functions u201c opening closing u201d and u201c pressure adjustment u201d can be localized inside the valve 5 thus the function u201c pressure adjustment u201d is locally allocated to a closing section 22 and the function u201c opening closing u201d to a closing section 23 whereby the function u201c opening closing u201d and essentially the function u201c pressure adjustment u201d is separately implemented therewith the meaning of the expression u201c essentially u201d points to the fact that a certain overlapping is present in that region in which it comes to a quasi elongation of the effective length this is indicated by a dashed lined elongation of the pressure adjustment section 22 in relation to the overall length of the pressure adjustment section 22 the overlapping is small the overlapping range amounts to a maximum of 20 of the pressure adjustment section 22 for example in particular a maximum of 10 of pressure adjustment section 22 based on the preceding rather general remarks a big diversity of embodiments of the outer shape of the pintle 20 and or the inner shape of the sleeve 21 can be obtained the embodiments are examples which are shown in fig3 and 4 while the gap width s 1 in the embodiment according to fig3 is rather constant in the pressure adjustment section 22 the gap width s 1 varies in the embodiments according to fig2 and 4 the variation in the gap width s 1 being generated in one case by the outer shape of the pintle 20 like in fig2 and in the other case by the inner shape of the sleeve 21.