WO2009122449A1 - A valve unit with a level indicator for containers, in particular containers for liquefied gases - Google Patents

A valve unit with a level indicator for containers, in particular containers for liquefied gases Download PDF

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Publication number
WO2009122449A1
WO2009122449A1 PCT/IT2008/000211 IT2008000211W WO2009122449A1 WO 2009122449 A1 WO2009122449 A1 WO 2009122449A1 IT 2008000211 W IT2008000211 W IT 2008000211W WO 2009122449 A1 WO2009122449 A1 WO 2009122449A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
valve body
piston
valve unit
level indicator
Prior art date
Application number
PCT/IT2008/000211
Other languages
French (fr)
Other versions
WO2009122449A8 (en
Inventor
Ezio Cavagna
Original Assignee
Cavagna Group S.P.A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cavagna Group S.P.A filed Critical Cavagna Group S.P.A
Priority to PCT/IT2008/000211 priority Critical patent/WO2009122449A1/en
Publication of WO2009122449A1 publication Critical patent/WO2009122449A1/en
Publication of WO2009122449A8 publication Critical patent/WO2009122449A8/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/30—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces specially adapted for pressure containers
    • F16K1/307—Additional means used in combination with the main valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/56—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
    • G01F23/62—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using magnetically actuated indicating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0305—Bosses, e.g. boss collars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382—Constructional details of valves, regulators
    • F17C2205/0385—Constructional details of valves, regulators in blocks or units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0391—Arrangement of valves, regulators, filters inside the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • F17C2250/0413—Level of content in the vessel with floats

Definitions

  • the present invention relates to a valve unit with a level indicator for containers, in particular containers for compressed liquefied gases.
  • the valve unit is of the type with a floating indicator which, by means of a rod, controls the displacement of a primary magnet adapted to actuate the moving assembly of the indicator by magnetic coupling.
  • the technical solution makes it necessary to enlarge the valve body so that separate passages can be provided for the floating indicator rod and for the gas. This enlargement may interfere adversely with the take-up arms of automatic filling plant for cylinders, causing losses of gas, filling problems and other undesirable drawbacks.
  • the main object of the invention is to provide a valve unit with a level indicator for containers, in particular containers for compressed liquefied gases, which is structurally and functionally designed to remedy the drawbacks described above with reference to the cited prior art.
  • a further object of the invention is to provide a valve unit of simple and functional structure, in which the level of the fuel may be read in a practical way and, where necessary or useful, using two different methods of indication.
  • Fig. 1 is a view in axial section of a valve unit of the present invention
  • Fig. 2 is a partial view in lateral elevation of the unit of Fig. 1;
  • Fig. 3 is an overall diagrammatic view of the unit of the preceding Figures, seen from the opposite side with respect to Fig. 2;
  • Fig. 4 is a view in frontal elevation of the unit of the preceding Figures;
  • Fig. 5 is a perspective view, with parts removed, of the unit of the preceding Figures.
  • valve unit of the invention is shown overall by 1.
  • the unit 1 is of the tap type and is adapted to be applied to a container (cylinder B shown only partially) for compressed liquefied gases.
  • the unit 1 comprises a valve body 2 of amagnetic material bearing a threaded spigot 3 by means of which it is screwed in a leak-tight manner into a threaded hole 4 of the cylinder B.
  • valve body 2 as regards those parts which are to be coupled with existing automatic filling stations, is of standard type, i.e. it has outer dimensions and an outer geometry similar to those of similar known valve bodies, albeit without level indicators.
  • the valve body 2 and the spigot 3 are provided with a substantially axial passage 2a acting both as a gas duct, for the filling of and supply from the gas cylinder, and as a passage for a control rod 5 of a floating actuator 6 belonging to the unit 1 and normally contained in the cylinder B.
  • the rod 5 may slide in a tubular guide 7 held in the spigot 3 by a retaining member ⁇ .
  • the float 9 of the actuator 6 is hinged on a support 9a which is in turn secured to an end of the guide 7 opposite the member 8.
  • a piston shutter 10 with a wheel control 11 may be displaced axially in the valve body 2 to and from a valve seat 12 in order selectively to intercept the gas duct 2a between the passage extending through the spigot 3 and a supply/filling mouth 13 to which the gas consumer unit is normally connected.
  • the wheel 11 is integrated with the piston shutter 10.
  • a safety valve 14 of conventional construction is disposed in a tubular projection extending from the valve body 2 on the side diametrically opposite the mouth 13.
  • the valve 14 is disposed upstream of the valve seat 12 in order to protect the cylinder from any overpressure.
  • the piston shutter 10 is displaced axially during the operational control to open and intercept the valve seat 12 by means of a screw and bolt connection 15 of its collar 15a within a sleeve portion of the valve body 2 and is provided with a blind axial cavity 16, in which a primary permanent magnet 17 in contact with the free end of the rod 5 is guided in a sliding manner so that the position of the magnet along the cavity 16 is representative of the level of fluid remaining in the cylinder B.
  • the axial cavity of the piston is closed in a leak-tight manner with respect to the gas duct by mean of a gasket 18 through which the rod 5 passes.
  • the unit 1 further comprises a level indicator 20 including a housing 21 in which a moving assembly 22 with a secondary magnet 23 subject to the magnetic field of the primary magnet 17 is hinged along an axis substantially transverse to the axis of the valve body 2.
  • the level indicator 20 is preferably secured in a detachable manner to the valve body 2 by means of two arms 24 which partially encompass the body 2 in the vicinity of the mouth 13. In this way, the indicator 20 may be removed from the cylinder when it is being prepared for filling, thereby limiting any possibility of damage to the indicator. The user may also keep the indicator and fit it onto a new full cylinder which is installed to replace an empty cylinder.
  • the indicator 20 may be secured to the valve body, for instance by means of a screw 25 disposed on one of the arms 24.
  • the moving assembly 22 is secured to the valve body independently from the piston shutter so that the movement of the latter does not influence the information supplied by the moving assembly.
  • This moving assembly in turn comprises a drum indicator 26 bearing the secondary . magnet 23 in an eccentric position and partially visible through a port 27 of the housing 21.
  • a different colouring of the jacket of the drum 26 it is possible to give an overall indication of the level of fluid in the cylinder B.
  • the wheel indicator also bears, at an axial end, a needle 28 which indicates the level of fluid in the cylinder B in an accurate matter on a dial 29.
  • the present invention makes it possible to obtain a valve having, as regards those parts involved in operations to fill the cylinder, the same geometry as versions without a level indicator.
  • This makes it possible to carry out the operations to fill the cylinders with existing standard equipment.
  • the main object proposed is achieved in this way and entails a number of advantages including: - an adequate section is maintained for the passage of gas through the valve unit so as to avoid any lengthening of filling times; the legibility of the indication of the remaining fluid level in the container is improved for any user; the reliability and efficiency of the valve is ensured by separating the internal parts in contact with the gas from the external parts adapted solely to display the level; the legibility of the level indicator remains the same whether the tap is closed or open.

Abstract

A valve unit with a level indicator for containers, in particular containers for liquefied gases, comprising; a valve body having external dimensions and an external geometry compatible with filling equipment used for similar valve bodies, without a level indicator, and having a substantially axial gas duct, a piston shutter which may be axially displaced in the valve body to and from a valve seat in order selectively to intercept the gas duct, a control rod of a floating actuator extending into the gas duct and into an axial cavity of the piston, a primary magnet which may be displaced axially in the axial cavity of the piston under the action of the control rod in response to a variation of the level in the container, a level indicator including a moving assembly subject to the magnetic field of the primary magnet in order to display the gas level detected by the floating actuator, the level indicator comprises a housing for the moving assembly which is secured to the valve body independently from the piston shutter.

Description

A VALVE UNIT WITH A LEVEL INDICATOR FOR CONTAINERS, IN PARTICULAR CONTAINERS FOR LIQUEFIED GASES Technical field
The present invention relates to a valve unit with a level indicator for containers, in particular containers for compressed liquefied gases. Technological background
These containers, also known as cylinders, are widely used when no connection to the mains supply of fuel gas is available.
It is useful for users to know the level of the liquid remaining in the container so that they are not caught unawares when the fuel runs out. To that end, it is known to equip these containers with valve units provided with level indicators and/or devices warning that the cylinder is empty which make it possible to monitor the gas consumption so that the cylinder can be promptly replaced when it runs out. A typical example of this technology is disclosed in document IT-
1198140. The valve unit is of the type with a floating indicator which, by means of a rod, controls the displacement of a primary magnet adapted to actuate the moving assembly of the indicator by magnetic coupling. The technical solution makes it necessary to enlarge the valve body so that separate passages can be provided for the floating indicator rod and for the gas. This enlargement may interfere adversely with the take-up arms of automatic filling plant for cylinders, causing losses of gas, filling problems and other undesirable drawbacks.
A further example of this technology is disclosed in Italian Patent Application PD2006A000079 in the name of the Applicants. In this solution, the rod is provided coaxially in the gas passage thereby limiting the bulk of the valve body. In this case, however, the solution described comprises a relatively complex indicator which may potentially provide information correlated with the positioning of the wheel opening the shutter of the valve unit.
Description of the invention
The main object of the invention is to provide a valve unit with a level indicator for containers, in particular containers for compressed liquefied gases, which is structurally and functionally designed to remedy the drawbacks described above with reference to the cited prior art.
A further object of the invention is to provide a valve unit of simple and functional structure, in which the level of the fuel may be read in a practical way and, where necessary or useful, using two different methods of indication. Brief description of the drawings
The features and advantages of the invention will become clear from the following detailed description of a preferred embodiment thereof, given purely by way of non-limiting example, with reference to the appended drawings, in which: Fig. 1 is a view in axial section of a valve unit of the present invention;
Fig. 2 is a partial view in lateral elevation of the unit of Fig. 1;
Fig. 3 is an overall diagrammatic view of the unit of the preceding Figures, seen from the opposite side with respect to Fig. 2; Fig. 4 is a view in frontal elevation of the unit of the preceding Figures;
Fig. 5 is a perspective view, with parts removed, of the unit of the preceding Figures.
Preferred embodiment of the invention In the drawings, a valve unit of the invention is shown overall by 1.
The unit 1 is of the tap type and is adapted to be applied to a container (cylinder B shown only partially) for compressed liquefied gases. The unit 1 comprises a valve body 2 of amagnetic material bearing a threaded spigot 3 by means of which it is screwed in a leak-tight manner into a threaded hole 4 of the cylinder B.
The valve body 2, as regards those parts which are to be coupled with existing automatic filling stations, is of standard type, i.e. it has outer dimensions and an outer geometry similar to those of similar known valve bodies, albeit without level indicators. The valve body 2 and the spigot 3 are provided with a substantially axial passage 2a acting both as a gas duct, for the filling of and supply from the gas cylinder, and as a passage for a control rod 5 of a floating actuator 6 belonging to the unit 1 and normally contained in the cylinder B.
The rod 5 may slide in a tubular guide 7 held in the spigot 3 by a retaining member δ.The float 9 of the actuator 6 is hinged on a support 9a which is in turn secured to an end of the guide 7 opposite the member 8.
A piston shutter 10 with a wheel control 11 may be displaced axially in the valve body 2 to and from a valve seat 12 in order selectively to intercept the gas duct 2a between the passage extending through the spigot 3 and a supply/filling mouth 13 to which the gas consumer unit is normally connected. The wheel 11 is integrated with the piston shutter 10.
A safety valve 14 of conventional construction is disposed in a tubular projection extending from the valve body 2 on the side diametrically opposite the mouth 13. The valve 14 is disposed upstream of the valve seat 12 in order to protect the cylinder from any overpressure.
The piston shutter 10 is displaced axially during the operational control to open and intercept the valve seat 12 by means of a screw and bolt connection 15 of its collar 15a within a sleeve portion of the valve body 2 and is provided with a blind axial cavity 16, in which a primary permanent magnet 17 in contact with the free end of the rod 5 is guided in a sliding manner so that the position of the magnet along the cavity 16 is representative of the level of fluid remaining in the cylinder B.
The axial cavity of the piston is closed in a leak-tight manner with respect to the gas duct by mean of a gasket 18 through which the rod 5 passes.
The unit 1 further comprises a level indicator 20 including a housing 21 in which a moving assembly 22 with a secondary magnet 23 subject to the magnetic field of the primary magnet 17 is hinged along an axis substantially transverse to the axis of the valve body 2. The level indicator 20 is preferably secured in a detachable manner to the valve body 2 by means of two arms 24 which partially encompass the body 2 in the vicinity of the mouth 13. In this way, the indicator 20 may be removed from the cylinder when it is being prepared for filling, thereby limiting any possibility of damage to the indicator. The user may also keep the indicator and fit it onto a new full cylinder which is installed to replace an empty cylinder. As an alternative, the indicator 20 may be secured to the valve body, for instance by means of a screw 25 disposed on one of the arms 24.
It will be appreciated that in all cases the moving assembly 22 is secured to the valve body independently from the piston shutter so that the movement of the latter does not influence the information supplied by the moving assembly.
This moving assembly in turn comprises a drum indicator 26 bearing the secondary . magnet 23 in an eccentric position and partially visible through a port 27 of the housing 21. By means of a different colouring of the jacket of the drum 26 it is possible to give an overall indication of the level of fluid in the cylinder B. The wheel indicator also bears, at an axial end, a needle 28 which indicates the level of fluid in the cylinder B in an accurate matter on a dial 29.
These features mean that the present invention makes it possible to obtain a valve having, as regards those parts involved in operations to fill the cylinder, the same geometry as versions without a level indicator. This makes it possible to carry out the operations to fill the cylinders with existing standard equipment. The main object proposed is achieved in this way and entails a number of advantages including: - an adequate section is maintained for the passage of gas through the valve unit so as to avoid any lengthening of filling times; the legibility of the indication of the remaining fluid level in the container is improved for any user; the reliability and efficiency of the valve is ensured by separating the internal parts in contact with the gas from the external parts adapted solely to display the level; the legibility of the level indicator remains the same whether the tap is closed or open.

Claims

1. A valve unit (1) with a level indicator (20) for containers, in particular containers for liquefied gases, comprising;
- a valve body (2) with a Substantially axial gas duct (2a), - a piston shutter (10) which may be axially displaced in the valve body (2) to and from a valve seat (12) in order selectively to intercept the gas duct (2a),
- a control rod (5) of a floating actuator (6) extending into the gas duct (2a) and into an axial cavity (16) of the piston (10), - a primary magnet (17) which may be displaced axially in the axial cavity (16) of the piston (10) under the action of the control rod (5) in response to a variation of the level in the container (B),
- a level indicator (20) including a moving assembly (22) subject to the magnetic field of the primary magnet (17) in order to display the gas level detected by the floating actuator (6),
- wherein the level indicator (20) comprises a housing (21) for the moving assembly (22) which is secured to the valve body (2) independently from the piston shutter (10).
2. A valve unit (1) according to claim 1, wherein the housing (21) is secured to the valve body (2) in a detachable manner.
3. A valve unit (1) according to claim 1 or 2, wherein the valve body
(2) comprises a safety valve (14) and the housing (21) is secured to the valve body (2) on the side diametrically opposite the safety valve (14).
4. A valve unit (1) according to claim 3, wherein the valve body (2) comprises a filling and supply mouth (13) on the side opposite the safety valve (14) and the housing (21) is secured to the valve body (2) in a position immediately above the filling and supply mouth (13).
5. A valve unit (1) according to one or more of the preceding claims, wherein the piston shutter (10) is of the type with a wheel control (11), the wheel being integrated with the piston shutter (10).
6. A valve unit (1) according to one or more of the preceding claims, wherein the axial cavity (16) of the piston (10) is closed in a leak- tight manner with respect to the gas duct (2a).
7. A valve unit (1) according to claim 6, wherein the axial cavity (16) of the piston (10) is closed by means of a gasket (18) through which the rod (5) passes.
8. A valve unit (1) according to one or more of the preceding claims, wherein the level indicator (20) comprises a needle display (28) and a drum display (26) both connected to the moving assembly (22).
9. A valve unit (1) according to claim 8, wherein the drum indicator (26) is in two colours.
10. A valve unit (1) according to claim 1, wherein the valve body (2) has external geometrical dimensions compatible with filling equipment used for similar valve bodies without a level indicator.
PCT/IT2008/000211 2008-03-31 2008-03-31 A valve unit with a level indicator for containers, in particular containers for liquefied gases WO2009122449A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2008/000211 WO2009122449A1 (en) 2008-03-31 2008-03-31 A valve unit with a level indicator for containers, in particular containers for liquefied gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2008/000211 WO2009122449A1 (en) 2008-03-31 2008-03-31 A valve unit with a level indicator for containers, in particular containers for liquefied gases

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WO2009122449A1 true WO2009122449A1 (en) 2009-10-08
WO2009122449A8 WO2009122449A8 (en) 2010-01-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20122103A1 (en) * 2012-12-10 2014-06-11 Rivoira S P A COMPRESSED AND LIQUEFIED GAS CYLINDER EQUIPPED WITH A DETECTION, INDICATION AND TRANSMISSION SYSTEM FOR THE LIQUID RESERVE LEVEL

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697350A (en) * 1953-02-25 1954-12-21 Sorber Gordon Paul Liquid level gauge
US4507961A (en) * 1981-12-07 1985-04-02 Fabio Stradella Level gauge for liquefied gas tanks, with dial-and-hand indicator actuated by an axially movable drive coupled with a single internal magnet
FR2587438A1 (en) * 1985-03-20 1987-03-20 Clesse Pingeot Sa Tap for liquefied-gas bottle, with device for viewing the filling level of the bottle
IT1197140B (en) * 1986-09-01 1988-11-25 Omeca Spa Cock with level indicator for liquefied gas containers
EP1617188A1 (en) * 2004-07-13 2006-01-18 Cavagna Group S.p.A. Valve with integrated level indicator
EP1688650A1 (en) * 2005-02-02 2006-08-09 Torrent Trading Ltd. Tap assembly with overfill protection and level gauge
EP1843078A1 (en) * 2006-04-07 2007-10-10 Compagnie des Gaz de Pétrole Primagaz Gas bottle with alarm device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697350A (en) * 1953-02-25 1954-12-21 Sorber Gordon Paul Liquid level gauge
US4507961A (en) * 1981-12-07 1985-04-02 Fabio Stradella Level gauge for liquefied gas tanks, with dial-and-hand indicator actuated by an axially movable drive coupled with a single internal magnet
FR2587438A1 (en) * 1985-03-20 1987-03-20 Clesse Pingeot Sa Tap for liquefied-gas bottle, with device for viewing the filling level of the bottle
IT1197140B (en) * 1986-09-01 1988-11-25 Omeca Spa Cock with level indicator for liquefied gas containers
EP1617188A1 (en) * 2004-07-13 2006-01-18 Cavagna Group S.p.A. Valve with integrated level indicator
EP1688650A1 (en) * 2005-02-02 2006-08-09 Torrent Trading Ltd. Tap assembly with overfill protection and level gauge
EP1843078A1 (en) * 2006-04-07 2007-10-10 Compagnie des Gaz de Pétrole Primagaz Gas bottle with alarm device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20122103A1 (en) * 2012-12-10 2014-06-11 Rivoira S P A COMPRESSED AND LIQUEFIED GAS CYLINDER EQUIPPED WITH A DETECTION, INDICATION AND TRANSMISSION SYSTEM FOR THE LIQUID RESERVE LEVEL

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