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Plastic Specification
Stainless Steel Characteristics

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GN7440 3D CAD Model

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GN7440 Sight Glass, Stainless Steel, AISI 316 L, Metal Fused

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GN7440 Sight Glasses, Stainless Steel, Metal Fused
Id. No. 2: FPM Seal



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GN7440 Sight Glasses, Stainless Steel, Metal Fused
Id. No. 3: Copper Seal



CAD Viewer Technical Data

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Type A - with reflector grooves

Identification number 2 - Seal, rubber FPM (Viton)

Identification number 3 - Seal, Copper

 

CAD Viewer Technical Data

Product Description

GN7440 Sight Glass, Stainless Steel, AISI 316 L, Metal Fused

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. Max. operating pressure in table (safety factor 5) is at -20 °C to 120 °C and shown in bar.

Specification

Body - Stainless steel AISI 316 L

Contrast screen - Grooves melted into sight glass

Sight glass - float-glass,  metal-fused, shrink-fit. 

Seals:

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)

On Request

NBR or EPDM seal

Related Series


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GN7440 Sight Glass Stainless Steel Sight Glass AISI 316 L Sight Glass Metal Fused Sight Glass Sight Glass with Reflector Grooves 100% Leakproof Sight Glass High Safety Sight Glass Sight Glass with Copper Seal Sight Glass with Rubber Seal