GB2329703A - Non-refillable valve - Google Patents

Non-refillable valve Download PDF

Info

Publication number
GB2329703A
GB2329703A GB9720202A GB9720202A GB2329703A GB 2329703 A GB2329703 A GB 2329703A GB 9720202 A GB9720202 A GB 9720202A GB 9720202 A GB9720202 A GB 9720202A GB 2329703 A GB2329703 A GB 2329703A
Authority
GB
United Kingdom
Prior art keywords
valve
refillable
pin
floating
retainer
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB9720202A
Other versions
GB9720202D0 (en
GB2329703B (en
Inventor
Paul Anthony Mercer
Stephen Graham Rowe
P Mercer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bedfont Scientific Ltd
Original Assignee
Bedfont Scientific Ltd
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 Bedfont Scientific Ltd filed Critical Bedfont Scientific Ltd
Priority to GB9720202A priority Critical patent/GB2329703B/en
Publication of GB9720202D0 publication Critical patent/GB9720202D0/en
Publication of GB2329703A publication Critical patent/GB2329703A/en
Application granted granted Critical
Publication of GB2329703B publication Critical patent/GB2329703B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • F16K1/304—Shut-off valves with additional means
    • F16K1/306—Shut-off valves with additional means with a valve member, e.g. stem or shaft, passing through the seat
    • 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
    • F17C13/04—Arrangement or mounting of 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
    • F17C2205/0323—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
    • 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
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • 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
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035—High pressure (>10 bar)
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/02—Improving properties related to fluid or fluid transfer
    • F17C2260/028—Avoiding unauthorised transfer

Abstract

A non-refillable valve comprises a valve body 1 with a main valve pin 2 operable therein to allow discharge through the valve and a floating valve pin 6 operable therein to allow discharge through the valve but to prevent filling through the valve and comprising a removable retainer 9, which may be a press-fitted plug in the valve body, operable in relation to the floating valve pin 6 to allow an initial filling through the valve. The removable retainer 9 is preferably arranged to fall within a container to which the valve is filled to give an audible indication of non-refillability. The valve is suited to use on gas cylinders, especially for check and calibration gases.

Description

Non-refillable valve This document relates to a non-refillable valve which can be used on a range of nonrefillable disposable) gas cylinders.
The gas cylinders are used world wide in the distribution and use of a wide variety of check and calibration gases, for the check and calibration of gas monitoring equipment.
The basic valve, which in this form is not a unique design, is used to release the gas from the cylinder. With the addition of this invention the valve gives the following user benefits :1) Maintains product integrity.
2) Meets the requirements of prEN12205.
3) Does not change performance characteristics.
4) Incorporates a free floating valve pin that permits full discharge and closes if connected to a higher pressure source.
5) Increased user safety. The non-refillable valve prevents accidental contamination if inadvertently connected to a pressure source higher than the pressurised cylinders contents.
6) Discourages unauthorised refilling attempts of partially or fully discharged cylinders.
A specification for the valve of the invention is: Operating pressure 500 psig (35.15 kg/cm2 guage) Compatibility All gas mixtures Thermal relief 100"C Materials Nickel plated brass Stainless steel Aluminium Seals P.T.F.E. (polytetrafluoroethylene) Nitrile Outlet size 5/8 inch (1.5875 CM) UNF An example of a valve according to the invention will now be described with reference to the accompanying drawings.
Figure 1 is an expanded part-sectional view showing the interrelationship between the parts of the valve.
Figure 2 is a part-sectional view of the valve showing the relative position of its parts during evacuation and filling.
Figure 3 is a part-sectional view of the valve showing the relative position of its parts at the moment of actuation of the non-refill mechanism.
Figure 4 is a part-sectional view of the valve showing the relative position of its parts after the non-refill mechanism has been actuated.
Figure 5 is a part-sectional view of the valve showing the relative position of its parts during attempted refill.
The parts of the valve with reference to any of the Figures are as follows: 1 The valve body.
2 Main valve pin 21 Main valve pin base 3 O-ring 4 Spring 5 o-ring 6 Floating valve pin 7 O-ring 8 Non-return seat 9 Floating pin retainer 10 Solder safety plug The operation of the valve is described as follows it being assumed that it is connected to a gas cylinder (not shown). With reference to Figure 4, during the evacuation and filling process the floating pin (6) is prevented from seating in the non-return seat (8) by the floating pin retainer (9) which is fitted in seat (8). This allows the cylinder to be evacuated and filled through the main valve pin (2). When the evacuation/filling process is complete a special tool (not shown) is used to depress the main valve pin (2) further than required for normal operation, as depicted in Figure 5. This causes the base of the main valve pin (21), which lies co-axially with the floating valve pin, to contact the floating valve pin (6) and to push it downwards so as to in turn contact the floating pin retainer and force it out of its seat to activate the non-return mechanism of the valve. The downwards movement of the floating pin (6) is limited by the engagement of during (7) on the shoulder of non-return seat (8).
The floating pin retainer falls loose to the bottom of a cylinder to which the valve is fitted and provides an audible check that the non-return valve mechanism has been activated. The main valve pin will return to its original position under pressure from spring (4). When the main valve pin (2) is again depressed as depicted in Figure 6 the pressure of the cylinder gas will lift the floating pin (6) out of its non-return seat (8) allowing the gas to discharge. At any time during use, or after the contents of the cylinder have been discharged, should the cylinder be accidently or deliberately connected to an external source of pressure higher than the internal pressure of the cylinder and the valve (2) manually opened the pressure differential will instantly force the floating pin (6) into the non-return seat (8) which prevents the introduction of materials into the cylinder. The valve is also fitted with a thermal secondary pressure relief (10). This is a low melting point solder which will melt at 1000C to release the cylinder contents before the cylinder reaches bursting pressure.

Claims (13)

Claims
1) Once the valve has been activated, the floating pin retainer gives an audible indication that the valve is now non-refillable.
2) No secondary assembly operations are required as the non-refillable section is in place during the filling stage.
3) The valve can be used for any gas cylinders with 1" UNF openings, with an operating pressure of up to 500 psig.
4) Materials used ensure that the valve is fully compatible with all gas mixtures.
5) Once the valve has been activated the valve cannot be disabled and hence, is tamper proof.
Amendments to the claims have been filed as follows 1. A non-refillable valve comprising a valve body with a main valve pin operable therein to allow discharge through the valve and a floating valve pin operable therein to allow discharge through the valve but to prevent filling through the valve.
2. A non-refillable valve as claimed in claim 1 comprising a removable retainer operating in relation to the floating valve pin to allow an initial filling through the valve.
3. A non-refillable valve as claimed in claim 2 wherein the said retainer is a press-fitted plug incorporated into the valve body.
4. A non-refillable valve as claimed in claim 2 or 3 wherein the retainer is arranged, on removal, to fall within a vessel to which the valve is fitted.
5. A non-refillable valve as claimed in any preceding claim wherein the main valve pin is spring-loaded.
6. A non-refillable valve as claimed in any preceding claim wherein the main valve pin and the floating valve pin are arranged coaxially.
7. A non-refillable valve as claimed in any preceding claim wherein the main valve pin may be brought into contact with the floating valve pin to cause removal of the retainer.
8. A non-refillable valve as claimed in any preceding claim wherein the valve body comprises a safety device.
9. A non-refillable valve as claimed in claim 8 wherein the safety device is a solder plug.
10. A non-refillable valve as claimed in claim 1 wherein the said valve contains a non-return device.
11. A filled gas container fitted with a valve as claimed in Claim 1 and containing a floating valve pin retainer which has been remover from the valve and is capable of giving an audible indication of its presence when the cylinder is moved.
12. A non-return mechanism for a valve substantially as described herein with reference to any one of Figures 1 to 7.
13. A non-refillable valve substantially as described herein with reference to any one of Figures 1 to 7.
GB9720202A 1997-09-24 1997-09-24 Non-refillable valve Expired - Fee Related GB2329703B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9720202A GB2329703B (en) 1997-09-24 1997-09-24 Non-refillable valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9720202A GB2329703B (en) 1997-09-24 1997-09-24 Non-refillable valve

Publications (3)

Publication Number Publication Date
GB9720202D0 GB9720202D0 (en) 1997-11-26
GB2329703A true GB2329703A (en) 1999-03-31
GB2329703B GB2329703B (en) 2001-09-05

Family

ID=10819506

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9720202A Expired - Fee Related GB2329703B (en) 1997-09-24 1997-09-24 Non-refillable valve

Country Status (1)

Country Link
GB (1) GB2329703B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004068027A1 (en) * 2003-01-28 2004-08-12 L'air Liquide - Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Non-refillable valve device
FR2898954A1 (en) * 2006-03-23 2007-09-28 Air Liquide Filter valve for use in pressure fluid cylinder, has piston mounted at interior of body in movable manner, and spring retaining ring maintaining piston relative to body in opening position of internal orifice
ITMI20090872A1 (en) * 2009-05-19 2010-11-20 Bridgeport S R L VALVE FOR FLUID IN PRESSURE CONTAINER NOT RECHARGEABLE
CN102016281A (en) * 2008-04-24 2011-04-13 乔治洛德方法研究和开发液化空气有限公司 Pressurized gas receiving device, dispenser-receiving device assembly, and corresponding supply system
EP3059488A1 (en) * 2015-02-23 2016-08-24 Gas Tec S.r.l. Valve with refill-preventing device for disposable containers of gas under pressure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401072A1 (en) * 1989-05-29 1990-12-05 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Valve assembly for a packing under fluid pressure and packing provided with such an assembly
EP0598640A1 (en) * 1992-11-17 1994-05-25 Liquid Air Corporation Refill-preventing valve for non-refillable containers
US5383487A (en) * 1994-03-29 1995-01-24 Home; William Refill-prevention valve
EP0768485A1 (en) * 1995-10-11 1997-04-16 Amtrol Inc. Valves for pressurized containers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401072A1 (en) * 1989-05-29 1990-12-05 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Valve assembly for a packing under fluid pressure and packing provided with such an assembly
EP0598640A1 (en) * 1992-11-17 1994-05-25 Liquid Air Corporation Refill-preventing valve for non-refillable containers
US5383487A (en) * 1994-03-29 1995-01-24 Home; William Refill-prevention valve
EP0768485A1 (en) * 1995-10-11 1997-04-16 Amtrol Inc. Valves for pressurized containers

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004068027A1 (en) * 2003-01-28 2004-08-12 L'air Liquide - Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Non-refillable valve device
US6932238B2 (en) 2003-01-28 2005-08-23 Air Liquide Advanced Technologies U.S. Llc Non-refillable valve device
FR2898954A1 (en) * 2006-03-23 2007-09-28 Air Liquide Filter valve for use in pressure fluid cylinder, has piston mounted at interior of body in movable manner, and spring retaining ring maintaining piston relative to body in opening position of internal orifice
CN102016281A (en) * 2008-04-24 2011-04-13 乔治洛德方法研究和开发液化空气有限公司 Pressurized gas receiving device, dispenser-receiving device assembly, and corresponding supply system
ITMI20090872A1 (en) * 2009-05-19 2010-11-20 Bridgeport S R L VALVE FOR FLUID IN PRESSURE CONTAINER NOT RECHARGEABLE
EP2253871A1 (en) 2009-05-19 2010-11-24 Bridgeport S.R.L. Valve for non-refillable container of pressurized fluid
EP3059488A1 (en) * 2015-02-23 2016-08-24 Gas Tec S.r.l. Valve with refill-preventing device for disposable containers of gas under pressure

Also Published As

Publication number Publication date
GB9720202D0 (en) 1997-11-26
GB2329703B (en) 2001-09-05

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20150924