CZ394A3 - Valve system - Google Patents

Valve system Download PDF

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Publication number
CZ394A3
CZ394A3 CZ943A CZ394A CZ394A3 CZ 394 A3 CZ394 A3 CZ 394A3 CZ 943 A CZ943 A CZ 943A CZ 394 A CZ394 A CZ 394A CZ 394 A3 CZ394 A3 CZ 394A3
Authority
CZ
Czechia
Prior art keywords
valve
piston
valve housing
valve chamber
pressure
Prior art date
Application number
CZ943A
Other languages
Czech (cs)
Other versions
CZ281436B6 (en
Inventor
Eskil Aurel
Original Assignee
Flaekt Ab
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
Priority to SE9102082A priority Critical patent/SE468721B/en
Application filed by Flaekt Ab filed Critical Flaekt Ab
Priority to PCT/SE1992/000453 priority patent/WO1993001433A1/en
Publication of CZ394A3 publication Critical patent/CZ394A3/en
Publication of CZ281436B6 publication Critical patent/CZ281436B6/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0057Regenerating the filter material in the filter
    • B01D46/0067Regenerating the filter material in the filter by acting counter-currently on the filtering surface (e.g. flushing)
    • B01D46/0068Regenerating the filter material in the filter by acting counter-currently on the filtering surface (e.g. flushing) with pressurised gas, e.g. pulsed air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/40Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
    • F16K31/402Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a diaphragm
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/40Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
    • F16K31/406Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/04Arrangement or mounting of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0305Bosses, e.g. boss collars
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323Valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0341Filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0382Constructional details of valves, regulators
    • F17C2205/0385Constructional details of valves, regulators in blocks or units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107Single phase
    • F17C2223/0123Single phase gaseous, e.g. CNG, GNC
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2250/00Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06Controlling or regulating of parameters as output values
    • F17C2250/0605Parameters
    • F17C2250/0626Pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2270/00Applications
    • F17C2270/05Applications for industrial use

Abstract

A valve arrangement has a valve housing (4) with a valve chamber (12) formed therein, which has an outlet (13) and an inlet (23) which is adapted to be connected to a pressure-medium source (1). A control valve (10, 26) is adapted, when in closed position, to close the outlet (13) of the valve chamber (12) and, when in open position, to open it. A main valve arranged in the valve housing has a valve member which is displaceable in the valve chamber and, depending on the pressure in the valve chamber, is shiftable between an outer closing position and an inner opening position. The valve member consists of a piston (22) freely displaceable in a circular-cylindrical portion (15) of the valve housing (4). The inlet of the valve chamber consists of an annular gap (23) between the piston (22) and the circular-cylindrical portion (15) of the valve housing (4).

Description

BACKGROUND OF THE INVENTION The invention relates to a valve assembly comprising a valve housing having a valve chamber formed in a valve housing and having an outlet and an inlet adapted to communicate with a pressure source, a control valve adapted to close the outlet of the valve chamber in its closed position; , and a main valve having a valve member that is movable in the valve chamber and which is movable depending on the pressure in the valve chamber between the outer closing position and the inner open position.

BACKGROUND OF THE INVENTION

Prior art valve assemblies of this kind are used to supply compressed air pulses to bag-shaped filter elements in filter devices for cleaning contaminated gases. Compressed air pulses are supplied to the interior of the bag-like filter elements to remove the dust from the bulk dust by knocking or shaking to clean contaminated gases. In such cases, the valve assemblies are mounted on compressed air pressure vessels. The wall of the pressure vessel is provided with a through hole through which the valve member of the main valve extends inwardly and abuts in its closing position on the valve seat arranged in the pressure vessel for compressed air at one end of the pressure tube. This tube exits the compressed air pressure vessel to transmit compressed air pressure pulses inside the filter element when the valve member is temporarily moved to its internal open position.

In known valve systems, the main valve is provided with a circular diaphragm clamped between the valve housing and the wall of the pressurized air pressure vessel and overlapping the through-hole in the pressure vessel. The valve member is mounted on the outside of the diaphragm and is surrounded by an annular portion of the diaphragm which is provided with through-holes through the valve chamber inlet and provides a connection between the compressed air pressure vessel and the valve chamber. In known valve systems, the outlet of the valve chamber is formed by an annular slot that opens to the outside of the valve housing. This slot is closed when the control valve is in its closed position and opens when the control valve is in its open position.

When the valve member of the main valve is in its closing position, it is maintained in contact with the valve seat by the pressure exerted in the valve chamber, which is connected through the through-holes through the diaphragm with the pressure vessel for the compressed air. This achieves the same pressure in the valve chamber as in the pressure vessel, but since the pressure acts on a larger area than the pressure in the pressure vessel for compressed air, the diaphragm is forced out of the valve chamber so that the valve member is pushed towards its closing position.

When the control valve is open, the air in the valve chamber flows outwardly through the annular gap and the pressure in the valve chamber decreases so that the pressure in the compressed air tank pushes the diaphragm into the valve chamber to open the main valve by moving the valve member to its internal opening position . If the control valve closes shortly thereafter, the pressure inside the valve chamber rises again due to the air supply through the through-holes in the diaphragm, the main valve being closed by the valve member moving to its closing position.

In the known valve assembly, the valve member is made of plastic and is secured to the outside of the diaphragm by means of fastening screws that pass through a plastic washer located on the inside of the diaphragm, through the middle of the diaphragm, and the valve member. The main valve is thus very complicated in design, as it consists of a large number of parts. In addition, the connecting bolts and nuts can be attacked by corrosion in the environment in which the filter elements and thus the valve elements are located. Due to the corrosion of the fastening screws, the valve member and the plastic washer can easily be released, especially when subjected to vibrations. The diaphragm is also difficult to clamp between the valve housing and the wall of the pressurized air container, since this clamping has to be adjusted very precisely to the length of the diaphragm stroke during its operation, i.e. to the valve seat on the pressure tube. These known valve system designs also have the disadvantage of the risk of easily damaging the diaphragm, particularly at the point of the through-holes.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a new valve system design whose main valve would have a substantially simpler design than the main valves of known valve systems, with high corrosion resistance and in which areas of potential breakage represented by leakage openings would be removed.

SUMMARY OF THE INVENTION

This object is solved by a valve assembly according to the invention comprising a valve housing with a valve chamber, a control valve and a main valve having a valve member movable within the valve chamber; The principle of the invention is characterized in that the valve member consists of a piston freely displaceable in the cylindrical part of the valve housing, the inlet of the valve chamber consisting of an annular gap between the piston and the cylindrical part of the valve housing.

In a preferred embodiment of the invention, the cylindrical portion of the valve housing extends so far in the axial direction of the piston that it surrounds at least a major portion of the piston in its axial direction even when the piston is in its closing position. In particular, the cylindrical part of the valve housing surrounds the entire piston in the axial direction and is provided with pressurized fluid passages at the free end of its wall.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a cross-section of the valve assembly according to the invention in a closed position; and FIG. 2 shows a cross-section of the valve assembly in an open position.

DETAILED DESCRIPTION OF THE INVENTION

The valve assembly of the invention shown in the exemplary embodiment of Figures 1 and 2 is used to supply compressed air pulses to vertically arranged bag-like filter elements, not shown in these examples, which are part of a filter device for cleaning contaminated gases. The valve assembly is mounted on the pressure vessel 1, above a circular opening 2 formed in the upper wall of the pressure vessel 1. The pressure vessel 1 is in this exemplary embodiment a compressed air vessel.

The vertical pressure pipe 2, which is coaxial with the orifice 2, extends through the bottom wall of the compressed air vessel 1 inside the pressure vessel 1 and is open at a certain distance below the orifice 2. The upper end of the pressure tube 2 is a valve seat 3a and the end 3b is open on the outside of the pressure vessel 1 to be connected to the openings of the bag-like filter elements.

The valve assembly is provided with an aluminum valve housing 4 consisting of two coaxial circular coaxial parts, namely the upper part 4a and the cylindrical lower part 4b provided with an external thread, which are screwed together with the intermediate spacers (not shown). In the annular bore 2, a female threaded sleeve 5 is received and fixed by welding, in which the cylindrical lower part 4b is screwed. The cylindrical lower part 4b is provided with an annular upper flange 6 which abuts the upper end of the sleeve 5 when the cylindrical lower part 4b is screwed fully into the sleeve 5. A sealing ring 7 is disposed between the lower part 4b and the sleeve 5.

The upper part 4a is provided on its underside with a first cup-shaped recess 8 with a circular circumference and the lower part 4b is provided on its upper side with a second cup-shaped recess 9 with a circular circumference. Placed between the upper part 4a and the lower part 4b is a planar circular plate or planar disk 10, which abuts against the walls of the two recesses 8, 9, sealed by its two annular surfaces on its opposite sides, as seen in FIG. 1. This planar disc 10 can be bent upwardly into the position shown in Fig. 2, in which the sealed seating of the planar disc 10 on the wall of the second cup recess 9 is removed and an annular connection 11 is formed between the interior of the lower part 4b forming the valve chamber 12 an annular slot 13 which is formed by means of spacers interposed between the upper part 4a and the lower part 4b of the valve housing 4. The annular slot 13 communicates with the outer space around the valve housing 4.

The cylindrical lower portion 4b is provided with an upper portion 14 in which a second cup-shaped recess 9 is formed and a cylindrical lower portion 15 having a larger internal diameter than the upper portion 14. An annular annular portion is formed between the upper portion 14 and the cylindrical lower portion 15. an abutment 16 on which the annular washer 17 is held, held in position by a plastic washer 18, which is snapped into the annular groove 19 in the inner wall of the cylindrical lower part 15. This snap is reached by a second annular groove 20 formed in the underside of the plastic washers 18 adjacent to its perimeter. A plurality of radial grooves 21 are formed in the underside of the plastic washer 18.

In the lower part 15 of the lower part 4b there is a valve member formed in the form of a cylindrical piston 22 having a substantially U-shaped longitudinal section. The cylindrical piston 22 is made of glass fiber reinforced plastic and thus has good heat resistance and resistance against corrosion. The outer diameter of the cylindrical piston 22 is somewhat smaller than the inner diameter of the cylindrical lower portion 15 to form an annular gap 23 between the cylindrical piston 22 and the inner wall of the cylindrical lower portion 15. The annular gap 23, shown for greater clarity in the embodiments The cylindrical piston 22 forms the main valve of the valve assembly and is freely displaceable between its external closing position, in which it sits tightly against the valve seat 3a. 1 and the inner open position of FIG. 2 in which it is lifted above the valve seat 3a and in its upper end abuts the plastic washer 18, which together with the rubber annular washer 17 forms a damping unit .

The upper part 4a is provided with an axially oriented through hole 24 forming an outlet from the first cup-shaped recess 8. The upper part 4a is also provided with a radial groove on its upper side

25. A solenoid valve is also mounted on the upper part 4a

26, shown only schematically, which is intended to provide a connection between the through hole 24 and the radial groove 25 in the open position of the valve assembly, and which prevents this connection in the closed position of the valve assembly. In the closed position of the valve assembly shown in Fig. 1, the electromagnetic valve 26 is in the closed position. The planar disc 10 is provided with a through hole 27 which provides a connection between the first cup recess 8 and the valve chamber 12. The planar disc 10 and the solenoid valve 26 together form a control valve of the valve assembly of the invention.

If the valve assembly is to be moved from the closed position shown in FIG. 1 to an open position for supplying a short-time pressure air pulse to the bag-like filter elements via a pressure tube, the solenoid valve 26 opens to establish a through connection between the first cup recess 8 and the surrounding atmosphere. The flat disc 10 is then bent to the position shown in FIG. 2. This results in opening the outlet of the valve chamber 12 formed by the annular connection 11 and the annular slot 13 which are in the position shown in FIG. 2. The pressure inside the valve chamber 12 is thereby reduced. so that the main valve is opened by a cylindrical piston 22 forming a valve member moving to the position shown in FIG. 2 in which it engages a damping unit consisting of an annular washer 17 and a plastic washer 18, and in which the upper outlet port of the pressure Pipes 3. ·

If the valve assembly is to be moved from the open position to the closed position of FIG. 2, the solenoid valve 26 closes, so that in the first cup-shaped recess 8 the pressure rises through the air inlet 27 in the plane disc 10. The plane disc 10 then returns to its plane 1, in which the annular connection 11 and the annular gap 13 are closed. The pressure in the valve chamber 12 is then restored by supplying compressed air through the annular gap 23 and the radial grooves 21 in the underside of the plastic washer 18 so that the main valve is closed.

As can be seen from the drawings, the cylindrical lower section 15 with a circular cross-section extends down to the level of the upper end of the pressure tube 3 so that the entire cylindrical piston 22, as seen in its axial direction, is surrounded by the lower section 15 of the valve housing 4 the piston 22 is in its closing position. This arrangement results in accurate guidance of the cylindrical piston 22 throughout its displaceable movement, thereby eliminating the risk of jamming. The lower part 15 of the valve housing 4 is provided at its lower end with a series of recesses 28 which prevent unwanted throttling of the compressed air flow as it passes from the pressure vessel 1 to the pressure tube 3 when the main valve is opened.

Claims (4)

  1. A valve assembly comprising a valve housing (4) with a valve chamber (12) formed in the valve housing (4) and having an outlet (11, 13) and an inlet (23) adapted to communicate with a pressure source (1), a control valve (10, 26) adapted to close the outlet (13) of the valve chamber (12) in its closed position and to open the outlet (13) in its open position, and a main valve having a valve member (22) movable in the valve chamber (12) and which is displaceable as a function of the pressure in the valve chamber (12) between the outer closing position and the inner open position, characterized in that the valve member consists of a piston (22) freely displaceable in the cylindrical portion (15) of the valve housing (12) 4), wherein the inlet of the valve chamber (12) consists of an annular gap (23) between the piston (22) and the cylindrical portion (15) of the valve housing (4).
  2. Valve assembly according to claim 1, characterized in that the cylindrical part (15) of the valve housing (4) extends so far in the axial direction of the piston (22) that it surrounds at least the main part of the piston (22) in its axial direction as well. when the piston (22) is in its closing position.
  3. Valve assembly according to claim 2, characterized in that the cylindrical part (15) of the valve housing (4) surrounds the entire piston (22) in its axial direction when the piston (22) is moved to its closing position.
  4. Valve assembly according to claim 3, characterized in that the cylindrical part (15) of the valve housing (4) is provided with pressurized fluid passages (28) at the free end of its wall.
CZ943A 1991-07-04 1992-06-23 Valve system CZ281436B6 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9102082A SE468721B (en) 1991-07-04 1991-07-04 Valve device foer generating short pulses of compressed air for example foer renblaasning of filter elements paasformiga
PCT/SE1992/000453 WO1993001433A1 (en) 1991-07-04 1992-06-23 Valve arrangement

Publications (2)

Publication Number Publication Date
CZ394A3 true CZ394A3 (en) 1994-05-18
CZ281436B6 CZ281436B6 (en) 1996-09-11

Family

ID=20383250

Family Applications (1)

Application Number Title Priority Date Filing Date
CZ943A CZ281436B6 (en) 1991-07-04 1992-06-23 Valve system

Country Status (15)

Country Link
US (1) US5533706A (en)
EP (1) EP0678177B1 (en)
JP (1) JPH06509155A (en)
AT (1) AT171531T (en)
AU (1) AU662918B2 (en)
BR (1) BR9206239A (en)
CA (1) CA2112359A1 (en)
CZ (1) CZ281436B6 (en)
DE (1) DE69227132T2 (en)
DK (1) DK0678177T3 (en)
FI (1) FI101010B (en)
NO (1) NO301665B1 (en)
RU (1) RU2101599C1 (en)
SE (1) SE468721B (en)
WO (1) WO1993001433A1 (en)

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DE2811879C2 (en) * 1978-03-18 1982-04-15 Carl Heinz Dipl.-Ing. 4050 Moenchengladbach De Haefele
US5090659A (en) * 1989-01-19 1992-02-25 Bronnert Herve X Pressure responsive diaphragm control valve
US4913397A (en) * 1989-01-19 1990-04-03 Bronnert Herve X Pressure responsive diaphragm control valve
SE466362B (en) * 1990-06-21 1992-02-03 Flaekt Ab Valve device, Spec foer compressed air pulses of varying operating data

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Publication number Publication date
FI101010B (en) 1998-03-31
FI940004A0 (en) 1994-01-03
CZ281436B6 (en) 1996-09-11
AU662918B2 (en) 1995-09-21
SE9102082L (en) 1993-01-05
JPH06509155A (en) 1994-10-13
SE9102082D0 (en) 1991-07-04
NO940007L (en) 1994-01-03
DK0678177T3 (en) 1999-06-14
AT171531T (en) 1998-10-15
EP0678177B1 (en) 1998-09-23
CA2112359A1 (en) 1993-01-21
AU2290892A (en) 1993-02-11
SE468721B (en) 1993-03-08
NO940007D0 (en) 1994-01-03
BR9206239A (en) 1995-10-10
US5533706A (en) 1996-07-09
WO1993001433A1 (en) 1993-01-21
FI940004A (en) 1994-01-03
DE69227132D1 (en) 1998-10-29
DK678177T3 (en)
NO301665B1 (en) 1997-11-24
EP0678177A1 (en) 1995-10-25
DE69227132T2 (en) 1999-04-15
FI101010B1 (en)
RU2101599C1 (en) 1998-01-10
FI940004D0 (en)

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