What is Flange Gasket ?
It's a sheet sandwiched between flanges.
It's mainly installed for sealing and protecting flanges.
Basically, flanges are determined by JIS standard, so we have a lineup of gaskets according to JIS standard.
Material
Non-asbestos joint sheet, rubber sheet, resin sheet, expanded graphite sheet, etc..
category | maker | material/standard | thickness |
non-asbestos joint sheet | Valuqa | 6500, 6500AC, 6502, 6503, 6503AC | 0.5, 0.8, 1.0, 1.5, 2.0, 3.0 |
synthetic rubber | Nichias | 1995, 1120, 1993 | 0.8, 1.0, 1.5, 2.0, 3.0 |
etc.. | Kulinger | ML-1, C-4430, C-4400 | 0.8, 1.0, 1.5, 2.0, 3.0 |
NR | Natural rubber | 0.8, 1.0, 1.5, 2.0, 3.0 | |
CR | Chloroprene rubber | 0.3, 0.5, 0.8, 1.0, 1.5, 2.0, 3.0 | |
NBR | Nitrile rubber | 0.3, 0.5, 0.8, 1.0, 1.5, 2.0, 3.0 | |
EPDM | Ethylene propylene rubber | 0.3, 0.5, 0.8, 1.0, 1.5, 2.0, 3.0 | |
VMQ | Silicone rubber | 0.5, 1.0, 1.5, 2.0, 3.0 | |
FKM | Fluoro rubber | 0.5, 1.0, 1.5, 2.0, 3.0 | |
PTFE | Fluoro resin | 0.5, 0.8, 1.0, 1.5, 2.0, 3.0 |
Product form
There are two types of Flange gaskets.
One is Front face type (FF type) and another is Rear face type (RF type).
- FF type is contacting (sealing) the whole surface of flange.
- RF type is contacting (sealing) only inner side of bolt hole.
