DIN 11853-2 Form A Dimension
Unit: mm Form A: Flange with O-ring groove (Nutflansch, NF) Mating part: Form B (Glattflansch, GF, plain face flange). Flange OD, PCD and bolt holes are identical for Form A & B. O-rings are interchangeable between DIN 11853 2 (short type) and DIN 11864 2 (long type) DIN 11853-2 Form A Dimension
ISO DIN11853-2 o-ring
DIN 11853-2 Form A Dimension Table
| DN | Flange OD D | PCD | Bolt Qty & Size | O-Ring (ID × CS) | Tube OD DIN11866 A |
| DN10 | 54 | 41.5 | 4 × M8 | 12 × 3.5 | 12.7 |
| DN15 | 59 | 42.0 | 4 × M8 | 18 × 3.5 | 19.0 |
| DN20 | 64 | 47.0 | 4 × M8 | 22 × 3.5 | 23.0 |
| DN25 | 70 | 53.0 | 4 × M8 | 28 × 3.5 | 29.0 |
| DN32 | 76 | 59.0 | 4 × M8 | 34 × 5.0 | 35.0 |
| DN40 | 82 | 65.0 | 4 × M8 | 40 × 5.0 | 41.0 |
| DN50 | 94 | 77.0 | 4 × M10 | 52 × 5.0 | 53.0 |
| DN65 | 112 | 94.0 | 8 × M10 | 68 × 5.0 | 70.0 |
| DN80 | 127 | 109.0 | 8 × M10 | 82 × 5.0 | 85.0 |
| DN100 | 142 | 124.0 | 8 × M10 | 98 × 5.0 | 104.0 |
| DN125 | 162 | 144.0 | 8 × M12 | 122 × 5.0 | 129.0 |
| DN150 | 182 | 164.0 | 8 × M12 | 142 × 5.0 | 154.0 |
Technical Notes
- Pressure rating @ -10 ℃ ~ +140 ℃ with suitable elastomer:
- DN10 ~ DN40 (Tube OD 12.7 ~ 41.0): 25 bar
- DN50 ~ DN100 (Tube OD 53 ~ 104): 16 bar
- DN125 ~ DN150 (Tube OD 129 ~ 154): 10 bar
- Flange type: DIN 11853-2 Form A, short hygienic flange, butt-weld end.
- Tube: DIN 11866 Series A / DIN EN 10357 Series A sanitary tube.
- Surface finish: Default H3, Ra ≤0.8 μm internal; sterile application Ra ≤0.4 μm optional.
- O-ring materials: EPDM, VMQ, FKM, HNBR, FFKM; FDA 21 CFR 177.2600 / EU 10/2011 / USP Class VI available upon request.
- Material options: 1.4301, 1.4307 (304/304L), 1.4404, 1.4435 (316L).
We supply o-rings meet standard of DIN 11853-2 Form A, please request us if any demand.
Email: sales@bosssealing.com