O-ring groove dimension for Vacuum flange
The O-ring groove dimensions for vacuum flanges are specified in JIS B 2290 standard
CS | groove depth（A） | groove width（Ｂ） |
4±0.10 | 3±0.1 | 5 +0.1/0 |
6±0.15 | 4.5±0.1 | 8 +0.1/0 |
10±0.30 | 7±0.1 | 12 +0.1/0 |
Dovetail O-ring groove
The main purpose is to prevent O-ring from falling off when the O-ring is installed, such as a valve, and sealing
■ for vacuum
unit : mm
O-ring | G±0.05 | G | H +0 -0.05 | R1 | R MAX | PDF | CAD | ||
standard | size | CS | before chamfering | after chamfering | |||||
JIS B 2401 | P22A~P50 | 3.5±0.10 | 3.05 | 3.27 | 2.5 | 0.20 | 0.80 | ||
P48A~P150 | 5.7± 0.13 | 4.95 | 5.38 | 4.2 | 0.40 | 0.80 | |||
P150A~P400 | 8.4± 0.15 | 7.35 | 7.89 | 6.3 | 0.50 | 1.60 | |||
V15~V175 | 4± 0.10 | 3.45 | 3.77 | 2.9 | 0.30 | 0.80 | |||
V225~V430 | 6± 0.15 | 5.25 | 5.68 | 4.4 | 0.40 | 0.80 | |||
V480~V1055 | 10± 0.30 | 8.70 | 9.24 | 7.6 | 0.50 | 1.60 | |||
AS568 | 201~284 | 3.53± 0.10 | 3.07 | 3.34 | 2.51 | 0.25 | 0.79 | ||
309~395 | 5.33± 0.12 | 4.62 | 5.03 | 3.91 | 0.38 | 0.79 | |||
425~475 | 6.98± 0.15 | 6.12 | 6.53 | 5.21 | 0.38 | 1.59 | |||
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