressure differential exceeding a predetermined value. The valve member remains in its second position once it has been moved to its second position.

Abstract: In the check valve having a valve seat member and the valve member, the valve seat member is provided with first and second conical seats. The second conical seat is positioned upstream the first conical seat. An angle of the second conical seat to an axis of the valve member is more acute than that of the first conical seat. Since the check valve has the second conical seat, contact pressure applied to the first conical seat is uniformly dispersed and, thus, the first conical seat is less worn out. Further, the second conical seat prevents the valve member from cutting into and sticking to the valve seat member, even if the wear has been progressed. Accordingly, an operation of the check valve is stable for a longer period of time.

Abstract: A check valve comprising a casing having a flange extending circumferentially around the inner periphery of the body. The flange is constructed by first drilling from a first direction at a diameter less than the predetermined diameter and then drilling from an opposite direction at the predetermined diameter. The flange defines a valve aperture for receiving a poppet valve. The poppet valve includes a stem including a plurality of legs each having an outer peripheral surface facing the valve aperture. The outer peripheral surface of the valve legs have rounded or recessed edges such that only a center portion of the outer peripheral surface of the legs can come into contact with the inner surface defining the valve aperture.

Abstract: A bailer that is substantially leak-free includes an improved valve housing at its lowermost end. A valve body in the form of a solid or hollow hemispherical ball is mounted at the lowermost end of a straight valve stem. The hemispherical valve body seats in a valve seat that matches the contour of the hemispherical exterior surface of the valve body. The valve body has a preselected specific gravity that enables it to float on the surface of the liquid fluid being sampled when the valve body is unrestricted. The valve stem is slideably received within and guided by a central aperture formed in a central hub of a spider member that spans the hollow interior of the valve housing. The spider is supported about its periphery by an annular shoulder formed in the interior sidewalls of the valve housing. The spider is inserted into the valve housing and pressed against the annular shoulder when the bailer is assembled.

Abstract: A substantially leak-free bailer includes an improved valve assembly at its lowermost end. A valve body is mounted to the lowermost end of a valve stem and the valve stem is slideably received within and guided by a central bore formed on a support member that spans the hollow interior of the bailer at its lowermost end. The valve body may be hemispherical, frusto-conical, or elongate and downwardly tapered. The valve seat is configured to match the contour of the valve body. An annular ridge circumscribes the valve seat and serves as a barrier to particulate matter so that the valve body sits in the valve seat without interference from such particulate matter.

Abstract: A substantially leak-free bailer includes an improved valve assembly at its lowermost end. A valve body is mounted to the lowermost end of a valve stem and the valve stem is slideably received within and guided by a central bore formed on a support member that spans the hollow interior of the bailer at its lowermost end. The valve body may be hemispherical, frusto-conical, or elongate and downwardly tapered. The valve seat is configured to match the contour of the valve body. An annular ridge circumscribes the valve seat and serves as a barrier to particulate matter so that the valve body sits in the valve seat without interference from such particulate matter.

Abstract: A bailer that is substantially leak-free includes an improved valve assembly at its lowermost end. In a first embodiment, a valve body in the form of a hemispherical ball is mounted at the lowermost end of a straight valve stem. The hemispherical ball seats in a valve seat that matches the contour of the hemispherical exterior surface of the ball. In a second embodiment, the valve body and the matching valve seat are both frusto-conical in configuration. In a third embodiment, the valve body and matching valve seat are tapered downwardly to form an elongate, narrow slot. A fourth embodiment adds a guide member to the third embodiment structure to ensure seating of the downwardly tapering valve body in its valve seat. In all embodiments, the valve stem is slideably received within and guided by a central bore formed in a support member that spans the hollow interior of the lowermost end of the bailer, and the valve body is covered with a cushioned material of uniform thickness.

Abstract: A valve device for a storage tank for transporting oils or chemical compounds, includes an upper body having a V-shaped valve seat at an upper end thereof. At least one screw hole with a closing cock is provided in the upper body. A lower body connected to the upper body, has an enforcing frame forming a plurality of pathways between connection spokes. A stem having a three-stepped rod extends over the valve seat. A disc is coupled to a flange by a ring by bolts. The flange is supported by a plurality of spokes to a bush fixed to the rod. Hammering prevention discs are fixed to a middle portion of the rod as is a weight connected below the discs. Bushings are between the discs and all are hold to the rod by a lock nut. A cap having a main hole receives the bottom end of the stem rod and two more holes in the cap communicate with the hole to allow the bottom end of the rod to move in the cap.

Abstract: A two-piece check valve device comprising a rubber sealing element and a plastic carrier member. A through bore in the plastic carrier member receives the sealing element, which is formed with an annular groove in which the carrier member is removably secured. The through bore and annular groove may be correspondingly tapered to facilitate assembly and disassembly of the check valve device.

Abstract: A pressure relief valve includes a valve housing and a drop-shaped body with a conical valve surface that cooperates with a conical valve seat at an upwardly directed blow-off opening of the valve housing. The drop-shaped body is connected to a lifting disc in the housing. The inner configuration of the housing provides an annular passage around the lifting disc which is smaller in area when the lifting disc (and drop-shaped body) is in its uppermost, fully open positioning as compared to its lowermost, closed positioning.