Unloading systems

Scherzer does not only plan and supply railcar unloading systems, but provides the design for the complete unloading system including all trades, such as automation, loading and unloading computer, data logging systems, piping systems, power supply, buildings etc.

In 1977, the first tanker railcar unloading system was planned and delivered by Scherzer. Since that time, Scherzer has planned, delivered and commissioned railcar unloading systems either under a specific contract or in connection with the construction of a tank farm.

Unloading systems for railcars and the associated automation equipment are designed in accordance with the respective local conditions and the customer’s requirements.


Transfer stations consist of articulated steel tube loading units or hose systems with manual valves or sensor-controlled valves.
Products are filled into the tanks via a combined manifold system using controlled pumps.The distributor may be emptied after each loading process using a residual discharge system.

Railcar unloading systems can be supplied with a low level of automation, which will mean, however, that more personnel are needed at the unloading station.

On the other hand, near-complete automation is possible. After opening the dome cover, connecting the unloading equipment, opening the bottom valve and activating a start button on the central control system or on the local panel, unloading is controlled in a fully automatic way and displayed in the control system.

The product unloaded is measured with calibrated equipment.
Measured data can be recorded via calibrated tank level measuring devices or via meters installed in the product line. In this way it is possible to measure and display the product flow.

The most modern facilities are currently in a tank farm in Poland (Ostrow Wielkopolskie /ORLEN). This plant is largely operated in a fully automatic way. Opening and closing of the dome, connecting the hose and opening and closing the manual valve on the railcar have to be carried out manually. The complete process up to the full unloading of the railcars is fully automatic. The connecting points are monitored by sensors; the valves and the
frequency-controlled pump are controlled and monitored based on the filling level in the tank, using a PLC developed by SCHERZER.

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