AS568-460 FFKM O-Ring — 393.07 × 6.99 mm
A very thick section for the largest diameters and most severe static sealing duties. With an inside diameter of 393.07 mm and a 6.99 mm cross section, this is a very-large seal for the largest diameters and heavy static service. Moulded from Aperflu 2275 perfluoroelastomer (FFKM) for continuous service up to 200 °C, this seal resists hot acids, caustics, solvents, fuels and steam.
Dimensions
| Dash number | AS568-460 |
|---|---|
| Inside diameter (ID) | 393.07 mm (15.475 in) |
| Cross section (CS) | 6.99 mm (0.275 in) |
| Outside diameter (OD) | 407.05 mm (16.026 in) |
| Material | Aperflu 2275 perfluoroelastomer (FFKM) |
| Service temperature | up to 200 °C continuous |
Pharmaceutical and food processing
Steam-in-place and clean-in-place cycles, aggressive cleaning agents and potent active pharmaceutical ingredients (APIs) demand a seal that stays inert and dimensionally stable. Aperflu 2275 is suited to product-contact and CIP/SIP duties where extractables must be kept to a minimum.
Why Aperflu 2275 FFKM
Aperflu 2275 delivers Kalrez-class performance in aggressive media at a factory-direct price, with every AS568 size moulded to order and published unit pricing.
Typical applications
Large-diameter flanges, autoclave and reactor seals, structural static joints, where Aperflu 2275 outperforms FKM and EPDM in aggressive media and elevated temperature.
Compound properties
| Property | Typical value | Test method |
|---|---|---|
| Hardness | 70 – 71 Shore A | GB/T 39693.4 |
| Tensile strength | 21.2 – 21.8 MPa | GB/T 528 (dumbbell type 2) |
| Elongation at break | 155 – 170 % | GB/T 528 (dumbbell type 2) |
| Compression set, 200 °C × 70 h (25 %, method B) | 15 – 16 % | GB/T 7759.1 |
All values are typical. Every batch is shipped with an individual certificate of analysis and may differ from the typical values listed here.
Chemical resistance
| Media group | Rating |
|---|---|
| Hot organic & inorganic acids | Excellent |
| Caustics (NaOH up to 50 %) | Excellent |
| Ketones, aldehydes, esters, ethers, alcohols | Excellent |
| Solvents, fuels, hydrocarbons, sour gases | Excellent |
| Steam and hot water | Excellent |
| Amines (high temperature, concentrated) | Good – contact us for grade selection |
| Clean-in-place (CIP) / steam-in-place (SIP) agents | Excellent |
| Active pharmaceutical ingredients (APIs) | Excellent |
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