NCF
Description
A high-performing, double acting compact piston seal composed of a profiled rubber ring with special fibre reinforcements and a POM wear/back-up ring.
Good sealing effect.
Excellent extrusion & wear resistance.
Reliable sealing for significant and sudden pressure variations.
Application
Excavators
Heavy duty hydraulic cylinders
Materials
Polyoxymethylene(POM) + Nitrile rubber(NBR)
TECHNICAL DATA
TECHNICAL DATA
| Temperature | -30°C/+100°C |
| Pressure | 35 MPa |
| Speed | 0.5 m/s |
| Medias | Mineral hydraulic oils |
MATERIALS
MATERIALS
Polyoxymethylene (POM)
Polyoxymethylene (POM or polyacetal) belongs to the thermoplastics, which have a number of advantages – strong mechanical resistance, good creep strength, high resistance to shocks, particularly at low temperatures, good wear resistance, good sliding coefficient, excellent machinability and good dielectric properties. The low water absorption coefficient, unlike polyamide (PA), also gives this material an excellent dimensional stability.
| Chemical resistance | Aliphatic hydrocarbons (propane, butane, petroleum, diesel fuel) Mineral oils and greases Fire-resistant fluids (HFA, HFB and HFC) Water |
|---|---|
| Compatibility issue | Acids |
| Temperature range | -50°C/+115°C |
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 | -25°C/+100°C |
DIMENSION
DIMENSION
| Internal Diameter (d) | Outside Diameter (D) | Height (H) | Pieces |
|---|---|---|---|
| 63 | 50 | 42 | 5 pcs |
| 70 | 58 | 42 | |
| 80 | 68 | 42 | |
| 90 | 78 | 42 | |
| 100 | 88 | 42 | |
| 110 | 98 | 42 | |
| 120 | 108 | 42 | |
| 140 | 128 | 42 | |
| 150 | 138 | 42 | |
| 50 | 38 | 28 | 3 pcs |
| 55 | 43 | 28 | |
| 60 | 48 | 28 | |
| 63 | 50 | 28 | |
| 65 | 53 | 28 | |
| 70 | 58 | 28 | |
| 75 | 63 | 28 | |
| 80 | 68 | 33 | |
| 85 | 71 | 33 | |
| 90 | 78 | 33 | |
| 100 | 88 | 33 | |
| 105 | 91 | 33 | |
| 110 | 98 | 33 | |
| 120 | 108 | ||
| 125 | 113 | 28 | |
| 130 | 118 | 28 | |
| 140 | 123 | 48 | |
| 150 | 138 | 28 | |
| 160 | 143 | 40 | |
| 180 | 163 | 41 | |
| 220 |