The primary sealing benefit of the Hermetic version, but also provides very low breakaway and turning resistance.

PSV rolls are particularly well suited to conveyors that operate in very difficult conditions, where working loads are high and large lump material is conveyed; despite these conditions, no maintenance is required.

The effectiveness of a PSV roller sealing system provides the solution to the environmental challenges of dust, dirt, water, low and high temperatures or large temperature imbalances between day and night.