Turcon Variseal W2 is a single acting seal consisting of a U-shaped jacket and a corrosion resistant Slantcoil spring. The Slantcoil spring in the Variseal W2 provides an almost constant load irrespective of hardware tolerances, eccentricity and seal wear.
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....