PolyPaks are precision moulded, multi-purpose seals which combine an o-ring type rubber “O-Spring” with a conventional lip seal to provide a unique sealing device which is capable of sealing both vacuum, high and low pressure.
PolyPak seals are available in 3 styles; Standard Polypak, Deep Polypak and Type “B” Polypak.
The PolyPak seal offers a number of advantages over conventional u-cup seals:
The O-Spring stabilises the seal under extreme pressures, preventing seal lip distortion and rolling or twisting in the gland.
At low or high temperature extremes, the O-Spring maintains lip loading on both the I.D. and O.D. of the seal interface.
The PolyPak seal can be stretched or squeezed to accommodate oversized cylinder bores and undersized rods.