[go: up one dir, main page]

WO1996019691A1 - Diaphragm-controlled differential-pressure valve - Google Patents

Diaphragm-controlled differential-pressure valve Download PDF

Info

Publication number
WO1996019691A1
WO1996019691A1 PCT/DK1995/000507 DK9500507W WO9619691A1 WO 1996019691 A1 WO1996019691 A1 WO 1996019691A1 DK 9500507 W DK9500507 W DK 9500507W WO 9619691 A1 WO9619691 A1 WO 9619691A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
diaphragm
housing
cover
spring
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.)
Ceased
Application number
PCT/DK1995/000507
Other languages
French (fr)
Inventor
Jens Jørgen MØLBÆK
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Priority to AU42978/96A priority Critical patent/AU4297896A/en
Priority to PL95320505A priority patent/PL177553B1/en
Priority to RU97112167A priority patent/RU2137005C1/en
Publication of WO1996019691A1 publication Critical patent/WO1996019691A1/en
Priority to FI972571A priority patent/FI109930B/en
Priority to SE9702337A priority patent/SE510431C2/en
Priority to DK199700723A priority patent/DK173245B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G05D16/063—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 a membrane
    • G05D16/0644—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 a membrane the membrane acting directly on the obturator
    • G05D16/0655—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 a membrane the membrane acting directly on the obturator using one spring-loaded membrane
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/365—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a diaphragm
    • 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
    • G05D16/063—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 a membrane

Definitions

  • the invention relates to a diaphragm-controlled differential-pressure valve, having a valve housing which has an inlet, an outlet and a valve seat co ⁇ operating with a closure member, and having a diaphragm loaded by a set-point spring, the outer edge of which diaphragm is fixedly clamped between the lower part and the cover of a diaphragm capsule, the centre of which diaphragm capsule is connected by way of a valve rod to the closure member and which separates an inner and an outer pressure chamber from one another.
  • Such a differential-pressure valve is known, for example, from EP 0 405 339 A2. It has a valve housing having an inlet, outlet and valve seat and, separated therefrom, a diaphragm capsule, the lower part of which has a base for insertion in the valve housing, the base at the same time forming a feed-through for the valve rod joined to the diaphragm and carrying the closure member.
  • the valve rod is of hollow construction. In the region of the feed-through it contains a passage which connects the inner space of the valve housing with the inner pressure chamber and in the region of the diaphragm it is provided with a large cavity in which the set-point spring is arranged.
  • an adjusting means with which the force of the set-point spring can be changed and the travel of the closure member can be limited or the valve completely closed.
  • the lower part of the diaphragm capsule is constructed in one piece with the valve housing and the cover carries a spring housing accommodating the set- point spring.
  • the diameter of the diaphragm is advantageous for the diameter of the diaphragm to be only about at most 20% smaller than the length of the valve housing measured between the inlet and the outlet. In that case, virtually the entire length of the valve housing is utilized for the lower part of the diaphragm capsule. Diaphragms of sufficiently large size can therefore be used.
  • the inner faces of the lower part and the cover advantageously run parallel to one another. In this manner a very flat diaphragm capsule is obtained, which allows a further reduction in the overall height.
  • valve seat in a preferred embodiment, provision is made for the valve seat to be remote from the diaphragm and for the valve rod to pass through the valve seat, to be guided in a bore of the valve housing and to be connected in the diaphragm capsule to the diaphragm.
  • the valve function resulting therefrom is suitable for example, for a differential-pressure valve to be installed in the feed pipe of a heating system.
  • valve housing prefferably has on the side remote from the diaphragm a mounting opening serving for the introduction of the closure member and which can be closed by an insert. In this manner a very simple installation of the closure member is provided.
  • valve housing it is advisable for the valve housing to have on the side remote from the diaphragm an actuator to be operated manually from outside to limit the travel of the closure member or to close the valve.
  • This actuator does not collide with the diaphragm. It can act directly on the closure member. It can also be combined with the insert closing the mounting opening.
  • the valve housing preferably has an opening connecting the inner pressure chamber to the inside of the valve.
  • the inner pressure chamber then acts as a self-pressure chamber. No ducts in the valve rod are required for this.
  • a pressure line connection it is also advantageous for the mouth of a pressure line connection to be arranged in the cover so that it can be closed by the diaphragm.
  • the cover prefferably has a neck portion guiding the set-point spring, to the outside of which neck portion the spring housing is fastened.
  • the neck portion thus has a dual function.
  • the spring housing is constructed in one piece with the cover and has an adjusting spindle rotatable from outside with which a supporting element, held so that it does not rotate, for the spring to bear against is axially adjustable.
  • the set-point can here be continuously changed.
  • Fig. 1 is a longitudinal section through a first embodiment of a differential-pressure valve according to the invention and Fig. 2 is a longitudinal section through a modified embodiment.
  • the differential-pressure valve illustrated in Fig. 1 comprises a valve housing 1 with an inlet 2 and an outlet 3 as well as a valve seat 4.
  • the top side of the valve housing 1 forms the lower part 5 of a diaphragm capsule 6, which extends over virtually the entire axial length of the valve housing 1.
  • a diaphragm 7 is fixedly clamped at its outer edge 8 between the lower part 5 and a cover 9, a crimping edge 10 of the valve housing 1 engaging over the edge of the cover 9.
  • the surfaces of the lower part 5 and the cover 9 facing one another run parallel to one another.
  • the diaphragm 7 divides the diaphragm capsule 9 into an inner pressure chamber 11, which communicates with the external inner chamber 13 of the valve housing 1 by way of an opening 12 in the housing wall, and an outer pressure chamber 14, which is connected by way of a pressure line connection 15 to a pressure sensor 16.
  • the mouth 17 of the pressure line connection is located in a flat portion of the cover 9 where it can be covered, and thus closed, by the diaphragm 7.
  • a set- point spring 18 bears at one end against the end face 19 of a spring housing 20 and at the other end acts on a diaphragm plate 21.
  • the set-point spring 18 is guided by a neck portion 22, on the outside of which there is provided a thread 23 for screwing on the spring housing 20. In this manner a set-point spring 18 can be exchanged in order to provide a particular desired value.
  • the centre of the diaphragm 7 is fixedly clamped between the diaphragm plate 21 and a reinforcing plate 24, a screw 25 holding the two plates 21 and 24 facing against a valve stem 26 which at its opposite end carries a closure member 27 which co-operates with the valve seat 4.
  • the end of the valve rod 26 adjacent to the diaphragm 7 is guided through a bore 28 in the valve housing 1 and is sealed there by a seal 29.
  • the diameter of this bore 28 is the same as the internal diameter of the valve seat 4.
  • the bore 28 and the valve sat 4 can be drilled in one operation.
  • the part 30 of the valve rod 26 adjacent to the closure member 27 has a smaller cross-section than the bore 28. In this manner a valve relieved of pressure is obtained.
  • a mounting opening 31 which is closeable by an screw-in insert 32.
  • an actuator 33 which can be screwed in by means of the rotary knob 34 and is thereby axially displaceable. Using this actuator 33 the travel of the closure member 27 can be limited and, if desired, the valve can also be completely closed.
  • the diaphragm 7 is put into position with the diaphragm plate 21 and the reinforcing plate 24.
  • the valve rod 26 is then introduced through the mounting opening 31 and joined by the screw 25 to the diaphragm centre.
  • the insert 32 is then screwed into the mounting opening 31 and the cover 9 is put into position and secured by crimping over the crimping edge 10.
  • the spring housing 20 can be screwed on. If desired, the valve rod 26 need not be mounted until the cover 9 has been joined to the lower part 5.
  • the spring housing 20 can also be removed during operation.
  • the diaphragm 7 prevents water escaping from inside the valve and by covering the mouth 17 prevents water escaping from the pressure sensor 16.
  • Fig. 2 differs from that of Fig. 1 only in the construction of the cover 35, which is constructed in one piece with a spring housing 36.
  • the set-point spring 37 bears against a supporting element 38, held so that it does not rotate, which is axially adjustable by means of an adjusting spindle.
  • the adjusting spindle 39 has an hexagon socket 40 for rotation and an external thread 41 for axial displacement of the supporting element 38.
  • Such a set-point spring 37 can be adjusted continuously.
  • the inner pressure chamber 11 forms a self-pressure chamber, which is acted upon by the output pressure of the valve.
  • a valve can be installed in particular in the feed pipe of a heating system, the upper pressure chamber 14 being supplied with the return pressure.
  • the basic concept of the invention can also be applied, however to those differential-pressure valves in which the input pressure acts on the inner pressure chamber 11, as is the case, for example, with valves arranged in the return line of a heating system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Driven Valves (AREA)
  • Vehicle Body Suspensions (AREA)
  • Safety Valves (AREA)

Abstract

A diaphragm-controlled differential-pressure valve has a valve housing (1) which is constructed in one piece with the lower part (5) of a diaphragm capsule (6). The associated cover (9) carries a spring housing (20) accommodating the set-point spring (18). This produces a valve having a very small overall height.

Description

Diaphragm-controlled differential-pressure valve.
The invention relates to a diaphragm-controlled differential-pressure valve, having a valve housing which has an inlet, an outlet and a valve seat co¬ operating with a closure member, and having a diaphragm loaded by a set-point spring, the outer edge of which diaphragm is fixedly clamped between the lower part and the cover of a diaphragm capsule, the centre of which diaphragm capsule is connected by way of a valve rod to the closure member and which separates an inner and an outer pressure chamber from one another.
Such a differential-pressure valve is known, for example, from EP 0 405 339 A2. It has a valve housing having an inlet, outlet and valve seat and, separated therefrom, a diaphragm capsule, the lower part of which has a base for insertion in the valve housing, the base at the same time forming a feed-through for the valve rod joined to the diaphragm and carrying the closure member. The valve rod is of hollow construction. In the region of the feed-through it contains a passage which connects the inner space of the valve housing with the inner pressure chamber and in the region of the diaphragm it is provided with a large cavity in which the set-point spring is arranged. In a central extension of the cover there is provided an adjusting means with which the force of the set-point spring can be changed and the travel of the closure member can be limited or the valve completely closed. This construction is of large overall length and takes up a large amount of space in its installed position. The invention is based on the problem of providing a differential-pressure valve of the kind described in the introduction which takes up little space.
That problem is solved according to the invention in that the lower part of the diaphragm capsule is constructed in one piece with the valve housing and the cover carries a spring housing accommodating the set- point spring.
In this construction a separate diaphragm capsule and a coupling between the diaphragm capsule and the valve housing are unnecessary. This results not only in a small overall length but also in a considerable reduction in manufacturing and installation costs.
It is advantageous for the diameter of the diaphragm to be only about at most 20% smaller than the length of the valve housing measured between the inlet and the outlet. In that case, virtually the entire length of the valve housing is utilized for the lower part of the diaphragm capsule. Diaphragms of sufficiently large size can therefore be used.
The inner faces of the lower part and the cover advantageously run parallel to one another. In this manner a very flat diaphragm capsule is obtained, which allows a further reduction in the overall height.
In a preferred embodiment, provision is made for the valve seat to be remote from the diaphragm and for the valve rod to pass through the valve seat, to be guided in a bore of the valve housing and to be connected in the diaphragm capsule to the diaphragm. The valve function resulting therefrom is suitable for example, for a differential-pressure valve to be installed in the feed pipe of a heating system.
It is advantageous in that instance for the valve housing to have on the side remote from the diaphragm a mounting opening serving for the introduction of the closure member and which can be closed by an insert. In this manner a very simple installation of the closure member is provided.
Further advantages are provided by the fact that the part of the valve rod adjacent to the diaphragm passes, sealed, through a bore in the valve housing, the diameter of which is the same as the inner diameter of the valve seat, and the part of the valve rod adjacent to the closure member has a cross-section that is smaller than that of the bore. With such dimensioning a valve relieved of pressure is obtained.
In a further development, it is advisable for the valve housing to have on the side remote from the diaphragm an actuator to be operated manually from outside to limit the travel of the closure member or to close the valve. This actuator does not collide with the diaphragm. It can act directly on the closure member. It can also be combined with the insert closing the mounting opening.
The valve housing preferably has an opening connecting the inner pressure chamber to the inside of the valve. The inner pressure chamber then acts as a self-pressure chamber. No ducts in the valve rod are required for this.
It is also advantageous for the mouth of a pressure line connection to be arranged in the cover so that it can be closed by the diaphragm. When the outer pressure chamber is opened with the differential- pressure valve installed, for example, in order to exchange a set-point spring, sealing occurs automatically. The clamped diaphragm separates the outer pressure chamber from the inside of the valve and also closes the pressure line connection.
It is advisable for the spring housing to be removable and for the set-point spring bearing against its end face to be exchangeable. This leads to a very simple construction in which new desired values can be achieved simply by exchanging a spring.
It is advantageous in that case for the cover to have a neck portion guiding the set-point spring, to the outside of which neck portion the spring housing is fastened. The neck portion thus has a dual function.
Another advantageous alternative consists in that the spring housing is constructed in one piece with the cover and has an adjusting spindle rotatable from outside with which a supporting element, held so that it does not rotate, for the spring to bear against is axially adjustable. The set-point can here be continuously changed.
The invention is explained in further detail hereinafter with reference to preferred embodiments illustrated in the drawing, in which:
Fig. 1 is a longitudinal section through a first embodiment of a differential-pressure valve according to the invention and Fig. 2 is a longitudinal section through a modified embodiment.
The differential-pressure valve illustrated in Fig. 1 comprises a valve housing 1 with an inlet 2 and an outlet 3 as well as a valve seat 4. The top side of the valve housing 1 forms the lower part 5 of a diaphragm capsule 6, which extends over virtually the entire axial length of the valve housing 1. A diaphragm 7 is fixedly clamped at its outer edge 8 between the lower part 5 and a cover 9, a crimping edge 10 of the valve housing 1 engaging over the edge of the cover 9. The surfaces of the lower part 5 and the cover 9 facing one another run parallel to one another.
The diaphragm 7 divides the diaphragm capsule 9 into an inner pressure chamber 11, which communicates with the external inner chamber 13 of the valve housing 1 by way of an opening 12 in the housing wall, and an outer pressure chamber 14, which is connected by way of a pressure line connection 15 to a pressure sensor 16. The mouth 17 of the pressure line connection is located in a flat portion of the cover 9 where it can be covered, and thus closed, by the diaphragm 7. A set- point spring 18 bears at one end against the end face 19 of a spring housing 20 and at the other end acts on a diaphragm plate 21. The set-point spring 18 is guided by a neck portion 22, on the outside of which there is provided a thread 23 for screwing on the spring housing 20. In this manner a set-point spring 18 can be exchanged in order to provide a particular desired value.
The centre of the diaphragm 7 is fixedly clamped between the diaphragm plate 21 and a reinforcing plate 24, a screw 25 holding the two plates 21 and 24 facing against a valve stem 26 which at its opposite end carries a closure member 27 which co-operates with the valve seat 4. The end of the valve rod 26 adjacent to the diaphragm 7 is guided through a bore 28 in the valve housing 1 and is sealed there by a seal 29. The diameter of this bore 28 is the same as the internal diameter of the valve seat 4. The bore 28 and the valve sat 4 can be drilled in one operation. The part 30 of the valve rod 26 adjacent to the closure member 27 has a smaller cross-section than the bore 28. In this manner a valve relieved of pressure is obtained.
On the side of the valve housing lying opposite the diaphragm 7 there is a mounting opening 31 which is closeable by an screw-in insert 32. In the insert there is arranged an actuator 33 which can be screwed in by means of the rotary knob 34 and is thereby axially displaceable. Using this actuator 33 the travel of the closure member 27 can be limited and, if desired, the valve can also be completely closed.
For installation, the diaphragm 7 is put into position with the diaphragm plate 21 and the reinforcing plate 24. The valve rod 26 is then introduced through the mounting opening 31 and joined by the screw 25 to the diaphragm centre. The insert 32 is then screwed into the mounting opening 31 and the cover 9 is put into position and secured by crimping over the crimping edge 10. Once the desired set-point spring 18 has been selected, the spring housing 20 can be screwed on. If desired, the valve rod 26 need not be mounted until the cover 9 has been joined to the lower part 5.
The spring housing 20 can also be removed during operation. The diaphragm 7 prevents water escaping from inside the valve and by covering the mouth 17 prevents water escaping from the pressure sensor 16.
The embodiment of Fig. 2 differs from that of Fig. 1 only in the construction of the cover 35, which is constructed in one piece with a spring housing 36. The set-point spring 37 bears against a supporting element 38, held so that it does not rotate, which is axially adjustable by means of an adjusting spindle. For that purpose the adjusting spindle 39 has an hexagon socket 40 for rotation and an external thread 41 for axial displacement of the supporting element 38. Such a set-point spring 37 can be adjusted continuously.
In both embodiments the inner pressure chamber 11 forms a self-pressure chamber, which is acted upon by the output pressure of the valve. Such a valve can be installed in particular in the feed pipe of a heating system, the upper pressure chamber 14 being supplied with the return pressure. The basic concept of the invention can also be applied, however to those differential-pressure valves in which the input pressure acts on the inner pressure chamber 11, as is the case, for example, with valves arranged in the return line of a heating system.

Claims

Patent Claims
1. A diaphragm-controlled differential-pressure valve, having a valve housing which has an inlet, an outlet and a valve seat co-operating with a closure member, and having a diaphragm loaded by a set-point spring, the outer edge of which diaphragm is fixedly clamped between the lower part and the cover of a diaphragm capsule, the centre of which diaphragm capsule is connected by way of a valve rod to the closure member and which separates an inner and an outer pressure chamber from one another, characterized in that the lower part (5) of the diaphragm capsule (6) is constructed in one piece with the valve housing (1) and the cover (9; 35) carries a spring housing (20; 36) accommodating the set-point spring (18; 37) .
2. A valve according to claim 1, characterized in that the diameter of the diaphragm (7) is only about at most 20% smaller than the length of the valve housing
(1) measured between the inlet (2) and the outlet (3) .
3. A valve according to claim 1 or 2, characterized in that the inner faces of the lower part (5) and the cover (9) run parallel to one another.
4. A valve according to one of claims 1 to 3, characterized in that the valve seat (4) is remote from the diaphragm and the valve rod (26) passes through the valve seat (7) , is guided in a bore (28) of the valve housing (1) and is connected in the diaphragm capsule (6) to the diaphragm (7) .
5. A valve according to one of claims 1 to 4, characterized in that the valve housing (1) has on the side remote from the diaphragm (7) a mounting opening (31) serving for the introduction of the closure member (27) and which is arranged to be closed by an insert (32).
6. A valve according to one of claims 1 to 5, characterized in that the part of the valve rod (26) adjacent to the diaphragm (7) passes, sealed, through a bore (28) in the valve housing (1) , the diameter of which is the same as the inner diameter of the valve seat (4) , and the part (30) of the valve rod (26) adjacent to the closure member (27) has a cross-section that is smaller than that of the bore.
7. A valve according to one of claims 1 to 6, characterized in that the valve housing (1) has on the side remote from the diaphragm (7) an actuator (33) to be operated manually from outside to limit the travel of the closure member (27) or to close the valve.
8. A valve according to one of claims 1 to 7, characterized in that the valve housing (1) has an opening (12) connecting the inner pressure chamber (11) to the inside (13) of the valve.
9. A valve according to one of claims 1 to 8, characterized in that the mouth (17) of a pressure line connection (15) is arranged in the cover (9) so that it is closable by the diaphragm (7) .
10. A valve according to one of claims 1 to 9, characterized in that the spring housing (20) is removable and the set-point spring (18) bearing against its end face is exchangeable. - lO - ll. A valve according to claim 10, characterized in that the cover (9) has a neck portion (22) guiding the set-point spring (18) , to the outside of which neck portion the spring housing (20) is fastened.
12. A valve according to one of claims 1 to 11, characterized in that the spring housing (36) is constructed in one piece with the cover (35) and has an adjusting spindle (39) rotatable from outside with which a supporting element (38) , held so that it does not rotate, for the spring (37) to bear against is axially adjustable.
AMENDED CLAIMS
[received by t e International Bureau on 29 April 1996 (29.04.96); original claims 1-12 replaced by amended claims 1-11 (3 pages)]
1. A diaphragm-controlled differential pressure water valve for heating installations having a valve housing which between an inlet and an outlet has a flow-through channel and in said channel has a valve seat cooperating with a closure member, and having a diaphragm loaded by a set- point spring, the outher edge of said diaphragm is fixedly clamped between the lower part and the cover of a diaphragm capsule, the center of which diaphragm capsule is connected way of a valve rod to the closure member which separates an inner and an outher pressure chamber from one another, whereby the lower part of the diaphragm capsule is constructed in one pease with the valve housing, the cover carries a spring housing accommodating the set point spring and the diameter of the diaphragm is only about at most 20% smaller than the length of the valve housing measured between the inlet and the outlet, characterized in that the lower part (5) of the diaphragm capsule (6) is constructed by the upper side of the valve housing limiting the flow-through channel of the valve and that a crimping edge (10) of the valve housing engages the cover(9) over the edge of the cover.
2. A valve according to claim 1, characterized in that the inner faces of the lower part (5) and the cover (9) run parallel to one another.
3. A valve according to one of claims 1 and 2, characterized in that the valve seat (4) is remote from the diaphragm and the valve rod (26) passes through the valve seat (7), is guided in a bore (28) of the valve housing (1) and is connected in the diaphragm capsule (6) to the diaphragm (7) .
4. A valve according to one of claims 1 to 3, characterized in that the valve housing (1) has on the side remote from the diaphragm (7) a mounting opening
(31) serving for the introduction of the closure member (27) and which is arranged to be closed by an insert
(32) .
5. A valve according to one of claims 1 to 4, characterized in that the part of the valve rod (26) adjacent to the diaphragm (7) passes, sealed, through a bore (28) in the valve housing (1), the diameter of which is the same as the inner diameter of the valve seat (4), and the part (30) of the valve rod (26) adjacent to the closure member (27) has a cross-section that is smaller than that of the bore.
6. A valve according to one of claims 1 to 5, characterized in that the valve housing (1) has on the side remote from the diaphragm (7) an actuator (33) to be operated manually from outside to limit the travel of the closure member (27) or to close the valve.
7. A valve according to one of claims 1 to 6, characterized in that the valve housing (1) has an opening (12) connecting the inner pressure chamber (11) to the inside (13) of the valve.
8. A valve according to one of claims 1 to 7, characterized in that the mouth (17) of a pressure line connection (15) is arranged in the cover (9) so that it is closable by the diaphragm (7) . 9. A valve according to one of claims 1 to 8, characterized in that the spring housing (20) is removable and the set-point spring (18) bearing against its end face is exchangeable.
10. A valve according to claim 9, characterized in that the cover (9) has a neck portion (22) guiding the set-point spring (18), to the outside of which neck portion the spring housing (20) is fastened.
11. A valve according to one of claims 1 to 10, characterized m that the spring housing (36) is constructed in one piece with the cover (35) and has an adjusting spindle (39) rotatable from outside with which a supporting element (38), held so that it does not rotate, for the spring (37) to bear against is axially adjustable.
PCT/DK1995/000507 1994-12-20 1995-12-18 Diaphragm-controlled differential-pressure valve Ceased WO1996019691A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU42978/96A AU4297896A (en) 1994-12-20 1995-12-18 Diaphragm-controlled differential-pressure valve
PL95320505A PL177553B1 (en) 1994-12-20 1995-12-18 Membrane-type regulating valve
RU97112167A RU2137005C1 (en) 1994-12-20 1995-12-18 Valve controlled by means of diaphragm depending on pressure differential
FI972571A FI109930B (en) 1994-12-20 1997-06-17 Diaphragm-controlled differential pressure relief valve
SE9702337A SE510431C2 (en) 1994-12-20 1997-06-18 Diaphragm-controlled differential pressure valve
DK199700723A DK173245B1 (en) 1994-12-20 1997-06-19 Diaphragm controlled differential pressure valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4445588A DE4445588C2 (en) 1994-12-20 1994-12-20 Diaphragm controlled differential pressure valve
DEP4445588.7 1994-12-20

Publications (1)

Publication Number Publication Date
WO1996019691A1 true WO1996019691A1 (en) 1996-06-27

Family

ID=6536450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000507 Ceased WO1996019691A1 (en) 1994-12-20 1995-12-18 Diaphragm-controlled differential-pressure valve

Country Status (7)

Country Link
AU (1) AU4297896A (en)
DE (1) DE4445588C2 (en)
FI (1) FI109930B (en)
PL (1) PL177553B1 (en)
RU (1) RU2137005C1 (en)
SE (1) SE510431C2 (en)
WO (1) WO1996019691A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19623718C1 (en) * 1996-06-14 1998-01-08 Basf Lacke & Farben Control valve for fluid, especially gaseous medium e.g. for gas turbine
CA2312122A1 (en) * 2000-06-23 2001-12-23 Erick Girouard Gas flow regulation system
CA2312237A1 (en) 2000-06-23 2001-12-23 Erick Girouard Pressure regulator
RU2206013C2 (en) * 2000-10-27 2003-06-10 Общество с ограниченной ответственностью "Тепловодоэнергосберегающие технологии" Pressure differential regulator
DE102006045063B8 (en) * 2006-09-21 2010-02-11 Peter Dipl.-Ing. Behr For installation in a valve housing provided device for limiting quantities, provided for the heating area thermostatic valve and provided for the sanitary area Vorabsperrventil
DE102006057549B4 (en) 2006-12-06 2010-06-24 Nord-Micro Ag & Co. Ohg Control unit for actuating a pressure valve, in particular a differential pressure valve of an aircraft cabin
DK178871B1 (en) * 2015-11-05 2017-04-10 Danfoss As Valve with detachable regulation unit
DK179665B1 (en) * 2017-11-10 2019-03-13 Danfoss A/S Pressure controlled valve
DE102023121396A1 (en) * 2023-08-10 2025-02-13 Nord-Micro Gmbh & Co. Ohg control unit for controlling a valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1809220A1 (en) * 1968-11-15 1970-06-11 Parker Hannifin Corp Pressure control valve
EP0220599A2 (en) * 1985-10-31 1987-05-06 DruVa-Armaturen GmbH Pressure reducing valve
EP0354427A2 (en) * 1988-08-11 1990-02-14 Milan Medvescek Differential pressure control valve
EP0398858A2 (en) * 1989-05-15 1990-11-22 Fisher Controls International, Inc. Boost modified, droop compensated direct acting pressure regulator
WO1992010798A1 (en) * 1990-12-04 1992-06-25 Mcmanigal Paul G Accurate high-flow clean regulator with input-pressure balancing

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7222729U (en) * 1972-12-07 Deutsche Vergaser Gmbh & Co Kg Flow control valve for fluids
DE383714C (en) * 1923-10-16 Northern Equipment Co Device for regulating and measuring liquids or gases flowing in closed pipes
DE1498461A1 (en) * 1965-09-29 1968-11-28 Scheer & Cie C F Liquid volume regulator
GB1132829A (en) * 1966-09-12 1968-11-06 Ici Ltd Reducing valve
US3872877A (en) * 1972-10-18 1975-03-25 Robertshaw Controls Co Fuel control system and pressure regulator construction therefor and method for operating the same
JPS5471432A (en) * 1977-11-17 1979-06-08 Sotokazu Rikuta Flow rate constant value automatic control valve
DE59004660D1 (en) * 1989-06-26 1994-03-31 Milan Medvescek Diaphragm controlled differential pressure control valve.
DE4035179A1 (en) * 1990-11-06 1992-05-07 Wahler Gmbh & Co Gustav THERMOSTAT VALVE FOR CONTROLLING THE TEMPERATURE OF THE COOLANT OF AN INTERNAL COMBUSTION ENGINE
DE4203370C2 (en) * 1992-02-06 1996-05-23 Heimeier Gmbh Metall Theodor Connecting a valve stem to a valve body and method of making the connection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1809220A1 (en) * 1968-11-15 1970-06-11 Parker Hannifin Corp Pressure control valve
EP0220599A2 (en) * 1985-10-31 1987-05-06 DruVa-Armaturen GmbH Pressure reducing valve
EP0354427A2 (en) * 1988-08-11 1990-02-14 Milan Medvescek Differential pressure control valve
EP0398858A2 (en) * 1989-05-15 1990-11-22 Fisher Controls International, Inc. Boost modified, droop compensated direct acting pressure regulator
WO1992010798A1 (en) * 1990-12-04 1992-06-25 Mcmanigal Paul G Accurate high-flow clean regulator with input-pressure balancing

Also Published As

Publication number Publication date
SE9702337L (en) 1997-06-18
RU2137005C1 (en) 1999-09-10
PL177553B1 (en) 1999-12-31
PL320505A1 (en) 1997-10-13
AU4297896A (en) 1996-07-10
SE9702337D0 (en) 1997-06-18
DE4445588A1 (en) 1996-06-27
DE4445588C2 (en) 2002-12-05
FI109930B (en) 2002-10-31
FI972571A0 (en) 1997-06-17
SE510431C2 (en) 1999-05-25
FI972571L (en) 1997-06-17

Similar Documents

Publication Publication Date Title
RU2509943C2 (en) Housing of balanced channel with built-in flow conditioning
US5230366A (en) Automatic fluid flow control device
RU98121811A (en) COLLECTOR / DISTRIBUTION DEVICE FOR COMBUSTIBLE GAS COMING FROM A LOT OF LIQUID GAS CAPSULES
JP4666280B2 (en) Stopcock device with pressure adjusting function, faucet device and hot-water mixed faucet device having the same
GR3007499T3 (en)
ES2033057T3 (en) CLOSING AND REGULATION VALVE.
WO1996019691A1 (en) Diaphragm-controlled differential-pressure valve
AU3513895A (en) Valve for a system having a heat carrying medium
RU2000129145A (en) GAS VALVE AND METHOD OF GAS PULSE SUPPLY
US3907249A (en) Valve device for restricting the flow of a liquid by a helical flow passage
AU647773B2 (en) Apparatus for measurement and control, respectively, of temperature and/or pressure
SK331892A3 (en) Radiator's valve
TR201810699T4 (en) Balancing valve.
JPS5894537A (en) Single handle hot water mixing spigot
US2878830A (en) Fluid control
US3926211A (en) Fluid flow control valve
JP3022751B2 (en) Stopcock with pressure reducing valve
WO1996019690A1 (en) Diaphragm-controlled valve
DK173245B1 (en) Diaphragm controlled differential pressure valve
EP1281014B1 (en) Mixing valve
JP3713189B2 (en) Valve device
JP2001147724A (en) Pressure reducing valve
JP2009186014A (en) Stop cock device
GB2151752B (en) Gas flow regulating assembly
GB2225089A (en) Pressure switch safety valve

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IS JP KG KR KZ LT LU LV MD MX NO NZ PL PT RO RU SE SG SI SK TJ UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

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

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 972571

Country of ref document: FI

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
WWG Wipo information: grant in national office

Ref document number: 972571

Country of ref document: FI