Patent ID: 8359749

Claim:
A method for manufacturing at least a first pressure control device and a second pressure control device, wherein the first pressure control device comprises a first reference pressure chamber and the second pressure control device comprises a second reference pressure chamber, the method comprising: manufacturing first and second casings such that the first and the second casings are substantially identical to each other and that each casing has a closed end and an open end; manufacturing first and second plunger parts such that the first plunger part and the second plunger part have an equal outer contour which is provided with at least one recess, wherein the dimension of the recess of the first plunger part is different from the dimension of the recess of the second plunger part and/or wherein the position where the recess of the first plunger part is situated is different from the position where the recess of the second plunger part is situated, assembling the first plunger part and the first casing to form the first reference pressure chamber in a gas having a first ambient pressure, wherein the first reference pressure chamber encloses the gas under a first reference pressure, and the first reference pressure is achieved in a first position of the first plunger part relative to the first casing, and assembling the second plunger part and the second casing to form the second reference pressure chamber in the gas having a second ambient pressure equal to the first ambient pressure, wherein the second reference pressure chamber encloses the gas under a second reference pressure different from the first reference pressure, and the second reference pressure is achieved in a second position of the second plunger relative to the second casing, wherein the respective pressure control device is configured to feed, on the basis of the first or the second reference pressure, a gas or fluid from a first space to a second space having a pressure lower than that of the first space, and each of the first and second positions corresponds to a predetermined closing position defined in the respective pressure control device such that a passage between the first and the second space is closed by the respective plunger part, whereas the passage is cleared upon a movement of the respective plunger part in a direction away from the closed end of the casing.