Extraction valve head for tanks
AssigneeMerck Patent Gesellschaft mit beschraenkter Haftung
InventorsFrank Joseph, Holger Jurgensen
Life of this patent
Estimating the term…
Abstract
An extraction valve head for a tank for high-purity and/or toxic liquid chemicals has an inlet valve for a filler gas, an outlet valve and a purging valve, which closes a bypass between a gas inlet line and an extraction line. The valves are configured as metal diaphragm valves and are fitted in a common metallic valve housing block. All valve seals of the valves are arranged in close spatial proximity to one another in the valve housing block.
Claims7
An extraction valve head for a tank (3) used for containing high-purity and/or toxic liquid chemicals, the valve head having an inlet valve for a filler gas, which joins a gas inlet line and a tank inlet, and an outlet valve, which joins a tank outlet to an extraction line, a bypass, which can be shut off by a purging valve, connecting the gas inlet line to the extraction line;
- wherein the inlet valve (1), the outlet valve (11) and the purging valve (12) are metal diaphragm valves and are fitted in a common metallic valve housing block;
- wherein a valve seat (10a) for the inlet valve (10) is arranged between the gas inlet line (4) and the tank inlet (5);
- wherein a valve seat (11a) for the outlet valve (11) is arranged between the tank outlet (7) and the extraction line (8);
- wherein a valve seat (12a) for the purging valve (12) is arranged between the gas inlet line (4) and the extraction line (8);
- and
- wherein all valve seats (10a, 11a, 12a) are arranged in close spatial proximity to one another in the valve housing block (9).
Dependencies are inferred from the claim text.