摘要:
Cet ensemble s'applique dans tous les domaines qui nécessitent l'écoulement d'un fluide avec contrôle d'ouverture/fermeture (réceptacles, canalisation...) Ce dispositif (Fig 1) se compose d'un clapet mobile (3) en matériau d'étanchéité actionné par une tige de commande. L'ensemble se caractérise par la forme hémisphérique du porte clapet (4) et du siège du clapet (Fig 1 B). L'ensemble présente au contact une grande surface, en pression ainsi qu'une limitation du couple de serrage par contact métal-métal.
摘要:
Ein Drucksteuerventil, insbesondere für Ölspritzdüsen für Brennkraftmaschinen, hat ein Gehäuse (11) mit einem Einlaßkanal (13) und einem Auslaßkanal (15), die über eine Ventilöffnung (18) verbunden sind. In einer Gehäusebohrung (12) ist ein Ventilverschlußglied (19) gleitverschieblich gegen die Wirkung einer axialen Feder (22) gehalten und in Schließstellung von der Feder (22) mit einer Ventilfläche (21) gegen eine gehäuseseitige Sitzfläche (17) angepreßt. Bei vorgegebenem, das Ventilverschlußglied (19) beaufschlagenden Druck, insbesondere des Öls im Einlaßkanal (13), ist das Ventilverschlußglied (19) von der Sitzfläche (17) abhebbar, wodurch der Mediumdurchgang vom Einlaßkanal (13) zum Auslaßkanal (15) freigegeben wird. Zumindest eine der beiden in der Schließstellung des Ventilverschlußgliedes (19) miteinander in Anlageberührung stehenden Flächen (21,17) des Ventilverschlußgliedes (19) bzw. Gehäuses (11) ist so ausgebildet, daß die Kontaktfläche verringert ist und dadurch die einer Ventilöffnung bei sehr geringem und eng toleriertem Öffnungsdruck entgegenwirkenden Adhäsionskräfte reduziert sind.
摘要:
The invention relates to a screw type valve comprising a valve shutter (11) with a base seal (15) and is axially movable in a control box from an open to a closed position through a rotating control stem. This stem (12), has an axial cavity (12a) which acts as a container for holding lubrificating grease; said shutter (11) has an axial through hole which has a first threaded part for connecting the control stem (12) and a second threaded part for receiving a screw (14) for fixing the base seal (15).
摘要:
Valve unit for metering a liquid, comprising a chamber into which a liquid supply pipe opens and which has a passage formed in the bottom thereof, and a shut-off element which is fitted at a bottom end of a lifting rod of a lifting mechanism and is vertically displaceable by the lifting mechanism between a closed position in the passage in which it shuts off the passage and an open position in which it opens the passage for allowing the liquid to pass out of the chamber, while a space bounded by a wall of the passage and the shut-off element gradually increases during the lifting of the shut-off element from the closed position to the open position, wherein the shut-off element is essentially cylindrical, and the shut-off element is essentially a truncated inverted cone shape, while in the closed position a bottom end of the shut-off element projects in a sealing manner past a bottom boundary edge of the passage.
摘要:
An aluminium valve which has a seat (43) of stainless steel. This seat is provided by friction welding stainless steel onto aluminium (44) and then shaping the composite to size. The stainless steel can be covered with stellite. The valve is closed by abutment of a PTFE bush (37) onto the seats. The seat can comprise a slope so that any contaminatory material tends to be forced off the seat by the bush in use.
摘要:
A liquid dispensing module includes a dispenser body assembly, a flexible seal, a needle, and an actuator. The dispenser body assembly includes a liquid inlet, a discharge outlet, and a flow channel including a valve seat between the inlet and outlet. The flexible seal engages the dispenser body assembly and includes a downstream end. The needle includes an enlarged portion engaging and retaining the downstream end of the flexible seal to place the flexible seal in lengthwise compression between the enlarged portion and the dispenser body assembly. The needle also includes a valve element that moves between open and closed positions. The flexible seal prevents liquid from leaking out of the flow channel.
摘要:
[Object] A valve core capable of suppressing manufacturing costs as compared to before is provided. [Solution] A valve core according to the present invention is provided with a first core cylinder body, a second core cylinder body having an opening as a valve opening on an opposite side to the first core cylinder body, a movable member having a valve body which opens and closes the valve opening and is provided at the front end of a shaft section linearly movably extending through the insides of the first core cylinder body and the second core cylinder body, an elastic member in contact with the movable member and the first core cylinder body and biasing so as to sandwich the second core cylinder body between the first core cylinder body and the valve body, and a pair of fitting sections including a first fitting section and a second fitting section, which are provided on the first core cylinder body and the second core cylinder body and which are rotatably fitted to each other and are separable from each other without interfering with each other.
摘要:
The subject matter of this specification can be embodied in, among other things, an apparatus that includes a valve with a valve housing having an axial bore, a first inlet port, a first outlet port, and a piston located within the axial bore and having a first fluid passage and configured to allow reciprocal axial movement of the piston within the axial bore between a first position in which the first fluid passage aligns axially with the first inlet port and the first outlet port to form a first fluidic circuit, and a second position in which the piston blocks at least one of the first inlet port and the first outlet port. The apparatus also includes a lockout assembly configurable to fix the piston into a selected position in a first configuration, and not interfere with reciprocal axial movement of the piston in a second configuration.