摘要:
Piston valve (10) with a hollow housing (13), an inlet (11) and an outlet (12) communicating with the inlet only through the piston valve, and a pushbutton (27) that can be moved in and out direction of the housing, wherein the two positions of the pushbutton set the closed respectively open states of the piston valve that comprises furthermore a valve piston (17) arranged in the interior of the housing and guided for axial displacement, a valve seat (14) provided on a transversely arranged element, wherein when the valve piston is pressed to the valve seat the piston valve is in closed state, and the inlet is led through a passage (16) into the inner cavity of the housing so that in the closed state of the valve piston a lower portion of the valve piston closes the passage. A control valve (30) is also arranged in the inner cavity of the housing spaced axially from the valve seat, and the opening and closing of the control valve is controlled by the position of the pushbutton, and in the interior of the housing between the valve piston and the control valve an intermediate space (34) is formed and the size of the intermediate space depends on the momentary position of the valve piston, and a shunt flow passage is provided between the two end faces of the valve piston providing a small fluid flow.
摘要:
A device for controlling flow of a flow agent in a pipe system, the device comprising: a pipe housing (1) comprising a pipe cavity (2) with one or multiple openings in a pipe cavity wall of the pipe cavity, the one or multiple openings defining an outlet port (3) of the device, and the pipe cavity having an open end defining an inlet port (6) of the device, and a closed end (7), wherein the closed end is closed by a dismountable end body (15); the pipe cavity comprising a first portion having a first cross sectional area and a second portion having a reduced cross sectional area (4), smaller than the first cross-sectional area, the second portion being located between the open end and the one or multiple openings in the pipe cavity wall; one end of the second portion defining a seat surface of a valve seat (5) defining an opening to said second portion; and a spool body (9) located in the pipe cavity movable between a closed position and an open position, where the spool body in its closed position forms a seal to the seat surface, wherein the spool body may be removed from the pipe cavity through when the end body is dismounted from the device so as to provide an opening to the pipe cavity.
摘要:
A relief valve assembly is provided for use in connection with high pressure and ultrahigh pressure pumps. The relief valve assembly includes a valve pin having an engagement portion with a tapered surface and a valve seat having a valve pin receiving aperture defining a tapered surface on the valve seat to sealingly mate with the engagement portion of the valve pin when the valve pin is seated against the valve seat in a seated configuration. The valve seat further includes at least one bypass passage that extends from the valve pin receiving aperture to an exterior surface of the valve seat such that when the valve pin is displaced away from the seated configuration fluid can pass through the bypass passage and an annular space created between the engagement portion of the valve pin and the valve seat. Systems incorporating the relief valve assembly are also provided.
摘要:
Disclosed is an apparatus, method and system comprising one or more devices capable of modulating fluid flow, the fluid being a liquid or a gas resulting in a pressure fluctuation in a fluid flowing within a flow channel, comprising: a flow modulating device that acts as a servo valve such that the device comprises a shaft and a moveable actuator that slides along the shaft, wherein the shaft and the actuator are positioned at any angle within a principal fluid flow channel such that the fluid flows through the principal fluid flow channel. The fluid flowing within the principal fluid flow channel is selectively reversible and the fluid is connected to both an inner pilot flow channel and the principal fluid flow channel wherein the flow modulating device includes a particulate barrier system having at least one seal system comprising an upper outer seal and a lower outer seal prohibiting fluid particulates from entering the inner pilot flow channel and also includes an upper inner seal and a lower inner seal that further prohibit residual particulates from reaching any mating surface between the shaft of the flow modulating device and the upper seal, the upper inner seal, the lower outer seal, and the lower inner seal. The particulate barrier system operates in a fluid flow field wherein the fluid can flow in any direction and utilizes a sealing system wherein an upper outer seal and a lower outer seal prohibit particulates from reaching the respective surfaces of an upper inner seal and lower inner seal of the flow modulating device. An upper inner seal and lower inner seal further prohibit residual particulates from reaching surfaces between the seal and that of the shaft of the flow modulating device.
摘要:
A device has been disclosed that may include a spool valve including a body having a first connector and a second connector and a spool movable relative to the body for controlling flow between the first connector and the second connector. The reversible flow control assembly further may include a pilot valve device developing a single pressure command in the form of a fluid at a command pressure. The spool valve may be responsive to the single pressure command developed in said pilot valve device to control flow between the first connector and the second connector without regard to the direction of flow. The majority of axial forces acting on the spool to position the spool relative to the body when fluid is flowing through the valve may be fluid forces.
摘要:
Die Erfindung betrifft eine hydraulische Ventilvorrichtung mit einem Ventilgehäuse (10), in dem ein Ansteuerkolben (16) verfahrbar geführt ist, der von einer Betätigungseinrichtung (18) betätigbar ein Pilotventil (20) ansteuert, mittels dessen ein Fluidanschluss (T) im Ventilgehäuse (10) mit einem Fluidraum (22) eines Sperrkolbens (24) verbindbar ist, der mindestens eine fluidführende Verbindungsleitung (1, 2) der Ventilvorrichtung ansteuert und eine fluidführende Steuerleitung (26) aufweist, die von der Verbindungsleitung (1, 2) in den Fluidraum (22) des Sperrkolbens (24) mündet.
摘要:
A valve device (1) including a fluid inlet (4), a fluid outlet (5), a valve seat (6), a valve member (3) movable relative to a valve seat (6), a control chamber (12), the volume of the chamber being variable depending on the position of said valve member (3), a fluid passageway (7) formed in said valve member (3), providing fluid communication between said fluid inlet (4) and said control chamber (12), a flow control element (8) provided in said fluid passageway (7) such that only a small flow rate is permitted to flow in said fluid passageway, a relief port (9) providing fluid communication between said control chamber (12) and either said fluid outlet (5) or an external outlet, and, a control means to control the position of said valve member (3), either directly or indirectly, and to thereby control the operating of said valve device (1), the control means including a plunger (2) selectively actuated by a solenoid (10).
摘要:
Die Erfindung betrifft ein Ventil mit einem vorsteuernden magnetischen oder magnetisierbaren Vorsteuerventilglied und einem Hauptventilglied eines in einer Holzbearbeitungsmaschine verwendeten Vakuumsystems, wobei die Holzbearbeitungsmaschine einen mit mindestens einer Vakuumzone durchzogenen Spanntisch aufweist, der zwischen Vakuum führenden Kanälen und der Spanntischoberfläche mindestens eine dieses unter der Spanntischoberfläche sitzende Ventil aufnehmende Bohrung hat, wobei auf oder am Spanntisch ein das Werkstück tragender Saugadapter angeordnet ist, der in seiner der Spanntischoberfläche zugewandten Seite zumindest bereichsweise aus einem Werkstoff oder einer Vorrichtung besteht, der oder die das im unbetätigten Zustand geschlossene Ventil durch magnetische Wechselwirkung öffnet und dadurch den Saugadapter auf den Spanntisch und/oder das Werkstück auf den Saugadapter saugt. Mit der vorliegenden Erfindung wird ein Ventil entwickelt, das ein Öffnen bei anliegendem Unterdruck ermöglicht, bei unbeabsichtigtem Druckanstieg schnell schließt und in allen Betriebssituationen eine sichere Funktion gewährleist.
摘要:
A fluid device driven solely by input fluid to reciprocate a driven member in the device. The device is readily attached to a normal or special fluid supply system. The device can produce a pulsating fluid output that may be used for cleaning, especially for cleaning around and between teeth, as well as for cleaning and massaging gums. The device includes a main fluid flow path between the inlet and the outlet to drive an actuating apparatus and to transfer most of the input fluid out through the outlet. The actuating apparatus includes a driven member (66), a control system, and a drive system. The drive system includes a fluid drive port and a biasing system (88) for providing the driving force to reciprocally drive the driven member (66) and for aiding cyclic movement of the driven member. The biasing system may be a compression air chamber (88) and the control system may be a drip valve system (79).
摘要:
The invention provides a valve assembly (10) suitable for, although not limited to, use in a Pre-Charged Pneumatic airgun which includes a barrel (12), a plenum (14), and a trigger mechanism. The valve assembly (10) comprises a valve (16) including a valve body (18) terminating at one end in a valve face (20) and at an opposite end in a valve base (22); an end cap (26) located at one end of the valve (16) such that the valve (16) is slidingly displaceable relative to the end cap (26); a pressure chamber (28) defined between the valve base (22) and the end cap (26); an air flow channel (24) extending between the plenum (14) and the pressure chamber (28) for guiding pressurized air from the plenum (14) to the valve base (22); and a velocity -adjustment screw (30) located in the air flow channel (24) for adjusting air flow from the plenum (14) to the pressure chamber (28).