ISO Flange Centering Ring Viton® O-Rings

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Overview

These Viton® O-rings can be used as spares or to replace the O-rings on our ISO centering ring seal assemblies. Viton® (V747-75 compound) is black colored elastomer with a bakeout rating of 180°C and lasts longer than Buna-N.

Replacement Viton® O-rings for ISO centering rings
180 °C maximum temperature
Keep as spares for increased up-time

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Products

Compare	Description	Compatibility	rankScore	Flange Size	Inner Diameter	Thickness	Availability	Price
100762006 Viton O-Ring, NW63 Size ISO-MF Vacuum Flange, 2-336 O-Ring Size $13.83 Show	100762006 Viton O-Ring, NW63 Size ISO-MF Vacuum Flange, 2-336 O-Ring Size	UNIVERSAL	1.0	NW63	2.85 in. (72 mm)	0.21 in. (5 mm)	Show	$13.83
100762008 Viton O-Ring, NW80 Size ISO-MF Vacuum Flange, 2-340 O-Ring Size $16.43 Show	100762008 Viton O-Ring, NW80 Size ISO-MF Vacuum Flange, 2-340 O-Ring Size	UNIVERSAL	1.0	NW80	3.35 in. (85 mm)	0.21 in. (5 mm)	Show	$16.43
100762010 Viton O-Ring, NW100 Size ISO-MF Vacuum Flange, 2-346 O-Ring Size $30 Show	100762010 Viton O-Ring, NW100 Size ISO-MF Vacuum Flange, 2-346 O-Ring Size	UNIVERSAL	1.0	NW100	4.10 in. (104 mm)	0.21 in. (5 mm)	Show	$30
100762016 Viton O-Ring, NW160 Size ISO-MF Vacuum Flange, 2-361 O-Ring Size $37 Show	100762016 Viton O-Ring, NW160 Size ISO-MF Vacuum Flange, 2-361 O-Ring Size	UNIVERSAL	1.0	NW160	5.98 in. (152 mm)	0.21 in. (5 mm)	Show	$37
100762020 Viton O-Ring, NW200 Size ISO-MF Vacuum Flange, 2-371 O-Ring Size $39 Show	100762020 Viton O-Ring, NW200 Size ISO-MF Vacuum Flange, 2-371 O-Ring Size	UNIVERSAL	1.0	NW200	8.48 in. (215 mm)	0.21 in. (5 mm)	Show	$39
100762025 Viton O-Ring, NW250 Size ISO-MF Vacuum Flange, 2-378 O-Ring Size $47 Show	100762025 Viton O-Ring, NW250 Size ISO-MF Vacuum Flange, 2-378 O-Ring Size	UNIVERSAL	1.0	NW250	10.48 in. (266 mm)	0.21 in. (5 mm)	Show	$47
100762032 Viton O-Ring, NW320 Size ISO-MF Vacuum Flange, 2-454 O-Ring Size $57 Show	100762032 Viton O-Ring, NW320 Size ISO-MF Vacuum Flange, 2-454 O-Ring Size	UNIVERSAL	1.0	NW320	12.48 in. (317 mm)	0.28 in. (7 mm)	Show	$57
100762040 Viton O-Ring, NW400 Size ISO-MF Vacuum Flange, 2-460 O-Ring Size $60 Show	100762040 Viton O-Ring, NW400 Size ISO-MF Vacuum Flange, 2-460 O-Ring Size	UNIVERSAL	1.0	NW400	15.48 in. (393 mm)	0.28 in. (7 mm)	Show	$60
100762050 Viton O-Ring, NW500 Size ISO-MF Vacuum Flange, 2-468 O-Ring Size $79 Show	100762050 Viton O-Ring, NW500 Size ISO-MF Vacuum Flange, 2-468 O-Ring Size	UNIVERSAL	1.0	NW500	19.46 in. (494 mm)	0.28 in. (7 mm)	Show	$79
100762063 Viton O-Ring, NW630 Size ISO-BF Vacuum Flange, 2-474 O-Ring Size $120 Show	100762063 Viton O-Ring, NW630 Size ISO-BF Vacuum Flange, 2-474 O-Ring Size	UNIVERSAL	1.0	NW630	24.94 in. (634 mm)	0.28 in. (7 mm)	Show	$120

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Specifications

Component Type

O-Ring
Series

Series 76

Flange Type

ISO-MF: (NW63 to NW500)
ISO-BF: NW630
Seal Material

Viton

Features

Elastomer Seal Comparison

	Buna-N	Viton
Compound	N674-70	V747-75
Color	Black	Black
Bakeout	80°C	150°C
Benefits	Seals easier, lower cost	High temperature, lasts longer

Viton® is recommended where temperatures, chemical resistance or long installed life make it beneficial. Use Buna-N where temperatures are moderate, and installed useful life is consistent with this material. The centering ring is available in stainless steel or aluminum. Use stainless steel where chemical resistance is needed. Flanges and seals are designed to be tightened to metal to metal contact.