PLS, Pin Lube System

PLS Shield Body, the "Blue Ring" enables sectional placement of lubricant around the shield

Soil Mixing Pins

The Pin Lube System is a shield body that is placed directly behind the tunneling machine. The protruding pins create a soil mixing action that, used with automated valves, allow an exact placement of lubricant.

Creating this lubricant zone as the tunnel excavation is being made ensures no dry spots along the pipe string when coupled with the proper injection of lubricant during pipe jacking.

The PLS valves can be tied into the electrics of the ABIS to provide a complete solution to difficult ground conditions or long drives.