Body: Aluminum, turned, with with matte shot-blast finish
Prismatic reflector: Transparent plastic
Sealing ring: Nitrile rubber (Perbunan)
GN 744 fluid level sight glasses with prismatic reflector expand
the range and usage of oil level sight glasses. With the cats-eye
prism effect on the oil color, oil viscosity not-with-standing,
the view is quite clear. The real advantage of the prism effect
is when over-filling, under-filling and poor lighting situations
arise. Should not be used in applications where viewing of
alcohol level is required.
Fluid level sight glasses can also be used on pressurized tanks.
The data on pressure and vacuum tests is available upon request.
The O-ring is housed in the same aluminum body as the GN 743
oil level sight glasses.
The sealing is achieved with an O-ring on the periphery and
not on the face edge of the glass. Leak tightness is therefore
not effected by axial pressures.
The seal is put in a groove in the housing and it can therefore
not be lost, In addition, this groove prevents the seal from
being extruded when the sight glass is tightened. The location
of the seal also allows the use of a softer elastomer which
guarantees better and easier sealing.
Maximum heat resistance: 100°C (212°F).
Note: When mounting fluid level sight glasses on walls of less
than 4mm (.157") thick, use mounting nut part series GN