摘要:
The invention relates to a valve, in particular a servo valve, with a valve seat (2) closable by a closing element (3), and a pilot valve (20), by means of which the closing element (3) can be switched between an opening and a closing position, the pilot valve (20) having a pivotally mounted lever (30) for switching the closing element (3). Another subject matter of the invention is a method for switching a valve (1), in particular a servo valve, using a valve seat (2) closable by a closing element (3) and a pilot valve (20), by means of which the closing element (3) can be switched between an opening and a closing position, the pilot valve (20) being switched by means of a pivotally mounted lever (30).
摘要:
A main valve body 10 is provided in a housing 3 included in a solenoid on-off valve 1. A pilot passage 18 is formed on the main valve body 10, and a pilot valve body 11 is inserted into the pilot passage 18 so as to open and close the pilot passage 18. The pilot valve body 11 and the main valve body 10 move in accordance with the movement of a plunger 12 which is movable in an opening direction. The plunger 12 and the pilot valve body 11 are coupled to each other by a coupling pin 28 inserted through the plunger 12 and the pilot valve body 11. The coupling pin 28 is provided so as to be displaceable relative to the pilot valve body 11. When the main valve body 10 is pushed in the opening direction and before the coupling pin 28 contacts the pilot valve body 11, the plunger 12 stops the movement of the main valve body 10 relative to the plunger 12 in the opening direction. With this, it is possible to provide the solenoid on-off valve capable of preventing a shear force from acting on the coupling pin when the valve port is opened by pushing the main valve body.
摘要:
The electromechanical regulator for passenger oxygen is a hybrid oxygen regulator that provides for electronic or mechanical regulation of oxygen flow. The electronic portion of the regulator consists of an inlet solenoid valve, an outlet solenoid valve, a cabin pressure transducer, a regulated output transducer and a PID based controller, and the solenoid valves are normally biased so that in the event of an electronic system failure or a power supply failure the system will automatically revert to mechanical operation.
摘要:
A system for manually overriding a solenoid operated valve 110 in an event of power failure is provided. The system includes a solenoid operated valve 110 and a lifter 300. The solenoid operated valve 110 includes a valve body 120 including a sealing surface 112, a fluid inlet 121 and a fluid outlet 122 , a sealing element 111 selectively separating the fluid inlet 121 from the fluid outlet 122 and a solenoid 113 configured to selectively couple and decouple the sealing element 111 to the sealing surface 112. The lifter 300 is threadedly coupled to the solenoid operated valve 110. Rotation of the lifter 300 relative to the valve body 120 in a first direction causes the lifter 300 to decouple the sealing element 111 from the sealing surface 112.
摘要:
A damping valve includes a valve seat member, a valve body, a back-pressure chamber, a pilot passage, and a pilot valve, wherein the pilot valve has a pilot valve seat member and a pilot valve body, the pilot valve seat member having an cylindrical valve container provided with a penetrating hole connecting the inside and the outside, the penetrating hole communicating with the port, and an annular pilot valve seat provided in an end of the valve container, and the pilot valve body having a large diameter portion, a small diameter portion slidably inserted into the valve container, and a concave portion provided between the large diameter portion and the small diameter portion to face the penetrating hole, and an end of the large diameter portion is seated on or unseated from the pilot valve seat to open or close the pilot passage.
摘要:
Disclosed are a method and device for modulating the downstream pressure output of a pressure reducing hydraulic control valve in response to the flow demand fluctuation the method comprising. Included is an adjustable pressure pilot valve mechanism having a drive element extending from the control valve. The drive element is displaceable in response to a flow capacity through the hydraulic control valve. Also included is an adjustable pressure pilot valve deployed along a control tube connecting an upstream pressure port to a downstream pressure port, the adjustable pressure pilot valve associated with the drive element such that adjustable settings of the adjustable pressure pilot valve are responsive to displacement of the drive element.
摘要:
A high-pressure seat valve comprises a valve housing (1) having a main flow passage (2) with a valve seat (3) therein, a valve body (4) being resiliently biased against said seat (3), and at least one passage for a control flowto a control unit, (7) said control flow being branched-off from the main flow. The control unit (7) is adapted to regulate the control flow and to control by means of a control member located in the main flow passage also the main flow as a function of the control flow by continuous variation of the position of the valve body (4) between closed and fully open position, the valve seat (3) furthermore being surrounded by a cylindrical wall (8) spaced radially outwardly of the seat (3) and extending axially away therefrom, within which wall (8) the valve body (4) formed as a piston is closely slidably mounted. The control member comprises at least one connecting passage (6) in the cylindrical wall (8) and/or in the peripheral surface of the valve body (4). For providing the seat valve to operate as an adjustable control valve in high-pressure uses, the valve is distinguished in that the connecting passage (6) extends between the input connection (2a) of the valve and the space (5) located at the valve body end remote from the valve seat (3) and forms a connecting passage (6), the throw-flow area of which increases with increasing distance of the valve body (4) from the valve seat (3), whereby a self-adjustment of the valvebody (4) is obtained corresponding to variations of the flowthrough the control unit (7).
摘要:
A system for manually overriding a solenoid operated valve 110 in an event of power failure is provided. The system includes a solenoid operated valve 110 and a lifter 300. The solenoid operated valve 110 includes a valve body 120 including a sealing surface 112, a fluid inlet 121 and a fluid outlet 122 , a sealing element 111 selectively separating the fluid inlet 121 from the fluid outlet 122 and a solenoid 113 configured to selectively couple and decouple the sealing element 111 to the sealing surface 112. The lifter 300 is threadedly coupled to the solenoid operated valve 110. Rotation of the lifter 300 relative to the valve body 120 in a first direction causes the lifter 300 to decouple the sealing element 111 from the sealing surface 112.