Fabrication - The cylinder shock absorber - Back

The PRETAL access door uses oil filled cylinders pressurized
with nitrogen in all types. These cylinders reduce the operational
forces on the leaf, allowing an effort not exceding 22 kg (50 lbs)
from the operator. Their quantity and pressure loading are
determined by the size and load capacity of the access door.

The cylinders are fabricated from high quality materials. The
mounting accessories are fabricated from 304 stainless steel
for optimum service.

For the aluminum and galvanized steel hatch, the cylinder's tube
is made of heat cured epoxy painted steel, color black, applied
by the cylinder manufacturer.
For the stainless steel hatch, the cylinder is made of stainless

The stability of compressed nitrogen allows efficient operation
at all temperature extremes.

          Modular construction allows quick and easy replacement.