DE3017084A1 - Double seated fluid stop valve - has diaphragm shutting leakage chamber off from atmosphere before opening - Google Patents

Abstract

The fluid stop valve has two valve plates rigidly fixed to a spindle, forming two seals with a leakage chamber between , connected to atmosphere in the shut position. Before the valve is opened by lifting the two plates (1,2) off their seats, the connection to atmosphere is shut off by a diaphragm (5). Alternatively, this can be done by a third movable plate between the other two. The design avoids any risk of product leakage to atmosphere during operation of the valve.

Description

SUBMITTED I

GEA AHLBORN GmbH & Co, KG 3203 Sarstedt
Voss Street 11-13

Valve for shutting off liquid flows

The invention relates to a valve for shutting off liquid flows with two on one Axis rigidly attached valve plates to create two seals with a safety leakage space in between, which has a connection to the atmosphere when the valve is closed

Double sealing valves have in closed

State a connection between the outside atmosphere and the outside of the seals of both valve disks. The known constructions provide that only one when initiating the opening process the two valve disc lifts off and after a short distance of a few Millimeters comes into contact with the second valve disk and then moves it into the open position.

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FOLLOW-UP I

The transition phase between the lifting of the first valve disk and its contact with the second include that © ine the two sides of the valve, in which the product can stand, gets a direct connection with the outside atmosphere. This short-term ι direct connection leads to product losses. .

The object of the invention is, these known ^valves: to improve that product losses are excluded with certainty. . '■

According to the invention, this object is achieved in that before the two valve disks are lifted from their seals and thus opening the valve, the connection to the atmosphere is closed by a membrane.

In a further embodiment of the invention, before taking off of the two seals and thus the valve open the connection to the outside through a third, movable between the two fixed valve disks arranged third valve disk closed.

Two exemplary embodiments of the valve according to the invention are illustrated in somewhat more detail below with reference to the drawing. In this show in a purely schematic way:

Fig. 1 is a vertical toilet section through a first Embodiment of the valve according to the invention in the closed position,

FIG. 2 shows a partial representation of the arrangement according to FIG. 1, j where the valve is indicated in the open position: is, ;

3 shows a vertical partial section through a second

Embodiment of the double seat valve according to the invention 3 in the closed position,

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FIG. 4 shows a partial representation of the arrangement according to FIG. 3> with the valve shown in the open position is.

Fig. 1 of the drawing shows a partial representation of a first embodiment of the valve for shutting off a flowing medium, e.g. B. a liquid · The inflow or outflow side of the medium is indicated with corresponding arrows.

With 1, 2, the two valve plates are designated. Of the Valve plate 2 ends in a hollow cylindrical part.

Each valve disk 1, 2 is located in the position shown in FIG. 1 the drawing shown closed position against an associated Valve seat on *

With a membrane 5 is referred to, which before lifting of the two valve disks 1, 2 from their seals 3 »4 and thus opening the valve, the connection to the atmosphere closes.

Fig. 2 of the drawing shows the valve in the open State.

In the embodiment according to FIGS. 3 and 4, before lifting the two seals 3, 4 and thus opening the valve, the connection to the outside through a third, between the two fixed valve plates arranged valve plate 6 closed.

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Claims (2)

NAQHQSRBCHrf PATENT CLAIMS / 1.) Valve for shutting off liquid flows with two open ^ - ^ an axis rigidly attached valve plates to generate. two seals with a safety leakage space in between, which has a connection to the atmosphere when the valve is closed, characterized in that that before lifting the two valve disks (1, 2) from their seals (3, 4) and thus opening the: Valve, the connection to the atmosphere is closed by a membrane (5). 2. Valve according to claim 1, characterized in that before lifting the two seals (3 »4) and so that the valve opens the connection to the outside through a third movable between the two fixed valve plates (1, 2) arranged third valve disk (6) is closed. COPY, h 130045/0 441