WO2000067089A1 - A tension controlled pressure reducing valve - Google Patents

A tension controlled pressure reducing valve Download PDF

Info

Publication number
WO2000067089A1
WO2000067089A1 PCT/CZ2000/000029 CZ0000029W WO0067089A1 WO 2000067089 A1 WO2000067089 A1 WO 2000067089A1 CZ 0000029 W CZ0000029 W CZ 0000029W WO 0067089 A1 WO0067089 A1 WO 0067089A1
Authority
WO
WIPO (PCT)
Prior art keywords
reducing valve
tube
tension controlled
mpa
pressure
Prior art date
Application number
PCT/CZ2000/000029
Other languages
French (fr)
Inventor
Miroslav Kder
Original Assignee
Miroslav Kder
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 Miroslav Kder filed Critical Miroslav Kder
Priority to AU40982/00A priority Critical patent/AU4098200A/en
Publication of WO2000067089A1 publication Critical patent/WO2000067089A1/en

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
    • G05D16/0611—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being deformable, e.g. Bourdon tube
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/02—Valves
    • A62B9/022—Breathing demand regulators
    • A62B9/027—Breathing demand regulators pilot operated, i.e. controlled by valve means sensitive to a reduced downstream pressure

Definitions

  • the present invention relates to a tension controlled pressure reducing valve for gas pressure control, particularly useful m the closed circuit breathing apparatuses, with a fixed setting of the secondary pressure.
  • the prior art pressure reducing valves for gas pressure control usually employ a diaphragm or a piston as the controlling member.
  • a diaphragm valve is adjustable by means of adjustable springs.
  • the valves are also provided with the necessary threaded joints and gaskets. The parts of such valve require to be worked precisely. Large-diameter threaded joints are necessary. Consequently, such valves are rather massy.
  • the present invention relates to a tension controlled pressure reducing valve for gas pressure control, particularly useful in the closed circuit breathing apparatuses, provided with a fixed setting of the secondary pressure.
  • Said tension controlled pressure reducing valve comprises a diaphragm which diaphragm is m the form of a resilient tube provided with faces connected to said tube. Further, planchettes are placed longitudinally on said tube. Said planchettes are anchored m said tube faces. Said tube controls the distance between a valve plu ⁇ and a seat of a throttlmq device.
  • the tension controlled pressure reducing valve according to this invention provides easy-to-produce, low-weight pressure reducing valves comprising a minimum number of parts.
  • a valve according to this invention does not have any friction surfaces, no lubricating media are used. No massy forged pieces or demanding working are required to produce said valves.
  • the novel pressure reducing valves are easy to set by one element only without any further mechanical operations. Said valves provide d nearly non-varying static secondary pressure set to a determined value situated anywhere within the whole range up to the input primary pressure.
  • the range of the secondary pressure can be set to be within the range from the high primary pressure existing in an attached storage steel bottle, e.g. 40 MPa to 30 MPa, to a secondary pressure in the range from 0.1 to 9 MPa, preferably from 0.1 MPa, to 2.0 MPa, more preferably from 0.2 to 1.0 MPa, whereby, the specific secondary pressure value used depends on the system design and the specific use, e.g. by divers, firemen, industry, etc.
  • the primary pressure can be 30 MPa and the secondary pressure can be 4 to 9 MPa
  • the primary pressure can be 40 MPa and the secondary pressure can be 0.5 to 4 MPa.
  • Figure 1 is a view of a schematic illustration of a valve in the position at rest
  • Figure 2 is a schematic cross-sectional illustration of a valve in the position at rest
  • Figure 3 is a schematic illustration of a valve from figure 1 in the working position when the primary pressure is let in
  • Figure 4 a schematic cross-sectional illustration of a valve in the working position
  • Figure 5 shows a cross-sectional illustration of the exemplified embodiment of an assembled tension controlled pressure reducing valve.
  • a tension controlled pressure reducing valve of the present invention of a particularly preferred embodiment comprises a basic body 1 provided with a threaded input opening 2, eventually, with a not shown threaded opening for a signalling device and a pressure gauge for measuring of gas pressure in the primary pressure space.
  • a part of said basic body 1_ is also a seat of a throttling device which seat separates said primary pressure space from a secondary (reduced) pressure space.
  • said basic body 1 is provided with an output threaded opening 3 used to take away gas at reduced pressure from said secondary space to a not shown second stage.
  • said basic body 1_ can be provided also with another not shown threaded opening used for connecting a supplementary device and/or a safety valve.
  • the tension controlled system is comprised of a diaphragm represented in this particular embodiment by a resilient tube 4.
  • Said tube 4 is provided with an inner cavity and an external surface of circular, square or multigonal cross- sectional shape. (The square one is shown.)
  • Said diaphragm is made of a resilient material, e.g. of silicone rubber and is connected by means of a clip or preferably by a cured joint with a connecting face 5 at one end.
  • Said connecting face 5 and said basic body 1 are provided with a threaded joint used to connect said connecting face 5 of said diaphragm with said basic body 1 at one end.
  • Said tube 4_ is joined with a closing face 6 at the other end.
  • Said tension controlled system comprises also planchettes 7.
  • Said planchettes 1_ are placed longitudinally at the surface of said resilient tube 4. At one end, said planchettes 7 are anchored in a circular cavity of said basic body 1 which body 1 has said connecting face 5 threaded in it. At the other end said planchettes are mounted in a planchette mount 8.
  • planchettes 7 For an eventual increase in the range of the operational overpressure, it is possible to insert additional planchettes 7 into the sector-formed gaps between the cross-sectional polygonal (square in the example shown) faces 5 and 6 and the surrounding circular cavities formed in the basic body 1 and mount 8, respectively.
  • planchettes depends on the specific valve embodiment. Their number can be from 3 to XY. Optimum of their number is 4, both from the manufacture and design reasons. It the number of planchettes is 4, the cross- sectional profile of is a square, if their number is 5, the cross-sectional profile is a pentagon, it their number is 6, the cross-sectional profile is a hexagon, etc. The invention can use any reasonable number of planchettes and the respective cross-sectional profile.
  • a threaded opening is formed in said closing face 6 to provide for an adjustable positioning of said plug 9 of the throttling device.
  • the system is inserted into a protective pipe 1_0.
  • the inner wall of said protective pipe 10 forms a stop for moving of planchettes 7 limiting thereby the maximal deformation of said resilient tube 4.
  • tension controlled pressure reducing valve for gas pressure control, e.g. flow rate (litres/ in) , input pressure, output pressure depend on the intended use.
  • the valve is dimensioned in accordance with the specific requirements in accordance with theories known in the prior art.
  • the diaphragm can be made of any resilient material, preferably of any rubber.
  • the required life cycle, the gas controlled, and the secondary pressure required impose additional obvious requirements on the pressure use. In the embodiment exemplified, silicon rubber was used.
  • Operation of said tension controlled pressure reducing valve consists in expansivity of said diaphragm which is embodied by said resilient tube 4 .
  • Said resilient tube 4 increases in volume in reaction to input pressure of the gas the gas let in, whereby, said planchettes 1_ that are placed longitudinally on the external surface of said resilient tube 4 and that are firmly anchored in said faces 5 and 6 at both ends of said resilient tube 4 bend, whereby, said the distance of both ends of said resilient tube _4 is shortened.
  • said plug 9 bears against said seat situated in said basic body 1 and closes the input of primary pressure into the secondary space situated in the firmly connected basic body 1 .
  • An operation cycle begins in the phase when the valve is open, i.e. the diaphragm (a flexible tube with a tetrahedron surface in this example) and the planchettes placed on its surface and anchored in said circular cavities of the basic body 1 and the mount 8 are straight.
  • the primary pressure let in blows up the circular diaphragm and, simultaneously, the planchettes ]_ placed on the surface of said diaphragm and anchored in said circular cavities bend, whereby, the distance between the ends of said anchored planchettes is shortened.
  • the adjustable plug fixed in said closing face 6 reacts on shortening of this distance by closing the input of primary pressure.
  • the tension controlled pressure reducing valve according to the present invention will find use especially in the field of breathing apparatuses, where the close circuit breathing apparatuses are mainly two-stage ones.
  • air pressure is reduced from the storage bottle pressure, e.g. from 30 MPa, to a lower pressure from 0.1 to 9.0 MPa, preferably from O N to 2.0 MPa more preferably from 0.2 MPa to 1.0 MPa.
  • a not shown second reducing stage can also be attached.
  • valve can be used for any usual gases existing in breathing apparatuses, e.g. air, oxygen, helium, C0 2 , ⁇ 0 2 , etc.
  • gases e.g. air, oxygen, helium, C0 2 , ⁇ 0 2 , etc.
  • the specific gases are determined by the intended use of the valve, i.e a simple control, a breathing apparatus, etc.

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Pulmonology (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Control Of Fluid Pressure (AREA)

Abstract

A tension controlled pressure reducing valve used in gas pressure control which comprises a diaphragm in the form of a resilient tube (4) with connected faces (5 and 6), further with planchettes (7) placed longitudinally on said tube (4) and anchored in said faces (5 and 6) of said tube (4). Said diaphragm controls movement of a plug (9) with regard to a seat of a throttling device.

Description

A TENSION CONTROLLED PRESSURE REDUCING VALVE
Field of the Invention
The present invention relates to a tension controlled pressure reducing valve for gas pressure control, particularly useful m the closed circuit breathing apparatuses, with a fixed setting of the secondary pressure.
Background of the Invention
The prior art pressure reducing valves for gas pressure control usually employ a diaphragm or a piston as the controlling member.
They are produced by means of a demanding working process from a forged piece. A diaphragm valve is adjustable by means of adjustable springs. The valves are also provided with the necessary threaded joints and gaskets. The parts of such valve require to be worked precisely. Large-diameter threaded joints are necessary. Consequently, such valves are rather massy.
Accordingly, it is an object of this invention to overcome the problems of the prior art and particularly to provide easy-to- produce, low-weight pressure reducing valves comprising a minimum number of parts.
It is another object of this invention to provide pressure reducing valves that do not require massy forged pieces and the demanding working of such pieces to be produced. It is yet another object of this invention to provide pressure reducing valves that are easy to set by one element only without any further mechanical operations.
It is yet another object of this invention to provide pressure reducing valves that provide a nearly non-varying static secondary pressure set to a user determined value chosen from the whole range up to the input primary pressure.
Summary of the Invention
The present invention relates to a tension controlled pressure reducing valve for gas pressure control, particularly useful in the closed circuit breathing apparatuses, provided with a fixed setting of the secondary pressure. Said tension controlled pressure reducing valve comprises a diaphragm which diaphragm is m the form of a resilient tube provided with faces connected to said tube. Further, planchettes are placed longitudinally on said tube. Said planchettes are anchored m said tube faces. Said tube controls the distance between a valve pluσ and a seat of a throttlmq device.
It is an advantage of the tension controlled pressure reducing valve according to this invention that it overcomes the problems cf the prior art. Particularly, the invention provides easy-to-produce, low-weight pressure reducing valves comprising a minimum number of parts. A valve according to this invention does not have any friction surfaces, no lubricating media are used. No massy forged pieces or demanding working are required to produce said valves. The novel pressure reducing valves are easy to set by one element only without any further mechanical operations. Said valves provide d nearly non-varying static secondary pressure set to a determined value situated anywhere within the whole range up to the input primary pressure.
The range of the secondary pressure can be set to be within the range from the high primary pressure existing in an attached storage steel bottle, e.g. 40 MPa to 30 MPa, to a secondary pressure in the range from 0.1 to 9 MPa, preferably from 0.1 MPa, to 2.0 MPa, more preferably from 0.2 to 1.0 MPa, whereby, the specific secondary pressure value used depends on the system design and the specific use, e.g. by divers, firemen, industry, etc. In case of the diving breathing apparatus the primary pressure can be 30 MPa and the secondary pressure can be 4 to 9 MPa, in an industrial use the primary pressure can be 40 MPa and the secondary pressure can be 0.5 to 4 MPa.
Brief Description of the Drawings
The invention will be further illustrated by means of the attached drawings where
Figure 1 is a view of a schematic illustration of a valve in the position at rest,
Figure 2 is a schematic cross-sectional illustration of a valve in the position at rest,
Figure 3 is a schematic illustration of a valve from figure 1 in the working position when the primary pressure is let in,
Figure 4 a schematic cross-sectional illustration of a valve in the working position and
Figure 5 shows a cross-sectional illustration of the exemplified embodiment of an assembled tension controlled pressure reducing valve.
Detailed Description of the Invention A tension controlled pressure reducing valve of the present invention of a particularly preferred embodiment comprises a basic body 1 provided with a threaded input opening 2, eventually, with a not shown threaded opening for a signalling device and a pressure gauge for measuring of gas pressure in the primary pressure space. A part of said basic body 1_ is also a seat of a throttling device which seat separates said primary pressure space from a secondary (reduced) pressure space.
Further, said basic body 1 is provided with an output threaded opening 3 used to take away gas at reduced pressure from said secondary space to a not shown second stage. Eventually, said basic body 1_ can be provided also with another not shown threaded opening used for connecting a supplementary device and/or a safety valve.
Opposite to the axis of said seat the proper tension controlled system is connected to the basic body 1 . The tension controlled system is comprised of a diaphragm represented in this particular embodiment by a resilient tube 4. Said tube 4 is provided with an inner cavity and an external surface of circular, square or multigonal cross- sectional shape. (The square one is shown.)
Said diaphragm is made of a resilient material, e.g. of silicone rubber and is connected by means of a clip or preferably by a cured joint with a connecting face 5 at one end. Said connecting face 5 and said basic body 1 are provided with a threaded joint used to connect said connecting face 5 of said diaphragm with said basic body 1 at one end. Said tube 4_ is joined with a closing face 6 at the other end. Said tension controlled system comprises also planchettes 7. Said planchettes 1_ are placed longitudinally at the surface of said resilient tube 4. At one end, said planchettes 7 are anchored in a circular cavity of said basic body 1 which body 1 has said connecting face 5 threaded in it. At the other end said planchettes are mounted in a planchette mount 8.
For an eventual increase in the range of the operational overpressure, it is possible to insert additional planchettes 7 into the sector-formed gaps between the cross-sectional polygonal (square in the example shown) faces 5 and 6 and the surrounding circular cavities formed in the basic body 1 and mount 8, respectively.
Generally, the number of planchettes depends on the specific valve embodiment. Their number can be from 3 to XY. Optimum of their number is 4, both from the manufacture and design reasons. It the number of planchettes is 4, the cross- sectional profile of is a square, if their number is 5, the cross-sectional profile is a pentagon, it their number is 6, the cross-sectional profile is a hexagon, etc. The invention can use any reasonable number of planchettes and the respective cross-sectional profile.
A threaded opening is formed in said closing face 6 to provide for an adjustable positioning of said plug 9 of the throttling device.
To avoid an accidental mechanical damage of the system caused by an excessive overpressure, the system is inserted into a protective pipe 1_0. The inner wall of said protective pipe 10 forms a stop for moving of planchettes 7 limiting thereby the maximal deformation of said resilient tube 4.
The basic characteristics of said tension controlled pressure reducing valve for gas pressure control, e.g. flow rate (litres/ in) , input pressure, output pressure depend on the intended use. The valve is dimensioned in accordance with the specific requirements in accordance with theories known in the prior art.
The specific requirement determine also the materials used , whereby the most common are brass, steel, bronze, titanium etc. The diaphragm can be made of any resilient material, preferably of any rubber. The required life cycle, the gas controlled, and the secondary pressure required impose additional obvious requirements on the pressure use. In the embodiment exemplified, silicon rubber was used.
Operation of said tension controlled pressure reducing valve consists in expansivity of said diaphragm which is embodied by said resilient tube 4 . Said resilient tube 4 increases in volume in reaction to input pressure of the gas the gas let in, whereby, said planchettes 1_ that are placed longitudinally on the external surface of said resilient tube 4 and that are firmly anchored in said faces 5 and 6 at both ends of said resilient tube 4 bend, whereby, said the distance of both ends of said resilient tube _4 is shortened. Thereby, said plug 9 bears against said seat situated in said basic body 1 and closes the input of primary pressure into the secondary space situated in the firmly connected basic body 1 .
An operation cycle begins in the phase when the valve is open, i.e. the diaphragm (a flexible tube with a tetrahedron surface in this example) and the planchettes placed on its surface and anchored in said circular cavities of the basic body 1 and the mount 8 are straight. The primary pressure let in blows up the circular diaphragm and, simultaneously, the planchettes ]_ placed on the surface of said diaphragm and anchored in said circular cavities bend, whereby, the distance between the ends of said anchored planchettes is shortened. The adjustable plug fixed in said closing face 6 reacts on shortening of this distance by closing the input of primary pressure. By take-off of gas at the secondary pressure the pressure in the valve space decreases and the diaphragm releases, whereby, the distance between the ends is prolonged and the plug 9 opens the input opening again, whereby the gas pressure is increased and the cycle is repeated.
Industrial Use
The tension controlled pressure reducing valve according to the present invention will find use especially in the field of breathing apparatuses, where the close circuit breathing apparatuses are mainly two-stage ones. In the first stage air pressure is reduced from the storage bottle pressure, e.g. from 30 MPa, to a lower pressure from 0.1 to 9.0 MPa, preferably from O N to 2.0 MPa more preferably from 0.2 MPa to 1.0 MPa. A not shown second reducing stage can also be attached.
If proper materials are used the valve can be used for any usual gases existing in breathing apparatuses, e.g. air, oxygen, helium, C02, Ν02, etc. The specific gases are determined by the intended use of the valve, i.e a simple control, a breathing apparatus, etc.

Claims

Claim
l.A tension controlled reducing valve for gas pressure control, characterised in that said valve comprises a diaphragm in the form of a resilient tube (4) which tube (4) is connected with faces (5 and 6), further planchettes (7) placed longitudinally on said tube (4) anchored in said faces (5 and 6) of said tube (4), whereby, said diaphragm controls movement of a plug (9) with regard to a seat of a throttling device.
2. A tension controlled reducing valve for gas pressure control according to Claim 1, characterised in that said resilient tube (4) is of circular, square or polygonal cross-sectional external circumference.
3. A tension controlled reducing valve for gas pressure control according to Claims 1 or 2, characterised in that the number of said planchettes corresponds to the number of external sides of said cross-sectional polygonal resilient tube (4) .
4. A tension controlled reducing valve for gas pressure control according to anyone of Claims 1 to 3, characterised in that said primary pressure is from 30 to 40 MPa and/or said secondary pressure is in the range from 0.1 to 9 MPa, preferably from 0.1 MPa, to 2.0 MPa, more preferably from 0.2 to 1.0 MPa.
5. A tension controlled reducing valve for gas pressure control according to anyone of Claims 1 to 4, characterised in that said resilient tube (4) is of silicone rubber. A breathing apparatus using a tension controlled reducing valve for gas pressure control according to anyone of Claims
1 to 5.
PCT/CZ2000/000029 1999-04-28 2000-04-27 A tension controlled pressure reducing valve WO2000067089A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU40982/00A AU4098200A (en) 1999-04-28 2000-04-27 A tension controlled pressure reducing valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZPV1999-1502 1999-04-28
CZ19991502A CZ287231B6 (en) 1999-04-28 1999-04-28 Strain gauge pressure reducing valve

Publications (1)

Publication Number Publication Date
WO2000067089A1 true WO2000067089A1 (en) 2000-11-09

Family

ID=5463376

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2000/000029 WO2000067089A1 (en) 1999-04-28 2000-04-27 A tension controlled pressure reducing valve

Country Status (3)

Country Link
AU (1) AU4098200A (en)
CZ (1) CZ287231B6 (en)
WO (1) WO2000067089A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1367316A2 (en) * 2002-05-17 2003-12-03 Air Products And Chemicals, Inc. Intra-cylinder tubular pressure regulator
DE102005038166A1 (en) * 2005-08-12 2007-02-15 Bälz, Helmut Valve for water, vapor or gaseous media comprises a valve part arranged in a valve housing for influencing a fluid stream and a fluid-actuated contraction element connected to the valve part for controlling the movement
CN109555873A (en) * 2019-01-07 2019-04-02 山东大学 A kind of overall flexibility hinge thick film flow controller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS250347B1 (en) * 1985-05-21 1987-04-16 Miroslav Kder Pressure reducing valve with planchette control
FR2620507A3 (en) * 1987-09-10 1989-03-17 Meva Np BLADE SPRING MANEUVER OF A REDUCTION VALVE USING A BAG
EP0512553A1 (en) * 1991-05-10 1992-11-11 MEVA Roudnice nad Labem Superatmospheric pressure controlled reducing valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS250347B1 (en) * 1985-05-21 1987-04-16 Miroslav Kder Pressure reducing valve with planchette control
FR2620507A3 (en) * 1987-09-10 1989-03-17 Meva Np BLADE SPRING MANEUVER OF A REDUCTION VALVE USING A BAG
EP0512553A1 (en) * 1991-05-10 1992-11-11 MEVA Roudnice nad Labem Superatmospheric pressure controlled reducing valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1367316A2 (en) * 2002-05-17 2003-12-03 Air Products And Chemicals, Inc. Intra-cylinder tubular pressure regulator
EP1367316A3 (en) * 2002-05-17 2006-04-05 Air Products And Chemicals, Inc. Intra-cylinder tubular pressure regulator
US7168445B2 (en) 2002-05-17 2007-01-30 Air Products And Chemicals, Inc. Intra-cylinder tubular pressure regulator
DE102005038166A1 (en) * 2005-08-12 2007-02-15 Bälz, Helmut Valve for water, vapor or gaseous media comprises a valve part arranged in a valve housing for influencing a fluid stream and a fluid-actuated contraction element connected to the valve part for controlling the movement
CN109555873A (en) * 2019-01-07 2019-04-02 山东大学 A kind of overall flexibility hinge thick film flow controller
CN109555873B (en) * 2019-01-07 2023-11-21 山东大学 Integral flexible hinge thick film throttle

Also Published As

Publication number Publication date
AU4098200A (en) 2000-11-17
CZ287231B6 (en) 2000-10-11
CZ150299A3 (en) 1999-12-15

Similar Documents

Publication Publication Date Title
EP1553473B1 (en) Fluid control valve
EP2616722B1 (en) Volume booster with stabilized trim
KR20020039268A (en) Pinch Valve
TWI475168B (en) Fluid controller
EP2689169B1 (en) Bonnet apparatus for use with fluid regulators
JP2004245414A (en) Gas control assembly
AU2001267229A1 (en) Gas flow regulation system
JP2671183B2 (en) Fluid control valve
US5103853A (en) Safety shut off valve for gas cylinders
CA2497387A1 (en) Fluid control device
WO2000067089A1 (en) A tension controlled pressure reducing valve
CA2469418A1 (en) Pneumatic pressure regulator assembly
CN109751426B (en) Dynamic flow balance valve
EP1343064B1 (en) Pressure control valve
CN105765279B (en) Spring controlled valve
CN214662048U (en) Pneumatic type tube burst safety valve
US20050087244A1 (en) Proportional valve
JPH1137317A (en) Ball valve
JP5065110B2 (en) Pressure reducing valve
CN215673788U (en) Low pressure difference structure pilot-operated type pressure reducing valve
JPH0211984A (en) Fluid operation type valve actuator and valve
CN208169620U (en) A kind of air-balance valve
US234264A (en) William d
RU17963U1 (en) MEMBRANE DRIVE
US3490487A (en) Demand pressure-reducing valve,in which the diaphragm tilts the valve head

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU CA CN DE DK IL JP KP PL RU SE SK US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP