Fluid handling – With cleaner – lubrication added to fluid or liquid sealing... – Cleaning or steam sterilizing
Patent
1994-06-28
1998-09-15
Walton, George L.
Fluid handling
With cleaner, lubrication added to fluid or liquid sealing...
Cleaning or steam sterilizing
134166C, 137312, 13761418, F16K 1120, B08B 906
Patent
active
058065547
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a double seat valve with two serially mounted closure elements movable relative to each other, as described in the preamble of claim 1.
The many years of additional development of the double seat valve indicated in the foregoing have resulted in a number of features, some of which are indispensable and some of which are desirable. These features are described concisely below, without their being assigned to either category: leakages from the leakage cavity into the environment of the double seat valve (hereafter designated concisely as "drainage"); during joint disassembly of the drive and the interior valve elements); direction of action relative to the associated seat surface (in what follows the sealing means are designated as "radial sealing means" with reference to radially sealing closure elements, in contrast to axially sealing closure elements, so-called seat plates, with "axial sealing means," in the case of which these means preferably act in the axial direction); closure elements for the purpose of seat cleaning; leakage cavity, with a cross-section corresponding to the rated width of the largest pipe connected to the valve, is to be drainably connectable to the atmosphere. valve referred to initially represents one typical structure and is described, for example, in U.S. Pat. No. 4,436,106 A (FIGS. 1 and 2). The other basic structure is described for the first time in DE 25 32 838 A1. Neither of these two valves nor other comparable double seat valves having these structures have thus far been capable of embodying all the features enumerated.
The double seat valve known from U.S. Pat. No. 4,436,106 A (FIGS. 1 and 2), with its axially sealing closure elements, can be applied in the installed position illustrated in the referenced document, for example, if the space available below the lower valve housing element is limited. In essence it may be installed in any desired installation position, for example, even rotated through an angle of 180 degrees, that is, with valve rods oriented vertically downward or in a horizontal or oblique mounting. With the valve rods oriented vertically, the leakage fluid can drain independently under the influence of gravity (by way of the annular gap between the valve rod and the hollow rod; FIG. 2), or again the leakage fluid and, if applicable, the cleaning means deliverable from the vicinity of the valve over another connection, may drain without problem (see FIG. 1 for an illustration of the hollow valve rod).
The seating surfaces are additionally susceptible of seat cleaning to the extent that the possibility is provided of a partial lifting movement. In this instance the cleaning means flowing by way of the uncovered seat surfaces into the leakage cavity as a rule drains into the environment of the double seat valve by way of the annular gap between the hollow rod and the valve rod. The second path of connection to the leakage cavity inside the valve rod then communicates with a cleaning line taken to the double seat valve from the outside, so that, as explained above, cleaning of the leakage cavity is possible in both the closed and the open position.
The state-of-the-art double seat valve is characterized essentially by drainage of the leakage cavity, with the valve seat fastened to the housing, and opening movement and extensibility in the direction of drive. The drainage process does not meet the 3A requirement, in that this requirement states specifically that the connection path between the leakage cavity and the vicinity of the double seat valve is to be developed with the rated drainage cross-section of the latter. The rated drainage cross-section of the double seat valve is here defined as the cross-section of the largest possible pipe that can be attached to the housing connections of the valve.
There are additionally areas of application in the sphere of process technology, that of asepsis among others, in which a simple separation of product area (interior of the valve housing) and the environment of the double seat valve b
REFERENCES:
patent: 4304251 (1981-12-01), Schadel et al.
patent: 4368753 (1983-01-01), Brakelmann et al.
patent: 4373545 (1983-02-01), Knappe
patent: 4436106 (1984-03-01), Tuchenhagen
patent: 4460014 (1984-07-01), Mases et al.
patent: 4522223 (1985-06-01), Balsys et al.
patent: 4552167 (1985-11-01), Brakelmann
patent: 4605035 (1986-08-01), Rasmussen et al.
patent: 4617955 (1986-10-01), Melgaard
patent: 4655253 (1987-04-01), Ourensma
patent: 4687015 (1987-08-01), Mieth
patent: 4856551 (1989-08-01), Brakelmann
patent: 5085241 (1992-02-01), Mieth
patent: 5575305 (1996-11-01), Mieth
Fuchslocher/Schulz: "Die Pumpen", 12th Edition, 1967, pp. 325, 326.
Pohlenz, W.: "Pumpen fur Flussigkeiten", 4th Edition, 1984, pp. 126, 128.
Otto Tuchenhagen GmbH & Co. KG
Walton George L.
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