Abstract: A gate valve having a valve body, a valve rod, a regulation device, a cam mechanism and a drive for supplying a straight-move force to the cam mechanism is provided. The valve rod is held so that it can move in a straight-move direction of opening and closing the valve via a pair of linear guides provided on both sides of the valve rod.

Abstract: A center core laminated part and a side core laminated part are formed separately from each other. The center core laminated part is integrated with the side core laminated part by engaging depressed engaging portions with projected engaging portions, wherein the depressed engaging portions and the projected engaging portions are formed relatively on the corresponding opposite surfaces, to form a laminated core part for forming a magnetic path.

Abstract: A valve for regulating fluids includes a piezo-electric actor unit (9) for operating a valve member assembly. The valve member assembly has at least one first piston (13) guided in a valve body (10) and a second piston (14). A hydraulic chamber, acting as a hydraulic converter, is disposed between the first and second pistons (13, 14). The second piston operates a valve-closing member (15) disposed on an end facing away from the hydraulic chamber (16). The valve closing member (15) cooperates with at least one valve seat (17) formed on the valve body (10) and in a closed position, separates a system pressure region (18) of the valve (1) from a high pressure region (5). The second piston (14) is surrounded by and supported by an approximately casing-type spacer (22) on the valve body (10).

Abstract: The microvalve comprises a drive housing (3) in which a magnetic drive is arranged that includes a solenoid (1) and an armature (6) adapted to be actuated by the solenoid. A flanged housing (2) in which two valve seats (10a, 10b) are formed is mounted against the drive housing. Arranged between the drive housing (3) and the flanged housing (2) is a diaphragm (5) which is adapted to be pressed against the valve seats by means of a commutation rocker (4) coupled to the armature. The commutation rocker (4) has a pivot bearing, the axis (13) of which, for avoiding tolerances, assumes a position which is determined by direct abutment on a seating surface of the flanged housing (2) facing the drive housing (3).

Abstract: The invention provides a gate valve comprising a wedge-shaped gate 10 movable into a passageway 11 to seal the passageway, the wedge-shaped gate having first and second sides 13, 14 and a butt region 24, the first and second sides converging towards the butt region, the first side having a perimeter seal 20 facing upstream, the second side having a perimeter seal 21 facing downstream, each perimeter seal merging into a butt end seal 22, 23 for sealing against a face of the passageway, opposed to the butt end, there thus being two butt seals 22, 23 spaced apart with respect to the axis of the passageway, the wedge-shaped gate 10 having a concavity 18, 19 within each perimeter seal to reduce the weight of the gate, the seals being coated with resilient material and the geometry of the valve being such that although the butt end seals 22, 23 undergo a substantially greater degree of compression than the perimeter seals, for a given movement of the gate, the final degree of compression of all the seals, when the

Abstract: A valve (100) for controlling gas flow for a gas heating which allows, as different embodiments, (1) A gradual and smooth transition from high flow to low flow. This is achieved by a rotatable control means (108) wherein the valve body or control means has a taping groove (134) on an annular path intersecting with a port to allow variation in flow rate as the control means rotates. (2) The ganging together into modular form of several valve units with the inlet ports forming a common inlet manifold. (3) The control means, at least, is a plastic, eg nylon. (4) The switching to off from either high or low flow is allowed. But the switching from off to on is directly to high flow.

Abstract: The invention relates to an exhaust gas control valve with a first valve part (14) and a second valve part (44), which rest on one another with one side (17, 46), the valve parts (14, 44) in each case having passages (14, 45) and being rotatable relative to one another between an open position permitting the passage of exhaust gases and a closed position, blocking this passage. Webs (21 to 23), which protrude on one axial side of the first valve part (14), surround the openings (15) and, with their free narrow surfaces, form supporting surfaces for the second valve part (44), which is constructed flat on its side (46) facing the first valve part (14) and essentially rests with this surface on the narrow surfaces of the webs (21 to 23) and slides during the relative rotational adjustment, extend along the boundary edges (18 to 20), surrounding the passages (15, 45) of the first valve part (14).

Abstract: A valve for bringing gaseous fuel into the combustion chamber of gas engines is provided with a solenoid valve (8) controlling fuel delivery (7) and an adjoining poppet valve (2), which closes biased by the force of a spring, and which opens in the direction of the combustion chamber through the pressure of in-flowing gas. For the purpose of keeping the poppet valve (2) open, independent from the pressure conditions at its valve head (3), the valve's stem (4) is connected to a step piston (6) whose topside and bottom side are biased by the fuel pressure existing between the solenoid valve (8) and the valve head (3) and whose step area (12) is in communication with the fuel delivery line (7), on one side, and with the space (11) between the step piston (6) and the valve head (3), on the other side, whereby the passageways (15, 15′, 17, 17′) are opened and closed by means of a respective switching member (13, 14, 20) corresponding to the movement of the step piston (6).

Abstract: A valve assembly HAS an element movable in a mechanical journal arrangement relative to a valve opening to establish an opening position of a valve, and A control unit for controlling the application of an oscillatory electromagnetic force to the element (8) having an known peak amplitude to cause the element to execute a sympathetic oscillatory motion as a friction reducing maneuver. The control unit is adapted to control the peak amplitude of the oscillatory electromagnetic force to sequentially apply a number of different peak amplitudes, each during a different measurement period. A monitor detects changes in the opening position of the valve during each of the measurement periods and provides a measure thereof. A processor is connected to the control unit and to the monitor to determine a working amplitude of the oscillatory electromagnetic force at which the detected changes will be minimized and to supply the determined working amplitude to the control unit.

Abstract: Fluid valves suitable for manufacture as a miniature poppet valve assembly. The valves include an upper pole piece, a lower pole piece and an armature, all formed of magnetic material. The upper and lower pole pieces are permanently joined such as by a press fit to entrap an electromagnetic actuator coil and form the magnetic circuit for a moveable armature assembled therein. A valve seat member is molded to, presses, snaps or barbs onto the lower pole piece entrapping the armature and armature return spring to complete the assembly. Use of intended permanent assemblies and use of the parts of the magnetic circuit as the valve outer housing or case allows realization of valves in relatively smaller sizes and capable of relatively higher speeds and frequencies of operation than could be practically provided using valves of other designs or using other assembly techniques.

Abstract: A shut-off device (1) includes a housing (2) and a butterfly valve (4). The butterfly valve (4) can be swivelled using a drive shaft (3). When the butterfly valve (4) is closed, the butterfly valve (4) is sealed off from the housing (2) and from the pipe connection by an annular seal (7). The annular seal (7) is held on a face (5) of the housing (2) by a backup ring (6). The annular seal (7) is attached to the backup ring (6) using two annular projections (11, 12). The two annular projections (11, 12), respectively, interface with annular grooves (13, 14) provided on the backup ring (6). A fluid pressure chamber (22) is formed between the backup ring (6) and the annular seal (7), and a fluid connection pipe (24) extends through the backup ring (6) into the fluid pressure chamber (22).

Abstract: An electromagnetic valve device reduces wear of a moving member and a non-magnetic member sliding against the moving member and prevents contamination from contacting the sliding part. The moving member is directly and movably supported in a reciprocating manner by a non-magnetic cup. The moving member has a hard layer made of nickel containing PTFE (polytetrafluoroethylene) particles at the sliding part located against the cup. The hardness of the hard layer is high and is approximately the hardness of the stainless steel cup. Therefore, the wear of both the moving member and the cup can be reduced. The hard layer contains the PTFE particles, and therefore the sliding part between the moving member and the cup is lubricated by the PTFE, which reduces the sliding resistance at the sliding part and improves the responsiveness of the device.

Abstract: The valve 10 includes a valve main body 11 having an opening 11A and forming a space which creates a part of a gas flow path, a first valve member 12, provided in the valve main body, for opening/closing the opening 11A, and a drive mechanism 40 for moving the first valve member 12 between a close position where the opening 11A is closed and an open position where the opening 11A is opened, wherein the drive mechanism 40 has a rod 14 to be reciprocated, an end of the rod 14 extends into the valve main body 11 through a through hole 11B formed in the valve main body 11 to be connected to the first valve member 12, the first valve member 12 is moved between the close position and the open position as the rod 14 is driven reciprocated, and the valve further comprising a sealing mechanism 15, which communicates into the valve main body 11 via the through hole 11B, for isolating the drive mechanism 40 side air-tightly from the valve main body, and a second valve member 17, provided on the rod 14 to move together w

Abstract: A combination face and plug seal for use in a balanced pressure valve having a valve housing and a valve plug movable within the valve housing between an open position and a closed position. The seal comprises a main body portion and an engagement portion integrally connected to the main body portion. The seal further comprises at least one primary spring which extends along and at least partially between the main body and engagement portions. Integrally connected to the main body portion is at least one seal leg portion, with at least one secondary spring extending along and at least partially between the main body and seal leg portions. The seal is adapted to be retained within the valve housing, with the engagement portion being forced into sealed engagement with the valve plug and the seal leg portion being forced into sealed engagement with the valve housing when the valve plug is closed or moved from the closed position toward the open position.

Abstract: A flow control system and a valve for controlling a fluid flow in a flexible conduit. The valve includes a movable member movable to compressingly contact the outer surface of the flexible conduit to adjust the flow cross-sectional area of the flexible conduit. The flow control system includes the flexible conduit, the valve, and a controller. The controller is operatively connected to the movable member for controllably moving the movable member.

Abstract: An annular sealing device having a positive stop to prevent over pressurization on the sealing device. The annular sealing device includes a substantially rigid support member having at least one substantially flat outer surface portion. There is a generally round cavity formed in the substantially rigid support member adjacent the at least one substantially flat outer surface. This generally round cavity has a first predetermined diameter and a predetermined depth. A generally round elastomeric sealing member having a predetermined thickness and a second predetermined diameter is disposed in the generally round cavity. Elastomeric sealing member has a substantially flat face engageable with a predetermined surface to be sealed. A stop means is engageable with at least a portion of the substantially flat outer surface portion of the substantially rigid support member for preventing undue penetration of the surface to be sealed into the generally round elastomeric sealing member.

Abstract: A solenoid actuator for an exhaust gas recirculation valve assembly including a resiliently-deformable element, for example, an undulated washer, disposed between the closed end of an armature guide tube and an axial face of the primary pole piece. The resilience of the element is selected to prevent sliding of the guide tube within the pole piece due to frictional drag on the tube by an armature; to absorb and store kinetic energy transferred by the armature impacting the closed end of the guide tube; and to reduce hysteresis by returning stored energy to assist the armature in accelerating in the reverse direction. The element may take any of several forms.

Abstract: A method and apparatus for attaching a valve to another device such as a device, such as a device for separating a solid from a liquid. A valve seat according to the present invention is friction fitted into an orifice defined by the device and a conduit is attached to the valve seat via a removable spline.

Abstract: The hydraulic control device for accommodating electromagnetic actuators and hydraulic valves, which is inserted in an automatic transmission for a motor vehicle, has at least one seal which is made of an aluminum support which has a thickness in the range of from 1 to 2 mm and is coated with a material at least on one side; the material, having a layer thickness in the range of from 100 to 180 &mgr;m, has a hardness in the range of from 20 to 120 Shore A and on its free surface is provided with a profiling having a depth in the range of from 20 to 50 &mgr;m.

Abstract: The valve (10) has a seat valve (27) comprising a hollow cone-shaped valve seat (24) and an hemispherical shutoff element (26). An afflux bore (23) having contact with a pressure-medium inlet (19) discharges centrically into the valve seat (24). A solenoid armature (30) acting upon the seat valve (27) in opening fashion grips a push rod (25) comprising the shutoff element (26). The solenoid armature cooperates with a pole body (42) according to the flat-type armature principle. A preloaded return spring (39) acting on the seat valve (27) in closing fashion is arranged between the pole body (42) and the solenoid armature (30).