| 摘要 |
The invention relates to piping distributors, with which radiators can be selectively connected to one-pipe or two-pipe central-heating systems. The tubular housing (0) has a first connecting branch (1) for the radiator return pipe, a second connecting branch (2) for the radiator flow pipe, a third connecting branch (3) for the hot-water supply pipe and a fourth connecting branch (4) for the hot-water discharge pipe. An outer spindle (5, 6) with inserted inner spindle (7) is provided in the housing (0). The outer spindle (5, 6) is sealed off at one end from the first connecting branch (1). In addition, it is longitudinally displaceable with respect to this connecting branch (1). Two mutually spaced outer sealing rings (6.1, 6.2) are provided on the outer circumference of the outer spindle (6), the first outer sealing ring (6.1) cooperating with a short inner sealing ring (0.1) in the housing (0), and the second outer sealing ring (6.2) cooperating with a long inner sealing cylinder (0.2). A window (6.3) is provided in the outer spindle (6) between the outer sealing rings (6.1, 6.2). With the aid of the piping distributor according to the invention, the radiator can be emptied via the first connecting branch (1) once the inner spindle (7) has been opened, without the central-heating system connected to the connecting branches (2, 3, 4) having to be emptied at the same time. <IMAGE>
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