EP0129570A1 - Separateur de tuyau - Google Patents

Separateur de tuyau

Info

Publication number
EP0129570A1
EP0129570A1 EP84900050A EP84900050A EP0129570A1 EP 0129570 A1 EP0129570 A1 EP 0129570A1 EP 84900050 A EP84900050 A EP 84900050A EP 84900050 A EP84900050 A EP 84900050A EP 0129570 A1 EP0129570 A1 EP 0129570A1
Authority
EP
European Patent Office
Prior art keywords
inlet
connection
channel
outlet
pipe separator
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Withdrawn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
EP84900050A
Other languages
German (de)
English (en)
Inventor
Hans Arens
Hans Kern
Richard Haslberger
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.)
Gruenbeck Wasseraufbereitung GmbH
Original Assignee
Gruenbeck Wasseraufbereitung 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 Gruenbeck Wasseraufbereitung GmbH filed Critical Gruenbeck Wasseraufbereitung GmbH
Publication of EP0129570A1 publication Critical patent/EP0129570A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7769—Single acting fluid servo
    • Y10T137/777—Spring biased
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated
    • Y10T137/8663—Fluid motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/86702—With internal flow passage

Definitions

  • the invention relates to a pipe separator with a housing with inlet connection and outlet connection and with an element arranged in the housing a and displaceable between a first and a second end position, which element has a channel extending from an inlet opening to an outlet opening through the element has a surface impactable by the pressure in the inlet connection and on which a spring acts against the action of the inlet pressure, the channel in the first end position forming a connection between the inlet and outlet connections and the element in the second end position separating the inlet connection from the outlet connection , wherein the inlet opening and outlet opening each have a straight section line which are parallel to one another.
  • Such a pipe separator is known from DE-AS 27 59 174.
  • the fluid flows longitudinally through the element in the first position, in which it forms a connection between the inlet connection and the outlet connection.
  • the movement into the second position, in which the inlet connection is separated from the outlet connection, takes place by longitudinally displacing the element.
  • Element engages a different number of seals between the displaceable element and the housing, which can lead to the element becoming stuck in an intermediate position due to the changing frictional conditions due to the displacement path.
  • the air entry into the line system should be kept as small as possible.
  • a safe function of the pipe separator should be ensured without the pipe separator getting stuck.
  • a pipe separator of the type described in the introduction which according to the invention is characterized in that the channel extends transversely through the element and the displacement of the element in a direction transverse to the axis of the channel and the axis of inlet connection and outlet connection.
  • the element is preferably designed as a flat slide, the seal between the housing and the element or the channel in the element preferably being made by ceramic flat seals.
  • the inlet and outlet openings in the displacement direction can have a smaller extent than, for example, transversely thereto.
  • a control valve can be provided which, in a first position, applies the fluid pressure in the inlet connection to the surface of the element which is preferably designed as a flange or piston, and then
  • FIG. 1 shows a section through a first embodiment of the invention in the flow position.
  • Fig. 3 shows a section through a second embodiment of the invention in the flow position.
  • the pipe separator 1 shown in FIG. 1 has a housing 2, essentially designed as a hollow cylinder, which on the upper end face 3 via a cover 4 and on the lower end face 5 via a cover 6 with the interposition of seals 7 and 8, respectively is tightly closed.
  • the housing has diagonally opposite one another in the central region between the end faces 3, 5 with respect to the housing longitudinal axes 9.
  • lowing recording areas 10, 11 in the form of cylindrical sleeves which have a common axis 12 which intersects the housing axis 9 at a right angle.
  • an inlet connection 13 or an outlet connection 14 in the form of connecting pieces are inserted firmly and tightly.
  • Inserts 17, 18, which are designed to accommodate seals, are inserted into the inlet connection 13 and the outlet connection 14 from the inside of the housing.
  • connection between the inlet connection 13 and the insert 17 is designed such that a displacement of the insert 17 in the direction of the outlet, but not towards the inlet side, is possible.
  • connection between the drain connection 14 and the insert 18 is designed in such a way that a shift to the inlet side but not to the outlet side is possible.
  • the inlet connection 13 and the outlet connection 14 each have hollow cylindrical regions 15, 16 which are coaxial to the axis 12.
  • the inserts 17, 18 have respective outer cylindrical guide sections 19, 20, the outer diameter of which is selected such that they can slide in the respective cylindrical section 15, 16. Seals 19 ', 20' are provided between the cylinder walls.
  • the guide parts 19, 20 On its end face facing the inside of the housing, the guide parts 19, 20 have radially outwardly projecting edges 21, 22 which abut the respective end faces of the cylindrical regions 15, 16. Furthermore, the inserts 17, 18 have on their ends facing the inside of the housing a socket for receiving seals 27, 28 in the form of cylinder bottoms 23, 24.
  • the cylinder bottoms 23, 24 have recesses 25, 26 on the side facing one another, into which the seals, which according to the invention are made of ceramic disks 27, 28, are formed, are used so that their opposing surfaces 29, 30 are arranged parallel to one another at a distance.
  • An inlet opening 31 and an outlet opening 32 extend through the cylinder bottoms 23, 24 and the ceramic disks 27, 28 and are formed coaxially to one another. In this way it is achieved that the seals 27, 28 are displaceable towards the interior of the housing, but not towards the inlet or outlet.
  • the housing 2 further has a first cylindrical region 35 between the receiving regions 10, 11 and the upper end face 3 and a second cylindrical region 36 between the receiving regions 10, 11 and the lower end face 5.
  • An element 37 serving as a locking slide is provided in the housing 2 and is arranged to be displaceable along the axis 9.
  • the element 37 essentially consists of a piston rod 38, a piston 40 which is arranged at the first end 39 of the piston rod 38 and is connected to the latter, and an abutment 42 which is arranged at the second end 41 of the piston rod 38 and is connected to the latter
  • Benstange 38 is designed as a hollow tube through which a first channel 47 extends in the longitudinal direction from the upper first end to the lower second end, which has a cylindrical shape in a channel region 48 adjoining the upper end 39.
  • the longitudinal axis of the piston rod 38 coincides with the housing axis 9.
  • a bore extends in the form of a second channel 49 across the piston rod and extends from the first channel 47 the wall 50 is separated.
  • the piston rod 38 has such a length and is arranged such that the first end 39 is located within the first area 35 and the second end 41 is located within the second area 36 of the housing 2.
  • the piston 40 is sealed via guide elements 43 and seals 44 within the first region 35 between an upper first end position, in which the piston 40 rests on the cover 4, and a lower second end position, in which piston 40 on the sleeve-shaped receiving regions 10 , 11 lies on, slidably mounted.
  • the abutment 42 is designed as an abutment for a spring 46 acting on the cover 6. It is slidably supported in the second area 36 via lateral guide elements 45. Ventilation openings are provided in the abutment 42 for connecting the regions of the second region 36 which are separated by the abutment.
  • the position of the second channel 49 is determined such that this second channel 49 is in alignment with the inlet opening 31 and the outlet opening 32 when the element 37 is in its lower first end position.
  • the sockets encompass the ceramic disks in such a way that they can be moved in ribs. device of the displacement of the element 37 is prevented.
  • the ceramic disks 53, 54 each have the cross-sectional shape of the channel 49 and are in alignment therewith with holes 55, 56.
  • the holes 55, 56 form the inlet opening or the outlet opening of the channel 49 on the outer surfaces 59, 60 of the ceramic disks 53, 54.
  • the surfaces 59, 60 lie parallel to one another and their distance is at most as great as that Distance between the two ceramic disks 27, 28 when the edges 21, 22 of the inserts 17, 18 abut the inlet connection 13 and outlet connection 14.
  • the ceramic disks 27 and 53 or 28 and 54 each form a cooperating pair of flat seals.
  • the ceramic disk 54 has a further hole 62 which has the same shape as the holes 56.
  • the holes 56 and 62 are offset from one another by a distance which is equal to the displacement path of the element 37 from the first to the second end position.
  • the piston rod 38 On the side facing the ceramic disk 54, the piston rod 38 has a hole 64 in the same position as the hole 62.
  • the inlet side can be connected to the cylinder space 75 via a branch line 79 and a valve 61.
  • the cover 4 has a cylindrical extension 65, which extends coaxially to the axis 9, the diameter of which is slightly smaller than the inside diameter of the channel area 48 and which carries an annular seal 66 at its lower end.
  • the length The approach 65 is selected so that it projects into the channel region 48 in each position of the element 37 and closes the first channel 47 on its upper side in a sealing manner by means of the ring seal 66.
  • a channel 67 extends in the longitudinal direction through the extension 65 and the cover 4 with a central region 68 and two end regions 69, 70, which have a larger diameter than the central region 68.
  • valve seat 71 The transition from the central region 68 to the lower end region 70 forms a valve seat 71, a further valve seat 72 is formed by the end face on the outer side of the cover 4 adjoining the upper end region 69.
  • the diameter of the valve seat 72 is larger than that of the valve seat 71.
  • radial bores 73, 74 are provided in the shoulder 65, which bores from the cover 4, shoulder 65, piston 40 and connect the first region 35 enclosed cylinder space 75 to the central region 68 of the channel 67.
  • a device for setting the switchover point of the valve 61 is provided on the cover 4.
  • an annular shoulder 76 is provided, the free end face of which is closed by a membrane 77.
  • the membrane 77, the extension 76 and the cover 4 form a space 78 which is connected to the inlet connection 13 through the control or branch line 79 opening laterally into the space 78.
  • a plate 80 is arranged which is supported by a compression spring 81 against a second plate 82.
  • the plate 82 is in engagement with an adjusting spindle 83 which is locked by means of a rotary knob 84.
  • rUKt .. is rotatable.
  • the adjusting spindle 83 is supported against an upper housing part 85, on which a scale 85 ′ can be attached, by means of which the position of the rotary knob 84 and thus the prestress of the spring 81 can be read.
  • a valve rod 86 is attached to the membrane 77 on the side facing the space 78 and extends into the channel 67 in the direction thereof.
  • the valve rod 86 carries at its free end a first valve body 87 and between this and the membrane 77 a second valve body 88.
  • the first valve body 87 interacts with the valve seat 71, the second valve body 88 with the valve seat 72.
  • the distance between the valve bodies 87 and 88 is slightly larger than the sum of the length of the central region 68 and the upper end region 69, so that in the position of the valve bodies 87, 88 shown in FIG. 1 there is a distance between the valve seat 72 and the valve body 88 .
  • the diameter of the valve rod 86 is smaller than the inner diameter of the central region 68, so that an annular gap 89 is formed between the valve rod 86 and the inner wall of the central region 68.
  • a check valve 90 is arranged in the outlet connection 14 and has a valve plate 91 and a guide rod 92 projecting perpendicularly therefrom.
  • the guide rod 92 is mounted in a socket connected to the drain connection 14 so as to be displaceable in the direction of the axis 12 and is prestressed by means of a compression spring 93 in the direction of a ring 34 designed as a valve seat on the outlet-side wall of the cylinder bottom 24.
  • the height of the ring 34 is as small as possible, preferably of the order of magnitude a few millimeters, so that the distance of the valve seat from the sealing surface 60 is as small as possible.
  • a drain opening 94 is provided in the lower cover 6 for the drip water connection.
  • the embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 1 only in that the check valve 90 is not provided and the ring 34 can therefore also be omitted. Furthermore, the recess 62 in the ceramic disk 54 and the recess 64 in the element 37 are also not provided. The remaining identical parts are provided with the same reference symbols.
  • Fig. 2 shows the same embodiment of the pipe separator as Fig. 1, but the element 37 is in the second end position, whereby the pipe separator is in the disconnected position.
  • the flow position shown in FIG. 1 is present as long as the pressure on the inlet e 97 or in the inlet connection 13 does not fall below a certain set value.
  • This pressure is communicated to the chamber 78 via the branch line 79 and acts on the diaphragm 77 and on the first surface 98 of the first valve body 87 through the gap between the valve body 88 and the valve seat 72 and the annular gap 89.
  • the one exerted on the spring 81 via the diaphragm 77 The net force is determined by the difference between the force exerted on the membrane surface 77 and the force exerted on the first surface 98. Is the spring 81 biased so that this net force is sufficient to hold the valve in its first position shown in FIG.
  • the pressure prevailing in the space 78 is passed through the gap between the second valve body 88 and the valve seat 72 and communicated to the cylinder space 75 via the annular gap 89 and the bores 73, 74.
  • the pressure in the cylinder space 75 is approximately the pressure on the inlet side 97 and the piston 40 or the surface 40 'of the piston 40 which can be acted upon and which has an expansion normal to the direction of displacement of the element 37 is pressurized , which corresponds approximately to the inlet pressure.
  • the piston 40 and thus the entire element 37 are pressed or held in the first end position shown in FIG.
  • the volume displaced by the piston 40 is also pushed out through the bores 73, 74, the channel 67 and the channel 47 to the outlet opening 94.
  • the upper marriage position is shown in Fig. 2.
  • the channel 49 is displaced relative to the inlet opening 31 and the outlet opening 32 to such an extent that there is no longer any connection between the inlet opening 31, the channel 49 and the outlet opening 32.
  • the seal during the movement of the element 37 and also in the second end position is carried out by the two pairs of ceramic flat seals 27, 53 and 28, 54. In the upper end position, as shown in FIG.
  • the recesses 62 are , 64 in alignment with the drain opening 32 and this is thus via the channel 47 in connection with the discharge opening 94, so that the pressure on the inlet side of the check valve 90 drops to the pressure in the drain opening 94 and therefore the check valve 90 by the spring 93 is pressed against the ring 34 and the outlet side opposite the channel 47 closes.
  • the membrane 77 is moved upward, the valve body 88 is lifted off the valve seat 72 and the valve body 87 is pressed against the valve seat 71.
  • a connection is thus again established between the inlet side 97 and the cylinder space 75 and the element 37 is pressed downward into its flow position by the pressure increase in the cylinder space 75.
  • Switching pressure required in the disconnected position with the same preload of the spring 81 is lower than that for switching from the Separation position in the flow position, the switching pressure required.
  • the switching hysteresis thus achieved prevents the pipe separator from switching immediately again or fluttering in the event of slight pressure fluctuations.
  • the desired changeover pressure can be adjusted by adjusting the preload of the spring 81 can be set by means of the rotary knob 84, the preload being readable on the scale 85 '.
  • the channel 49 When moving in the disconnected position, the channel 49 is shifted upward and the channel area lying between the check valve 90 and the sealing surface 60 is ventilated. Since the channel 49 only for the distance from the drinking water side and process water side, i.e. the distance between the sealing surface 59 and the sealing surface 60 must have the prescribed length, the amount of air introduced is small even in the case where the channel 49 is ventilated. Venting the
  • Channel 49 can also be avoided in that the ceramic disks 27, 28 are extended so far up that the channel 49 is delimited on its end faces by the ceramic disks 27, 28 even in the disconnected position.
  • the venting of the space between the sealing surface 60 and the check valve 90 is finally avoided in the device shown in FIG. 3 by the fact that this space is not brought into connection with the drain opening 94 but because of the missing recesses 62, 64 the element facing side is sealed in the separation position by the ceramic flat gasket 54.
  • the Ablau side 100 is shut off by the element 37 to the drain opening 94 itself, and a check valve is no longer required.
  • the mutually sealing ceramic disks 27, 53 and 28, 54 have the property that the force to be applied for mutual displacement is largely independent of the pressing force of the two disks against one another. It is only necessary to ensure that the distance between the respective pairs of disks is not a certain amount exceeds. This is achieved according to the invention in that the inserts 17, 18 carrying the outer disks 27, 28 are displaceable within the housing 2 or the inlet connection 13 or the outlet connection 14 in the direction of the respective sealing surfaces 59, 60 and away from them and one have the floor exposed to the inlet or outlet pressure.
  • the inlet opening 55 and the outlet opening 56 of the channel 49 lie in parallel planes.
  • the inlet opening 55 and the outlet opening 56 each have a straight cutting line which are parallel to one another, the displacement of the element 37 taking place in a direction parallel to the cutting lines.
  • These intersection lines are defined in such a way that they connect two points of the boundary line of the inlet or outlet opening.
  • two such cutting lines 95, 96 are shown in dash-dot lines in FIG. 1.
  • the condition mentioned is always fulfilled when the inlet opening and the Exit opening are located on the outer surfaces of cylinders, the axes of which are parallel and point in the direction of displacement of the element 37.
  • the cross section of the channel 49 and also the inlet opening 55 and the outlet opening 56 can each have a smaller extent in the direction of the cutting lines 95, 96 than in one of which different direction.
  • the cross section of the channel 49 and the inlet and outlet openings can have an oval shape, the smaller semi-axis pointing in the direction of the displacement of the element 37 or in the direction of the section line 95, 96.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sliding Valves (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Check Valves (AREA)

Abstract

Séparateur de tuyau (1) doté d'un boîtier (2) avec raccord d'arrivée (13) et raccord de décharge (14), ainsi qu'un élément (37) situé dans le boîtier (2) et mobile entre une première et une seconde position extrême. L'élément (37) possède un canal (49) allant d'un ouverture d'entrée (55) à une ouverture de sortie (56) et une surface (40') pouvant être percutée par la pression du raccord d'arrivée (13). Un ressort (46) agit en outre sur l'élément (37) en sens inverse de l'action de la pression d'arrivée. Dans la première position extrême de l'élément (37), le canal (49) forme une liaison entre le raccord d'arrivée (13) et le raccord de décharge (14); dans la seconde position extrême de l'élément (37), l'élément (37) sépare le raccord d'arrivée (13) du raccord de décharge (14). L'ouverture d'entrée (55) possède une ligne d'intersection droite qui est parallèle à celle de l'ouverture de sortie (56). On peut réduire le plus possible le volume ventilé par le déplacement de l'élément (37) en effectuant le déplacement de l'élément (37) suivant une direction parallèle aux lignes d'intersection (95, 96).
EP84900050A 1982-12-21 1983-12-15 Separateur de tuyau Withdrawn EP0129570A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3247323 1982-12-21
DE19823247323 DE3247323A1 (de) 1982-12-21 1982-12-21 Rohrtrenner

Publications (1)

Publication Number Publication Date
EP0129570A1 true EP0129570A1 (fr) 1985-01-02

Family

ID=6181297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84900050A Withdrawn EP0129570A1 (fr) 1982-12-21 1983-12-15 Separateur de tuyau

Country Status (7)

Country Link
US (1) US4595031A (fr)
EP (1) EP0129570A1 (fr)
AT (1) AT395259B (fr)
CH (1) CH665697A5 (fr)
DE (1) DE3247323A1 (fr)
IT (1) IT1170032B (fr)
WO (1) WO1984002546A1 (fr)

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
DE4108865A1 (de) * 1991-03-19 1992-09-24 Schubert & Salzer Gmbh & Co In Rohrtrenner
US5135032A (en) * 1991-08-14 1992-08-04 Foster Valve Corporation Slurry gate valve
MX365988B (es) * 2013-08-06 2019-05-30 Arturo Flores Leija Hugo Sistema de apertura y cierre para fluidos presurizados.
US9249888B2 (en) 2014-01-17 2016-02-02 Ge Oil & Gas Pressure Control Lp Non-welded hardface gate and seats
DE202023000983U1 (de) 2023-05-04 2023-08-04 Joachim Klein Sicherheitsvorrichtung zur einfachen Installierung zwischen einer Trinkwasserleitung und einer Nichttrinkwasserleitung, zuverlässigen hygienischen Trennung zwischen Trinkwasser und Nichttrinkwasser und nachhaltigen Hygienisierung
CN117515179B (zh) * 2024-01-05 2024-04-02 瑞星久宇燃气设备（成都）有限公司 一种异步杠杆结构调压器及参数获取方法

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Publication number Priority date Publication date Assignee Title
US2394487A (en) * 1942-10-05 1946-02-05 Lincoln Eng Co Valve
US2474772A (en) * 1943-11-24 1949-06-28 Electrol Inc Unloading valve
US2588284A (en) * 1946-07-09 1952-03-04 Herbert C Otis Fluid pressure differential responsive cutoff valve
US2705020A (en) * 1950-10-26 1955-03-29 Virgil L Frantz Fluid pressure actuated control valve
US3006599A (en) * 1959-07-20 1961-10-31 Acf Ind Inc Valve seat
US3324888A (en) * 1964-10-23 1967-06-13 Republic Mfg Company Three-way, two-position valve
US3614061A (en) * 1969-03-03 1971-10-19 Wheatley Co Charles Ceramic gate valve
US3871616A (en) * 1973-12-10 1975-03-18 Julian S Taylor Gate valve disc
DE2747941C2 (de) * 1977-10-26 1985-02-14 Lang Apparatebau GmbH, 8227 Siegsdorf Vorrichtung zum Schutz von Trinkwasserleitungen gegen rückfließendes Brauchwasser
DE2759174C3 (de) * 1977-12-31 1987-07-09 F.W. Oventrop Arn. Sohn Kg, 5787 Olsberg Rohrtrenner
FR2469630B1 (fr) * 1979-11-12 1986-02-14 Frisquet Anc Ets M Disconnecteur pour canalisation d'eau potable
US4340203A (en) * 1980-10-14 1982-07-20 Deltrol Corp. Three way slide valve with center return
US4458879A (en) * 1982-07-12 1984-07-10 General Signal Corporation Valve

Non-Patent Citations (1)

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Title
See references of WO8402546A1 *

Also Published As

Publication number Publication date
AT395259B (de) 1992-11-10
IT1170032B (it) 1987-06-03
WO1984002546A1 (fr) 1984-07-05
DE3247323C2 (fr) 1988-09-29
US4595031A (en) 1986-06-17
DE3247323A1 (de) 1984-07-05
ATA907383A (de) 1992-03-15
IT8324299A0 (it) 1983-12-21
CH665697A5 (de) 1988-05-31

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