Type A - with prismatic effect (only d1 = 14/18/24)
Type B - without contrast screen (all sizes)
Type C - with red marking ring (only d1 = 11/14/18/24)
GN744 Oil Level Sight Glass, Aluminium, Prismatic Plastic View
Prismatic oil level sight glasses GN 744 use the prismatic effect of a cats eye to display the oil level unaffected by oil colour or oil viscosity. The advantage of this effect is particularly obvious in the case of under or overfilling or for inspection under unfavourable light conditions.
The seal is housed in a radial groove in the aluminium body and hence cannot be lost. In addition it cannot be extruded when tightening the sight glass.
For this reason the seal can be of a relatively soft material which increases it's sealing capacity even on uneven surface.
Oil level sight glasses GN744 can also be used on pressurised tanks. Pressure and vacuum pressure test data is available.
When mounting oil level sight glasses on walls of less than 4 mm thickness please use fixing nuts GN543.1
Body - aluminium AL, fine turned.
Sight glass - plastic, crystal-clear Polyamide (PA 6-T), red marking ring, pad printing
Temperature resistant up to 110°C
Sealing ring - rubber NBR (Perbunan)
Fixing nuts GN543.1