When the field of application and system requirements make high demands on leakage control and operational reliability, a redundant sealing system is necessary to ensure reliable sealing of hydraulic cylinders at the piston rod. Sealing systems with elastomer-energised polymer seals are a proven answer to widely varying demands for standardised grooves, simple installation, resistance to media, high and low temperatures and pressures.
Comment: assessing the future of Britain’s road network
It seems to me, as I drive around, that a significant proportion of potholes are not actually potholes at all, but sunken grids and manhole covers....