Fluid Sight Glasses GN 7440

Photo

Identification no.: 2 - Seal FPM (Viton^®)

GN 7440 Stainless Steel AISI 316L Fluid Sight Glasses, Metal-Fused Identification no.: 3 - Seal copper

Product Family Stainless Steel

Standard parts made of rustproof stainless steel have been designed for use in the food sector, in the chemical industry, for aggressive ambient conditions or for outdoor use.

corrosion-resistant
precise fit
environmentally friendly

Show all Stainless Steel products

Standard Sheet GN 7440 Print This Page Plastic Characteristics Stainless Steel Characteristics

Product description

Information

Fluid 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.

Specification

Body
Stainless steel AISI 316L

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 356 °F (180 °C)
(without pressure load)
Copper (Identification no. 3)
Temperature resistant up to 572 °F (300 °C)
(without pressure load)

RoHS

On request

Seals of NBR or EPDM

Build & Price

Part Number	d₁	d₂Pipe thread	Fine thread	d₃	l₁	l₂	s	Max. operating pressure (safety factor 5) at -4 °F to 248 °F (-20 °C to 120 °C) in bar

7440-11-G3/8-A-2	0.43	G 3/8	-	0.87	0.31	0.30	0.79	80
7440-11-M16X1.5-A-2	0.43	-	M 16 x 1.5	0.87	0.31	0.30	0.79	80
7440-14-G1/2-A-2	0.55	G 1/2	-	1.02	0.33	0.30	0.91	80
7440-14-M20X1.5-A-2	0.55	-	M 20 x 1.5	1.02	0.33	0.30	0.91	80
7440-18-G3/4-A-2	0.71	G 3/4	-	1.26	0.35	0.31	1.18	80
7440-18-M26X1.5-A-2	0.71	-	M 26 x 1.5	1.26	0.35	0.31	1.18	80
7440-24-G1-A-2	0.94	G 1	-	1.57	0.43	0.33	1.42	80
7440-24-M33X1.5-A-2	0.94	-	M 33 x 1.5	1.57	0.43	0.33	1.42	80
7440-32-G11/4-A-2	1.26	G 1 1/4	-	1.97	0.47	0.35	1.81	40
7440-32-M42X1.5-A-2	1.26	-	M 42 x 1.5	1.97	0.47	0.35	1.81	40

Part Number	d₁	d₂Pipe thread	Fine thread	d₃	l₁	l₂	s	Max. operating pressure (safety factor 5) at -4 °F to 248 °F (-20 °C to 120 °C) in bar

7440-11-G3/8-A-3	0.43	G 3/8	-	0.87	0.31	0.30	0.79	80
7440-11-M16X1.5-A-3	0.43	-	M 16 x 1.5	0.87	0.31	0.30	0.79	80
7440-14-G1/2-A-3	0.55	G 1/2	-	1.02	0.33	0.30	0.91	80
7440-14-M20X1.5-A-3	0.55	-	M 20 x 1.5	1.02	0.33	0.30	0.91	80
7440-18-G3/4-A-3	0.71	G 3/4	-	1.26	0.35	0.31	1.18	80
7440-18-M26X1.5-A-3	0.71	-	M 26 x 1.5	1.26	0.35	0.31	1.18	80
7440-24-G1-A-3	0.94	G 1	-	1.57	0.43	0.33	1.42	80
7440-24-M33X1.5-A-3	0.94	-	M 33 x 1.5	1.57	0.43	0.33	1.42	80
7440-32-G11/4-A-3	1.26	G 1 1/4	-	1.97	0.47	0.35	1.81	40
7440-32-M42X1.5-A-3	1.26	-	M 42 x 1.5	1.97	0.47	0.35	1.81	40

d₁	d₂Pipe thread	Fine thread	d₃	l₁	l₂	s	Max. operating pressure (safety factor 5) at -4 °F to 248 °F (-20 °C to 120 °C) in bar

0.43	G 3/8	M 16 x 1.5	0.87	0.31	0.30	0.79	80
0.55	G 1/2	M 20 x 1.5	1.02	0.33	0.30	0.91	80
0.71	G 3/4	M 26 x 1.5	1.26	0.35	0.31	1.18	80
0.94	G 1	M 33 x 1.5	1.57	0.43	0.33	1.42	80
1.26	G 1 1/4	M 42 x 1.5	1.97	0.47	0.35	1.81	40

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Total US Dollars (net)

$38.54

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Quantity

Please note our quantity discounts (US Dollars).

Min	Max	Price
1	24	$38.54
25	49	$35.33
50	99	$32.12
≥ 100		$28.90

Prop 65: Not compliant

WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov

RoHS: Compliant

This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).

Weight: 0.048 lbs

If weight is not listed, please contact our Sales Department for additional information regarding weight.
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All Prices are in US Dollars. Taxes Not Included.