Abstract:
A pressure and vacuum valve device for a venting line to a fuel tank, wherein the venting line comprises a first section (31, 32) which contains a pressure valve (3, 15), which opens when the pressure in the tank exceeds a preset value depending on the mass of a valve plate (3) being comprised in the pres¬ sure valve, which in a sealing way rests on a seat (15) in the first line section and wherein the venting line has a second line section (42, 47), which contains a vacuum valve (50, 52), which opens when the pressure in the tank falls down to a preset value underneath the atmospheric pressure, wherein the vacuum valve comprises an annular plate (50), which under the influence of gravity in a sealing way rests on at least one valve seat (48) through which the second line section extends. The valve plate (3) of the pressure valve is provided with the valve seat (48) of the vacuum valve and supports the valve plate (50, 52) of the vacuum valve, a vertical through opening (47) in the pressure valve plate (3) being arranged to be opened and closed, respectively, by the vacuum valve plate (50, 52).
Abstract:
A fluid pressure relief system and method for a pressure vessel or tank (10) having a normal vent (16) with a first pilot operated safety valve (18) and an emergency vent (62) having a second pilot operated safety valve (25). A vapor recovery line (20) is connected to relief valve (18) and collected at a vapor storage container (21). A manway (22) on the pressure vessel (10) (shown in Figure 2) defines the emergency vent (62) and a main valve member (66) has a counterweight (74) thereon to urge main valve member (66) to a seated closed position on nozzle (60). The first pilot operated safety valve (18) for the normal vent (16) (is shown in Figure 7) and has a T-shaped body (142) with a main relief valve member (172) at one end of the body (142) mounted for movement in a generally horizontal direction and controlled by a diaphragm (176) at an opposite end of the body (142).
Abstract:
A valve for regulating negative pressure and excess pressure in a container is described. The valve comprises a pressure relief component having a movable weight (3) connected to a magnet (2) and an outlet nozzle (4). In order to obtain an outflow rate from the valve that is greater than or equal to 30 m/sec, the cross-sectional area which the weight (3) uncovers is greater than or equal to 1.5 times the cross-sectional area of the outlet nozzle. The valve also comprises a vacuum relief component consisting of a movable weight (7) and a flame arrestor (6). Both the vacuum relief component and the pressure relief component are furnished with test levers (5, 8) for the manual manipulation of the functions of the valve. A cover (9), which interacts with the movements of the weight (3), is also arranged on the pressure relief component of the valve.
Abstract:
A mounting assembly is provided for coupling a monitoring device to a valve assembly for relieving vacuum and over pressure conditions in a storage container. The valve assembly includes a body (104) including a first port (114) adapted to be in fluid communication with the storage container and a first valve seat (132) disposed in the body (104), and a first control assembly (124) including a first valve stem (140) and a first closure element (136) coupled to the first valve stem (140), the first closure member being movable relative to the first valve seat (132) in response to changes in pressure in the container. The mounting assembly includes a mounting bracket adapted to be coupled to a portion of the body and a mounting tube configured to be slidably coupled to the mounting bracket. The mounting tube is adapted to receive the monitoring device, which is configured to obtain data indicative of the operation of the valve assembly.
Abstract:
Clapet de contrôle (c) de la pression gazeuse interne d'un réservoir de liquide coopérant avec un orifice (10) pratiqué dans la partie supérieure de celui-ci, autorisant un écoulement gazeux vers l'extérieur du réservoir lorsque la différence entre la pression interne et la pression externe atteint un seuil prédéterminé, et un écoulement inversé lorsque la pression interne au réservoir est inférieure à la pression externe, caractérisé en ce qu'il comporte un corps (1) dont la partie inférieure est configurée pour obturer l'orifice (10) du réservoir, d'une masse telle qu'au-delà de ladite valeur différentielle de pression constituant le seuil prédéterminé, le corps (1) s'écarte de l'orifice (10), ledit corps (1) comportant de plus un évidement (4) traversant disposé dans la continuité de l'orifice (10) du réservoir lorsqu'ils sont en contact, ledit évidement (4) étant muni de moyens d'obturations (3) activables lorsque la pression différentielle entre le réservoir et l'atmosph¨re est positive.
Abstract:
A vapour containment valve cartridge (7) is disclosed and comprises a cartridge housing (12) for mounting within a valve housing and having an inlet, an outlet and a valve surface arranged between the inlet and the outlet and forming a portion of a generally spherical surface (18). A valve body (28) is received within the cartridge housing (12) and has an enlargement (31) forming part of a generally spherical surface of generally equal curvature to the generaly spherical surface (18) on the cartridge housing (12). A resilient O-ring seal (34) is accommodated in a groove (36) on enlargement (31) such that the weight of the valve body (28) causes sealing between the two generally spherical surfaces. As a result, vapour in the valve housing (12) below a threshold pressure is prevented from passing from the inlet to the outlet, and vapour above the threshold passes from the inlet to the outlet.
Abstract:
The invention relates to a device (1) for degassing a liquid. The invention is characterized in that the degassing device (1) that is vertically arranged in a mounted state comprises a piston (3) which can be vertically displaced in a piston chamber (2) by means of the liquid (4) that is to be degassed. A piston rod (6) of said piston (3) projects through a top degassing opening (7) of the piston chamber (2). A mass element (8) is connected to the piston (3) by means of the piston rod (6), is disposed in a vertically movable manner on the side of the degassing opening (7) that faces away from the piston chamber (2), and preloads the piston (3) into the lowest stroke position thereof. The mass element (8) closes the degassing opening (7) by means of a first seal (9) in the lowest stroke position while the piston (3) closes the degassing opening (7) by means of a second seal (10) in the highest stroke position. Air can escape from the piston chamber (2) into the environment in an intermediate position.
Abstract:
Die vorliegende Erfindung betrifft eine Entlüftungseinrichtung (1) zum Entlüften einer Flüssigkeit. Erfindungswesentich ist dabei, dass die in einem Einbauzustand stehend an- geordnete Entlüftungseinrichtung (1) einen, in einem Kolbenaum (2) mittels der zu entlüftenden Flüssigkeit (4) hubverstellbar angeordneten Kolben (3) aufweist, welcher mit einer Kolbenstange (6) durch eine deckenseitige Entlüftungsöffnung (7) des Kolbenraums (2) ragt. Auf der dem Kolbenraum (2) abgewandten Seite der Entlüftungsöffnung (7) ist ein, über die Kolbenstange (6) mit dem Kolben (3) verbundenes Masseelement (8) hubverstellbar angeordnet, welches den Kolben (3) in seine untere Hubendstellung vorspannt. In der unteren Hubendstellung verschließt das Masseelement (8) über eine erste Dichtung (9) die Entlüftungsöffnung (7) in der oberen Hubendstellung der Kolben (3) eine zweite Dichtung (10) die Entlüftungsöffnung (7) verschließt. In einer Zwischenstellung kann dabei Luft aus dem Kolbenraum (2) in die Umgebung gelangen.
Abstract:
Disclosed is an apparatus for preventing a valve and a valve seat of a safety valve from being frozen or ruptured to allow the safety valve to smoothly operate when an oil-tanker or a vessel for transporting chemical substance is on a voyage in a cold area. The apparatus includes a casing 10 enclosing a valve body 103 of a gas discharging valve 100 and fixed to a protruded portion 103a of the valve body at an upper portion thereof; a first steam pipe 30 connected to a steam supplying pipe of the vessel, primarily passed through the casing 10, spirally wound around an outside of the valve body 103, secondarily passed through the casing 10, and coupled to a joint 40 of the casing 10; and a second steam pipe 50 connected to the joint 40, primarily passed through an auxiliary casing 111 of a vacuum releasing valve 110 to allow steam passed through the first steam pipe 10 to flow into the second steam pipe 10 to flow into the second steam pipe, wound around a rod 112, secondarily passed through the auxiliary casing 111, and coupled to a steam recovering pipe of the vessel.
Abstract:
Embodiments of the present disclosure are directed toward a pressure vacuum relief valve and a seal assembly of the pressure vacuum relief valve. The seal assembly includes a ribbed substrate disposed against a flanged seat of the pressure vacuum relief valve. The ribbed substrate includes ribs extending from a base of the ribbed substrate. The seal assembly also includes a pallet coupled to and disposed below the ribbed substrate. The pallet includes a top ring, a bottom ring, and a flexible diaphragm captured between the top ring and the bottom ring. The flexible diaphragm of the pallet is configured to seal against the ribbed substrate in a sealed position. The pallet and ribbed substrate are configured to move together away from the flanged seat when a pressure on a sealed side of the pressure vacuum relief valve exceeds a maximum pressure threshold. The pallet is also configured to pivot open at an angle relative to the sealed position of the pallet when the pressure on the sealed side of the pressure vacuum relief valve falls below a minimum pressure threshold.