PROBENAUFGABE- BZW. -ENTNAHMEKOPF FUER GAS ODER FLUESSIGKEIT.

摘要

The sampling head has an internal bore (5) communicating with an insertion bore (4) for an injection needle in an insertion guide (3) attached to the head (1) via an intermediate seal (6). The internal bore (5) is sealed by a sliding valve element (11) displaced into the open position by the inserted injection needle. The valve element (11) is contained within a cylindrical guide (8) allowing its linear displacement at an angle of between 90 and 180 degrees, eg between 120 and 150 degrees, to the axis of the bore (5), against a return spring bias provided by a coaxial coil spring (17). The end of the valve element (11) has a reduced dia projection and a reset annular sealing surface.