An
extensive line of hydrant and ground service pits have been
developed since our beginning more than forty years ago. The
broad range of services are available in either
welded steel construction or molded fiberglass. Round, square
or rectangular pit configurations can be furnished and valves,
piping, electrical components, cable and or hose may be factory
installed, to simplify field installation.
Welded steel pits are offered as cover and frame only, cover,
frame and shell, or cover, frame, shell and bottom. A flexible
sealing boot is fitted on both steel and fiberglass pits that
have piping entering from the bottom or sides of the pit. This
prevents the entry of ground water, helps prevent fuel spills
from entering the ground and allows for some movement of the
riser pipe. This feature is standard on all complete fiberglass
fuel hydrant pits. However, the feature is optional on steel.
Molded fiberglass ground service pits offer some advantages
over the welded steel type. They are non-corrosive, non-magnetic
and non-sparking. In addition molded fiberglass pits are light
weight one piece construction allowing for easier
installation. Pit covers are manufactured from
high strength cast aluminum (alloy 712) designed to support
the heaviest aircraft loading.
GNY is equipped with facilities for providing
proof load testing of all pit covers. Testing is carried out using one or two 200 sq. inch tire prints,
according to pit cover size. Loads up to 100 tons per tire
print can be applied. Standard covers are tested to 2.5:1
factor of safety. "PA" covers are tested to a 4:1
factor of safety using a hydraulic test fixture of our own
design and manufacture. A certified load test report can be
supplied. Production tests are conducted on the statistical
basis required by MIL-STD-105. |