SEAL DF
The DF profile is a double-spring seal consisting of a single metal case with a reinforced rubber coating to prevent corrosion, and two sealing lips with springs. This design is specifically intended for the separation of two media or for use in situations with extreme external dirt accumulation on rotating shafts.
CHARACTERISTICS
- Good static sealing.
- Compensation of different thermal expansion.
- Reduced risk of fretting corrosion.
- A higher surface roughness of the bore is allowed.
- Modern primary sealing lips with low radial forces.
- Fluid separation system thanks to its two sealing lips.
- With a reinforced rubber coating to prevent corrosion.
See our gInstallation guide for oil seals to perform a correct installation of the seal.
| ø | ºC | bar | m/s |
|---|---|---|---|
|
20-790 mm |
-55ºC/225ºC |
≤ 0.3 bar |
≤ 10 m/s |
MATERIALS
Elastomer
NBR 70-75 Shore A
FKM 75-80 Shore A
VMQ 70-75 Shore A
ACM 70-75 Shore A
EPDM 70-75 Shore A
HNBR 70-75 Shore A
Metal Box
AISI 1060-90 - AISI 304 - AISI 316
Pier
AISI 1060-90 - AISI 302 - AISI 304 - AISI 316
| DIN 3760 ADUO |
|---|
TOLERANCES FOR THE OUTSIDE DIAMETER OF THE OIL SEAL
| Housing diameter | Metal cage | Elastomeric coating | Lace |
|---|---|---|---|
| ≤50.0 | +0.10 / +0.20 | +0.15 / +0.30 | +0.20 / +0.40 |
| <50.0 ≤80.0 | +0.13 / +0.23 | +0.20 / +0.35 | +0.25 / +0.45 |
| <80.0 ≤120.0 | +0.15 / +0.25 | +0.20 / +0.35 | +0.25 / +0.45 |
| <120.0 ≤180.0 | +0.18 / +0.28 | +0.25 / +0.45 | +0.30 / +0.55 |
| <180.0 ≤300.0 | +0.20 / +0.30 | +0.25 / +0.45 | +0.30 / +0.55 |
| <300.0≤500.0 | +0.23 / +0.35 | +0.30 / +0.55 | +0.35 / +0.65 |
| <500.0 ≤630.0 | +0.23 / +0.35 | +0.35 / +0.65 | +0.40 / +0.75 |
TOLERANCE FOR THE INNER DIAMETER OF THE SEAL
The inner diameter of the sealing lip is always smaller than the shaft diameter. Depending on the shaft size, the sealing lip diameter is generally between 0.8 and 3.5 mm smaller than the shaft diameter.
EN 
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FR 
