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Oil level sight glasses		 GN 743
GN 743.1


Type A with contrast screen Type B without contrast screen
d1 d2 d3 l1 l2 s
               
11 G 3/8 M 16 x 1,5   - 22 8 7,5 20
14 G  M 20 x 1,5   - 26 8,5 7,5 23
18 G  M 26 x 1,5 M 27 x 1,5 32 9 8 30
               
24 G 1 M 33 x 1,5   - 40 11 8,5 36
32 G 11/4 M 40 x 1,5 M 42 x 1,5 50 12 9 46
Specification Information How to order
Aluminum

matt shot-blasted

Contrast screen
Technopolymer (ULTRASON)
(not resistant to
Per-/Trichlorethylene)

GN 743
Temperature resistant
up to 100 °C
Sight glassnatural glass
Seal synthetic rubber
NBR (PERBUNAN)

GN 743.1
Temperature resistant
up to 180 °C
Sight glass specially treated
natural glass
Seal rubber FPM (VITON)
Identification by
non blackened finish

 Oil level sight glasses GN 743 offer the following features: Genuine glass of high stability and scratch proof. 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 affected by axial pressures.

The seal is housed in a groove 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 this seal allows also the use of a softer Elastomer which guarantees better and easier sealing.

Oil level sight glasses GN 743 / GN 743.1 can be used on pressurised oil tanks. Tests regarding maximum pressure are available on request.

Also, these oil level sight glasses are suitable for applications with subpressure.

Please note

When mounting oil level sight glasses on walls of less than 4 mm thickness please use nut partGN 543.1

 Oil level sight glass
GN 743-32-M40x1,5-A

Code No. 743
d1 32
d2 M40x1,5
Type A


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