DB
Description
None
Application
None
Materials
Polyacrylate (ACM) + Nitrile Rubber (NBR)
TECHNICAL DATA
TECHNICAL DATA
| Temperature | None -30°C/+100°C |
| Pressure | None 30 MPa |
| Speed | None 1.0 m/s |
| Medias | None Mineral hydraulic oils |
MATERIALS
MATERIALS
ACM
Polymers containing ethyl acrylate (or butyl acrylate) have a small amount of monomer, which is necessary for cross-linking; ACM is a material with better heat resistance than NBR. It is often used for automatic gearboxes.
| Chemical resistance | Mineral oils (motor oils, gear box oils, ATF oils) Atmospheric and ozone agents |
|---|---|
| Compatibility issue | Glycol-based brake fluids (Dot 3 & 4) Aromatic and chlorinated hydrocarbons Water and steam Acids, alkalis and amines |
| Temperature range | -25°C to + 150°C (short-term peak at +160°C) -35°C / +150°C with particular ACMs |
NBR
Nitrile rubber (NBR) is the general term for acrylonitrile-butadiene copolymer. The ACN content can vary between 18% and 50%. While the acrylonitrile content is important, the resistance to oil and fuel is more so. Conversely, the elasticity and compression set are not as good. The NBR has good mechanical properties and good wear resistance. However, its resistance to atmospheric agents and the ozone is relatively low.
| Chemical resistance | Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel) Mineral oils and greases Fire-resistant fluids (HFA, HFB and HFC) Diluted acids, low-temperature alkaline and saline solutions Water (up to +100°C max) |
|---|---|
| Compatibility issue | Fuels with high aromatic content Aromatic hydrocarbons (benzene) Chlorinated hydrocarbons (trichlorethylene) Polar solvents (ketone, acetone, acetic acid, ethylene-ester) Strong acids Glycol-based brake fluids Atmospheric and ozone agents |
| Temperature range | -30°C / +100°C (short-term peak at +120°C) -40°C / +100°C with particular NBRs |
DIMENSION - DB type NBR
DIMENSION - DB type NBR
| Item | Internal Diameter (d) | Outside Diameter (D1 H8) | Height (H) |
|---|---|---|---|
| AW 2870 JO | 50 | 72 | 18 |
| AW 3057 EO | 55 | 78 | 18 |
| AW 3225 EO | 60 | 82 | 18 |
| AW 3623 EO | 75 | 100 | 20 |
| AW 3935 E1 | 90 | 115 | 20 |
| AW 3946 EO | 90 | 125 | 28 |
| AW 4068 EO | 100 | 125 | 20 |
| AW 4215 E1 | 110 | 140 | 22 |
DIMENSION - DB type ACM
DIMENSION - DB type ACM
| Item | Internal Diameter (d) | Outside Diameter (D1 H8) | Height (H) |
|---|---|---|---|
| AW 2678 EO | 45 | 70 | 15 |
| AW 3237 FO | 60 | 85 | 22 |
| AW 3747 IO | 80 | 105 | 20 |
| AW 3935 FO | 90 | 115 | 20 |
| AW 3997 FO | 95 | 120 | 20 |
| AW 4287 FO | 115 | 145 | 22 |
| AW 4401 EO | 125 | 155 | 22 |
| AW 4455 EO | 130 | 160 | 22 |