Abstract: A tube separator (1) having a shut-off means for separating an inlet side (2) from an outlet side (3) is provided. In order to prevent flutter of the shut-off means (4) in a pressure region changing over the shut-off means, a control valve (10) controlling the shut-off means (4) is provided. The control valve (10) is designed such that the pressure required for changing over from a first opened position to a second shut-off position is smaller than the pressure for changing over from the second into the first position.

Abstract: A tube separator (1) having a housing (2) with an inlet (5), an outlet (6) and a separating chamber (14) connectable with a drain (9) is provided. A shut-off member (10) connecting the inlet (5) with the outlet (6) in a first position thereof and separating the inlet (5) from the outlet (6) and connecting the outlet (6) with the separating chamber (14) in a second position is provided between the inlet (5) and the outlet (6). In order to prevent the entry of contaminations into the separating chamber (14) and hence into a line system connectable with the inlet (5) and the outlet (6) the separating chamber (14) is designed in a manner to be tightly sealed against contaminations. To this end preferably a filter (24) is provided between the separating chamber (14) and the drain (9).

Abstract: A tube separator (1) is provided comprising a housing (2) with inlet connection (13) and outlet connection (14) and a member (37) being disposed within the housing (2) and slidable between a first and a second end position. The member (37) comprises a channel (49) extending from an entrance opening (55) to an exit opening (56) and an area (40') on which the pressure in the inlet connection may act upon. Furthermore, a spring (46) acts upon the member (37) in a direction opposite to the action of the inlet pressure. The channel (49) forms a connection between the inlet connection (13) and the outlet connection (14) in the first end position of the member (37), and the member (37) separates the inlet connection (13) from the outlet connection (14) in the second end position of the member (37). The entrance opening (55) and the exit opening (56) each comprise a straight secant, and their respective secants being parallel to each other.

Abstract: A tube separator (1) is provided comprising a shut-off means (4) for separating an inlet side (2) from an outlet side (3) as well as a control valve (11) controlling the shut-off means (4) in dependence on the difference of the pressure at the inlet side 2 and the outlet side 3. In order to prevent a flutter of the shut-off means (4) for low flow rates a valve (42) is provided which is designed such that it releases the connection of the outlet pressure with the control valve (11) only if the flow rate of the medium drops below a certain value.

Abstract: A dirt and bacteria tight connection between a container for chemicals and the suction pipe of a metering pump is disclosed, which may in particular be used for the treatment of drinking water. In this way it is achieved that only degerminated air may enter the interior of the container when sucking metering fluid from the container.

Abstract: A dosing pump (1) is created allowing to accurately dose a medium to be dosed as a function of time or of a flow rate. The dosing pump (1) utilizes a predelivery obtained by a diaphragm (11) as well as a piston-cylinder-pump for dosing. The pump cylinder is connected with the suction conduit so as to prevent any pressure drop when the piston emerges from the cylinder. A crystallization or polymerization of the dosing agent in the piston-cylinder-means is thereby prevented.

Abstract: A dosing pump (1) is produced, with which a precise dosing is possible as a function of the time or of a flow rate. The dosing pump (1) operates with a preliminary transport obtained by means of a diaphragm (11). The stroke volume of the diaphragm (11) is greater than the volume of the pipe element present between a preliminary transport chamber (9) and a dosed medium tank (16). It is thereby made possible to omit a return pipe and a suction valve and a pressure valve.

Abstract: A dosing appliance with a suction tube introduceable into a dosing-medium vessel is provided, and by way of this dosing-medium vessels of different shapes can be used. For this purpose, the dosing appliance has a supporting device which carries the dosing-medium vessel and is displaceable for the purpose of exchanging the dosing-medium vessel.

Abstract: A testing appliance (10) is provided for a metering apparatus (1), the latter being used, in particular, for the aftertreatment of water. The testing appliance is designed in a manner such that it can be connected both to the electrical portion and to the metering line of the metering apparatus and simulates the functions of the metering apparatus in a manner such that it is possible to check every one of these functions.