Specification
Type
- Type A: With reflector grooves
Identification no.
- No. 2: Seal FKM
- No. 3: Seal copper
Body
Stainless steel AISI 316L
Sight class
Float-glass
Contrast screen
Grooves melted into sight glass
Seal
- Fluorine rubber (FKM) for identification no. 2
- Operating temperature up to 180 °C
- Copper for identification no. 3
- Operating temperature up to 300 °C
Information
Sight glasses GN 7440 are equipped with a sight glass that is metal-fused to the body by a thermal process. As a result the liquid glass adapts precisely to the contour of the body. During cooling, the different coefficients of linear expansion of the two joining partners generate strong mechanical initial stress between the glass and metal.
This initial stress makes the sight glasses 100% leakproof and particularly resistant to dynamic pressures and high temperatures when used with liquid and gaseous media. Moreover, the site glass offers a high level of safety, as potential damage is indicated in advance by small cracks without breakage of the glass. The seal is embedded in a radial recess, and thus cannot be lost or squeezed out during tightening.
The recommended operating pressures are non-binding values and rule out any liability. The user must determine from case to case whether a product is suitable for the intended use. Environmental factors can influence the specified values.
Assembly Instruction
For mounting on walls of less than 4 mm thickness please use mounting nuts GN 7430.
