Air supply columns and yard compressed-air network

The yard compressed-air network carries air from the compressor station to every working point: brake testing units, car brake hoses, car inspectors' pneumatic tools and pneumatically driven devices. Columns are spaced along the tracks so that the standard hose reaches any car of the train without moving equipment.

The main is made of steel pipe with an anti-corrosion coating and is laid in trays between the tracks or on low supports; automatic condensate drains are installed at the low points, and sectioning valves allow a section to be isolated for repair without shutting down the whole yard. A column is a steel post with a shut-off valve, a filter and moisture separator and one or two outlets with brake-type coupling heads; in the cold-climate version the post is insulated and fitted with valve heating.

The network is designed for simultaneous charging of several trains with a limited pressure drop at the end of the main. INVIN GROUP performs the pipe sizing, supplies pipes, valves, columns, hose reels and fasteners as a complete kit, installs the network at the customer's site and carries out pneumatic testing. On request the columns are supplemented with 24 V power points, lighting and track number indicators.