| 摘要 |
An air drier arrangement comprises an air compressor (1), an air drier (3) and air conduits (2, 4). In order to obtain favourable working conditions for the arrangement under different temperatures there is a switch-over valve (6) in a separate signal air pipe (5) from the air drier to the compressor. This valve is operable between a first position, giving a governor mode for the arrangement, and a second position, giving an unloader mode for the arrangement. The operation of the valve may be governed by a thermostat (9).
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