EP2778554A1 - Clapet de fermeture destiné à être utilisé dans une conduite d'une installation de ventilation ou d'une installation de désenfumage mécanique - Google Patents

Clapet de fermeture destiné à être utilisé dans une conduite d'une installation de ventilation ou d'une installation de désenfumage mécanique Download PDF

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Publication number
EP2778554A1
EP2778554A1 EP20130158622 EP13158622A EP2778554A1 EP 2778554 A1 EP2778554 A1 EP 2778554A1 EP 20130158622 EP20130158622 EP 20130158622 EP 13158622 A EP13158622 A EP 13158622A EP 2778554 A1 EP2778554 A1 EP 2778554A1
Authority
EP
European Patent Office
Prior art keywords
flap
butterfly valve
valve according
seal
layer
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.)
Withdrawn
Application number
EP20130158622
Other languages
German (de)
English (en)
Inventor
Peter Vogelsang
Christian GLATZ
Michael Weise
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.)
Gebrueder Trox GmbH
Original Assignee
Gebrueder Trox GmbH
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 Gebrueder Trox GmbH filed Critical Gebrueder Trox GmbH
Priority to EP20130158622 priority Critical patent/EP2778554A1/fr
Publication of EP2778554A1 publication Critical patent/EP2778554A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/12—Hinged dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
    • F24F11/35—Responding to malfunctions or emergencies to fire, excessive heat or smoke by closing air passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/30—Details or features not otherwise provided for comprising fireproof material

Definitions

  • the invention relates to a butterfly valve for use in a line of a ventilation system or a mechanical smoke extraction system (MRA) comprising a housing, in particular a quadrangular cross-section having a housing wall and a pivotally mounted in the housing about a pivot axis flap, wherein in the Housing at least one stop is provided as a plant of the flap in its closed position, wherein the stop on the side facing in the closed position of the flap, a recess which is preferably formed extending over the entire length of the stop extending.
  • MRA mechanical smoke extraction system
  • shut-off valves should complete the flow cross section in the closed position and prevent a flow of air. However, especially at high pressure differences between the two sides of the flap leaks occur so that air and / or smoke can flow in the closed position on the opposite side of the flap (can).
  • the object of the invention is to avoid the aforementioned disadvantages and to provide a butterfly valve, which has a high airtightness even at higher temperatures both in the cold state and in the hot state in the closed position.
  • an intumescent material with the corresponding layer or a non-combustible mineral fiber-containing material with the corresponding layer can be provided in the recess.
  • an intumescent material and a non-combustible mineral fiber-containing material with the respective layer in the direction of the cross section of the butterfly valve are arranged side by side.
  • the intumescent material may be, for example, a foam made of an organic intumescent material which, in the event of fire, forms a heat-insulating foam which, due to its increase in volume, closes any interstices.
  • the intumescent material may be formed depending on the existing space as a plate, as a strip or as a molded part.
  • the non-combustible mineral fiber-containing material may be formed as a mineral fiber foam, wherein at least in the closed position of the flap facing region has a non-combustible layer.
  • This layer may be formed as a glass fabric.
  • the glass fabric may, for example, be coated and consist of textile glass fibers or glass filaments with and without selenium.
  • the seal between the flap and each provided in the stop sealing system is almost airtight.
  • the embodiments according to the invention bring about a virtually airtight seal even at high differential pressures both in the cold state and in the hot state.
  • a cold seal is understood to mean a seal at a temperature which corresponds approximately to the prevailing ambient temperature. With a hot seal, temperatures can easily reach up to 1000 ° C or more.
  • the housing may for example have a round or a square housing cross-section.
  • Each stop preferably extends into the region of the pivot axis, so that the flap in its open position preferably bears against the ends of each stop.
  • each stopper is preferably formed as a "U" and has a base portion and two side portions, wherein at each end of the base portion adjacent each side portion. The base portion is aligned parallel to the pivot axis, while the two side portions are aligned perpendicular to the pivot axis.
  • the combination of the intumescent material and the layer is comparable to a kind of swelling buffer.
  • the intumescent material inflates with increasing temperature at about 100-150 ° C.
  • the layer which has a melting point of more than 1000 ° C, preferably more than 1400 ° C, protects the intumescent material from the action of temperature. Further, the layer serves as an additional seal against the flap as the intumescent material inflates.
  • the seal between the flap and the protruding seal is nearly airtight.
  • the above seal is advantageously formed elastically so that it is compressed when the flap.
  • the above seal preferably has a very high melting point.
  • the above seal may for example consist of a non-combustible mineral fiber foam as a core, which is covered with a coated sheath, such as a Glasgewebeummantelung, as a shell.
  • the above seal can also consist only of a glass fabric.
  • the glass cloth jacket can consist of textile glass fibers or glass filaments with and without selenium.
  • Such a protruding seal has good fire protection properties with good and elastic sealing function.
  • the above seal causes both in the cold state and in the hot state, a nearly airtight seal even at high differential pressures.
  • intumescent in particular slightly intumescent
  • material in particular slightly intumescent
  • a parallel to the orientation of the flow direction relative to the layer projecting seal is provided, wherein the flap is formed sealingly cooperating in the closed position with the protruding seal.
  • the gasket protruding from the layer 12 and / or the layer 12a is designed as a hollow profile, in particular as a hollow profile designed as a tubular profile.
  • the above seal may be formed, for example, as a fabric tube seal or lip seal.
  • a fabric tube seal is shaped round.
  • a lip seal is characterized in that, for example, a coated glass fabric sheath, on the inside of which a non-combustible mineral fiber foam is arranged, is formed into a loop or lip.
  • a fleece may be provided.
  • Such a nonwoven fabric may be formed, for example, as a high-temperature glass wool mat.
  • a high-temperature glass wool mat is made of silicate fibers and has a high temperature resistance and low thermal conductivity. The melting point is greater than 1350 ° C, with the long-term temperature resistance is about 1000 ° C.
  • the main components of such a high temperature glass wool mat are SiO 2 (60-80 wt .-%) and CaO and MgO (19-40 wt .-%), wherein the apparent density between 50 and 300 kg / m 3 .
  • a high temperature glass wool mat is easy to machine by cutting, for example.
  • the flap has a seal projecting outward over its circumference.
  • This outwardly projecting seal is a type of sliding seal that is temperature resistant.
  • the melting point is more than 1000 ° C, preferably more than 1400 ° C.
  • the outwardly over the circumference of the flap protruding seal additionally counteracts leakage. Moreover, it protects the underlying sealing package consisting of the intumescent material, the layer and the protruding, preferably tube-like, seal, against radiant heat.
  • the outwardly projecting seal may be formed as a nonwoven.
  • the nonwoven fabric may consist, for example, of a mat of textile glass fibers with a SiO 2 content of greater than 93%.
  • the melting point of such textile glass fibers is about 1600 ° C, wherein the apparent density is about 015 g / cm 3 .
  • the nonwoven may have a width of about 50 mm in its original form.
  • the fleece is then folded and fastened to the flap by means of the two free longitudinal edges.
  • the width of the seal is then about 25 mm.
  • the folded fleece protrudes over the circumference of the flap. In the closed position, the non-woven seal is applied to the inside of the housing seal and seals in this way from the housing with respect to sliding.
  • the pivot axis may be centered relative to the flap and the butterfly valve may have two offset in the flow direction by the thickness of the flap staggered and arranged on opposite housing walls of the housing stops, the one stop in the flow direction before and the other stop in the flow direction seen behind the pivot axis is arranged.
  • the flap may have two flap surfaces and a circumferential end face substantially perpendicular to the flap surfaces connecting the two flap surfaces.
  • the flap surfaces are preferably arranged parallel to each other and congruent in such an embodiment. It is advisable if in the end face a groove extending around the pivot axis except for the two interruptions is provided, which partially receives the outwardly projecting seal.
  • the flap may consist of two almost identical, preferably two identical, trained flap elements which are interconnected via an intermediate layer.
  • the flap members and the intermediate layer can be made of the same material, such as calcium silicate, or of different materials.
  • the intermediate layer may have smaller outer dimensions than the two flap elements, whereby a groove for receiving the outwardly projecting seal is formed in the edge region between the flap elements.
  • the intermediate layer may be formed as a closed frame, so that in the assembled state in the space enclosed by the two flap elements and the frame a cavity, in particular filled with mineral wool or mineral fleece, cavity is formed.
  • the cavity may be filled with an insulating material, such as mineral wool or mineral fleece. But it is also possible that the cavity is unfilled, i. hollow, is.
  • the frame can also be multi-part, for example, be divided into two parts. A two-part arrangement lends itself, for example, to receiving a shaft. In this case, the two frame parts are coordinated so that between the two frame parts a free space, which is the dimensions of the shaft remains.
  • a seal is provided between the flap and the housing wall. These slides in the manner of a sliding seal on the pivot axis and serves to additionally seal the area around the pivot axis.
  • the additional sealing in the region of the pivot axis can be, for example, the fleece already described above, which is designed, for example, as a high-temperature glass wool mat.
  • a high-temperature glass wool mat is made of silicate fibers and has a high temperature resistance and low thermal conductivity.
  • the butterfly valve may be designed as smoke control.
  • Smoke dampers serve to keep areas in a building, for example an escape area, smoke-free.
  • the area of application of a smoke extraction damper is at a temperature which is between the ambient temperature of the respective smoke-free area (cold smoke extraction) and a temperature of up to 1000 ° C or more (hot smoke extraction).
  • smoke control dampers must on the one hand ensure a cold seal and on the other hand a hot seal. Due to the possibly high temperatures usually consist of the housing, the flap, the stops and arranged on the outside of the housing motor encapsulation of the drive means of a calcium silicate.
  • Smoke dampers are usually triggered by a smoke detector. Of course, other tripping devices, such.
  • a remote triggering device As a manual triggering device, a remote triggering device or the like, conceivable.
  • the energy to open and close must be permanently applied to the flap.
  • Smoke dampers are designed so that even after the release, ie after pivoting from the open position to the closed position, a subsequent opening, ie pivoting into the open position, guaranteed is. Of course, this also applies to the reverse case.
  • the butterfly valve can also be designed as a fire damper.
  • Fire damper usually have a metal housing in which a made of calcium silicate flap is pivotally mounted.
  • a fire damper for example, be manually operable.
  • the flap is fixed by means of a fixing device against a restoring force in its open position.
  • the flap is from the fixed position after triggering a triggering device, such as a fusible link, by the restoring force, which is provided by the spring from its open position to its closed position pivoted.
  • a triggering device such as a fusible link
  • the intumescent material ie the material which foams when it is hot, puffs up.
  • the intumescent material now completely fills a possibly existing gap between the stop and the flap located in the closed position, so that the gap between the stop and the flap is sealed.
  • the flap can now no longer be opened and must be replaced later.
  • a triggering devices other embodiments, such as an electric fusible link, conceivable.
  • butterfly valve can also be designed as a combined fire protection and smoke control.
  • a drive device acts directly or indirectly on the flap.
  • the flap can be moved by motor to the desired position.
  • the drive device is designed for example as a spring return motor.
  • a spring is tensioned in the spring return motor.
  • a thermoelectric triggering device which may be, for example, an electric soldering, causes a power interruption.
  • the spring return motor can no longer counteract the restoring force generated by the tensioned spring, so that the flap is closed by the restoring force applied by the spring.
  • a smoke control damper comprises a motor drive device
  • an applied voltage is required both for pivoting the flap from the open position to its closed position and for pivoting the flap from the closed position to its open position.
  • the flap can be provided on both sides of the flap ever a stub shaft.
  • the flap is not covered on its entire width by a wave.
  • the stub shafts may be fastened by means of screws relative to the flap, for example.
  • At least one stub shaft can have at least one longitudinal bore not penetrating the entire stub shaft. This reduces the weight on the one hand. On the other hand, the heat transfer is reduced because in the area concerned only a smaller cross-sectional area is available.
  • the non-combustible mineral fiber-containing, in particular formed as a mineral fiber foam, material may be completely encased by a non-combustible, in particular formed as a coated glass fabric, layer. Then, the non-combustible mineral fiber foam is a core that is coated on all sides by the layer.
  • the glass cloth jacket can consist of textile glass fibers or glass filaments with and without selenium.
  • a complete shroud is meant an embodiment in which mineral fiber-containing material is seen along its circumference, i. in the area of its four long sides, is enveloped by a non-combustible layer.
  • the layer can be wrapped around the mineral fiber-containing material and then the non-combustible layer can be fixed in the region of its two free longitudinal edges against each other. Then, only the end face of each of the two opposite ends of the mineral fiber-containing material is not covered with the non-combustible layer. In the state inserted into the groove, the two end faces of the mineral fiber-containing material touch.
  • the non-combustible layer may also be formed as a hose.
  • FIGS. 1 and 2 show a shut-off valve with a housing having a circumferential housing 1 housing 2.
  • the housing 2 has a quadrangular cross-section.
  • a, about a pivot axis 3, in the direction of arrow P pivotally mounted flap 4 is provided.
  • the pivot axis 3 is centered relative to the flap 4.
  • a respective stop 6 Seen in the flow direction 5 both in front of and behind the pivot axis 3, a respective stop 6 is provided on the inside of the housing 2.
  • the stops 6 are seen in the flow direction 5 by a little more than the thickness of the flap 4 offset from each other and arranged on opposite housing walls 1 of the housing 2.
  • Each stop 6 is approximately U-shaped and consists of a base portion 7, which is arranged parallel to the pivot axis 3. At each end of each base portion 7 each adjoins a side portion 8. The length of each side portion 8 is adjusted so that in the open position, the flap 4 is aligned parallel to the flow direction 5 and in this position, the flap 4 touches all four ends of the side portions 8.
  • each stop 6 on the side facing the closing position of the flap 4 has a recess 9 which, in the illustrated embodiment, has a quadrangular cross-section.
  • Each recess 9 is formed by a projecting edge region 10 and by the housing wall 1.
  • the layer 12 is made of a material having a melting point of more than 1000 ° C, preferably more than 1400 ° C has. It may be, for example, a nonwoven made of alkaline earth silicate wool. This is a high temperature glass wool.
  • the layer 12 may, for example, be adhered to the intumating material 11. It is also quite possible, which is a mass that forms the hardened, preferably light, intumescent material 11, for example, formed on the non-woven layer 12 is poured. Then, the layer 12 and the intumescent material 11 are firmly and permanently connected to each other.
  • a seal 13 which protrudes parallel to the flow direction 5 and protrudes from the layer 12, is provided.
  • This seal 13 is formed as a hollow profile - in the illustrated embodiment, as a hose-like formed hollow profile (lip seal) -.
  • a groove 14 is provided in the stop 6, which partially receives the protruding seal 13.
  • Fig. 14 a shows the formed as a hollow profile protruding seal 13.
  • the original state is round in the illustrated embodiment.
  • the above seal 13 may comprise a coated glass cloth jacket on the inside of which a non-combustible mineral fiber foam is disposed.
  • Fig. 14b the configuration of the protruding seal 13 is shown in the introduced state in the groove 14.
  • the protruding seal 13 has, in a partial region, an adhesive strip 25 arranged on the outside.
  • the groove 14 is located in that in the closed position of the flap 4 facing region of the stop 6 on the side of the intumescent material 11, which is further spaced from the housing wall 1.
  • the groove 14 is formed by the intumescent material 11 and by the projecting edge portion 10.
  • the recess 9 of each stop 6 extends continuously over both side cuts 8 and over the base portion 7 of a stop. 6
  • the flap 4 consists of two identically designed flap elements 15 which are interconnected via an intermediate layer 16.
  • the flap 4 has two parallel flap surfaces K and a substantially perpendicular to the flap surfaces K, the two flap surfaces K connecting circumferential face S.
  • the intermediate layer 16 in the embodiment of the FIGS. 1 to 3 smaller outer dimensions than the two flap elements 15, whereby in the edge region between the flap elements 15, a groove 17 for receiving an outwardly projecting seal 18 is formed.
  • the outwardly projecting seal 18 is formed circumferentially except in the region of the pivot axis 3.
  • the above seal 18 consists, for example, of a folded nonwoven, wherein the two longitudinal edges of the nonwoven are fastened in the groove 17.
  • FIG. 2 the position of the flap 4 is shown in its closed position.
  • the hose-like seal 13 is compressed by the concerns of the flap 4.
  • the Flap 4 is not in direct contact with the stops 6 in this embodiment.
  • the hose-like seal 13 causes a nearly airtight seal in the flow direction 5 seen between the flap 4 and the stops 6, since it is elastic and can be compressed insofar as concerns the flap 4. Due to the very high melting point, the tube-like seal 13 effects a seal both in the cold state and in the hot state. If the temperature of the flowing medium exceeds the foaming temperature of the intumescent material 11, foaming of the intumescent material 11 occurs.
  • FIG. 3 the edge region of the flap 4 described above is again shown on an enlarged scale.
  • FIG. 4 an alternative embodiment is shown which has no outwardly projecting seal 18.
  • the intermediate layer 16 extends to the outer region of the flap elements 15th
  • FIGS. 5 to 8 a first embodiment of a flap 4 without an outwardly projecting seal 18 is shown.
  • a stub shaft 19 is provided on both sides of the flap 4.
  • Each of the two stub shafts 19 has a longitudinal bore 20 in its end protruding from the flap 4.
  • quadrangular end are each provided two through holes 21, so that by means of screws 22, the stub shaft 19 relative to the flap elements 15 can be fixed.
  • the intermediate layer 16 which may be formed, for example, as a frame, a plurality of parts, in the illustrated embodiment in two parts, formed.
  • the two halves of the intermediate layer 16 are matched with respect to the dimensions of the flap elements 15 so that between the two halves of the intermediate layer 16 a space for performing the stub shaft 19 remains.
  • the housing walls 1 are constructed in the illustrated embodiments of two contacting calcium silicate plates.
  • left housing wall is provided only in the inner calcium silicate plate of the housing 1 a hole.
  • a through hole is provided, so that protrudes on this side of the stub shaft 19 on the outside.
  • the protruding end is formed as a square, so that a rotationally fixed connection with a drive, not shown, is possible.
  • a bearing bush 23 is provided in each bore.
  • FIGS. 9 to 12 is an alternative embodiment, which in turn has no outwardly projecting seal 18, as far as shown, in that here the longitudinal bore 20 in each stub shaft 19 is not in the end which protrudes from the flap 4, but is located in the end, which is arranged in the flap 4.
  • FIG. 13 a third embodiment of stub shafts 19 is shown.
  • the located in the flap 4 end of each shaft stub 19 slotted for receiving a sheet 24 is formed.
  • two holes 21 are provided, are performed by the screws, not shown, for mounting the flap 4.
  • FIG. 15 an alternative embodiment of a butterfly valve according to the invention is shown.
  • a non-flammable mineral fiber-containing material 11a is provided which almost completely fills the recess 9 and which is not burnable either in the region facing the flap 4 in the closed position or in the other three lateral regions
  • Layer 12a is covered.
  • the layer 12a may be a coated glass fabric.
  • the non-combustible mineral fiber-containing material 11a is completely seen along its circumference, ie in the region of its four longitudinal sides, enveloped by the layer 12a.
  • the layer 12a can be placed around the material 11a and the layer 12a fixed in the region of its two free longitudinal edges against each other. Then only the end faces are not covered with the layer 12a. In the state inserted into the groove 9, the two end surfaces touch.
  • the layer 12a may also be formed as a tube.
  • Fig. 16 and 17 a third embodiment of a butterfly valve according to the invention is shown.
  • the embodiment of the Fig. 16 and 17 differs from the embodiment according to Fig. 15 in that no protruding seal 13 is provided.
  • the non-flammable mineral fiber-containing material 11a enveloped with the incombustible layer 12a faces the protruding edge portion 10 as viewed in the flow direction 5, so that the flap 4 is in its closed position in contact with the non-flammable layer 12a and sealing is achieved ,
  • the non-combustible mineral fiber-containing material 11a is compressed a little in the closed position of the flap 4 and at the same time a little squeezed in the middle of the butterfly valve, so that a high density is achieved in this way.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Gasket Seals (AREA)
EP20130158622 2013-03-11 2013-03-11 Clapet de fermeture destiné à être utilisé dans une conduite d'une installation de ventilation ou d'une installation de désenfumage mécanique Withdrawn EP2778554A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20130158622 EP2778554A1 (fr) 2013-03-11 2013-03-11 Clapet de fermeture destiné à être utilisé dans une conduite d'une installation de ventilation ou d'une installation de désenfumage mécanique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20130158622 EP2778554A1 (fr) 2013-03-11 2013-03-11 Clapet de fermeture destiné à être utilisé dans une conduite d'une installation de ventilation ou d'une installation de désenfumage mécanique

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EP2778554A1 true EP2778554A1 (fr) 2014-09-17

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EP20130158622 Withdrawn EP2778554A1 (fr) 2013-03-11 2013-03-11 Clapet de fermeture destiné à être utilisé dans une conduite d'une installation de ventilation ou d'une installation de désenfumage mécanique

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3366356A1 (fr) * 2017-02-23 2018-08-29 Trox GmbH Clapet, en particulier clapet coupe-feu
US20210346834A1 (en) * 2020-05-06 2021-11-11 SMARTKOREA Co., Ltd. Toxic gas purification apparatus having a local exhaust function
EP4015050A1 (fr) * 2020-12-21 2022-06-22 Aldes Aeraulique Dispositif coupe-feu

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9103382U1 (fr) * 1991-03-19 1991-06-20 Zimmermann, Karl, 5000 Koeln, De
DE19849863A1 (de) * 1997-10-30 1999-05-06 Strulik Sa Feuerschutzklappe für einen Lüftungskanal
EP1960060A1 (fr) * 2005-12-13 2008-08-27 Fläkt Woods AB Obturateur coupe-feu
EP2450642A1 (fr) * 2010-11-09 2012-05-09 Rf-Technologies nv Volet de désenfumage à portillon

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9103382U1 (fr) * 1991-03-19 1991-06-20 Zimmermann, Karl, 5000 Koeln, De
DE19849863A1 (de) * 1997-10-30 1999-05-06 Strulik Sa Feuerschutzklappe für einen Lüftungskanal
EP1960060A1 (fr) * 2005-12-13 2008-08-27 Fläkt Woods AB Obturateur coupe-feu
EP2450642A1 (fr) * 2010-11-09 2012-05-09 Rf-Technologies nv Volet de désenfumage à portillon

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3366356A1 (fr) * 2017-02-23 2018-08-29 Trox GmbH Clapet, en particulier clapet coupe-feu
US20210346834A1 (en) * 2020-05-06 2021-11-11 SMARTKOREA Co., Ltd. Toxic gas purification apparatus having a local exhaust function
EP4015050A1 (fr) * 2020-12-21 2022-06-22 Aldes Aeraulique Dispositif coupe-feu
FR3117879A1 (fr) * 2020-12-21 2022-06-24 Aldes Aeraulique Dispositif coupe-feu

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