Patent ID: 6648006
Filing Date: 2003-11-18
Classification: F16K,G01N,Y10T

Abstract:
A valve (1) comprising:a through-going axial bore (4); a first spindle (5) axially displaceable in the bore (4); an elastic/flexible seal (10) placed at one end surface (6) of the first spindle (5); at least two hollow connection branches (7,8) for withdrawal of samples, each of which connects the valve to an outer coupling; said first spindle (5) in a first position forming a first annular seating surface (9) between the outer surface of the seal (10) and an inner bottom (11) of the valve body which contains an inlet opening (29) from which samples are drawn into the valve; the first spindle (5) lies coaxially inside a second axially displaceable and hollow spindle (12) lying in the bore (4); and the end surface of the second spindle or parts thereof (13) forming a second annular seating surface (14) between the outer surface of the seal (10) and the inner bottom (11) of the valve body at a second position radially spaced from the first annular seating surface (9).