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GN 7440
Oil level sight glasses for high temperatures
AISI 316L stainless steel
Main specifications
Type
- Type A: with reflector
Identification no.
- No. 2: Seal FPM (Viton®)
- No. 3: Seal copper
Body
Stainless steel AISI 316L
Reflector
Grooves melted into sight glass
Sight glass float-glass
- Metal-fused
- Shrink-fit
Guarnizioni
- Rubber FPM (Viton®) (identification no. 2)
Temperature resistant up to 180 °C (without pressure load)
- Copper (identification no. 3)
Temperature resistant up to 300 °C (without pressure load)
General information
Features and applications
Stainless steel 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 particulary 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.
On request
On request
Seals of NBR or EPDM
Models all rights reserved in accordance with the law. Always mention the source when reproducing our drawings and photos.
