SPGW
Description
High-performing, double acting compact piston seal composed of a dynamic bronze-filled PTFE friction ring, profiled pre-tightened NBR ring and two POM back-up rings.
Low friction coefficient; no stick-slip effect.
Possible increase in extrusion gaps.
Excellent extrusion resistance even during pressure peaks.
Excellent abrasion resistance.
Assembled by deformation.
* This is a seal for high pressure operation with improved ability of SPG for oil scraping off.
* Backup Ring material of polyamide resin assures high longevity.
Application
Mobile machinery
Hydraulic cylinders
Materials
Sliding Material Rareflon (PTFE) ,Polyamide Resin, Nitrile Rubber (NBR)
TECHNICAL DATA
TECHNICAL DATA
| Temperature | -40°C/+100°C |
| Pressure | 50 MPa |
| Speed | 1.5 m/s |
| Medias | Mineral hydraulic oils |
MATERIALS
MATERIALS
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 |
PTFE
| Friction ring | Profiled seal | Contact surface area | ||||
|---|---|---|---|---|---|---|
| Code | Type of material | Colour | Code | Type of material | Service temperature | |
| DB | PTFE + 60% Bronze | Dark brown | K8 | NBR 80 Shore A | -30°C/+100°C | Steel, chrome steel, Cast iron |
DIMENSION
DIMENSION
| Internal Diameter (d) | Outside Diameter (D) | Height (H) |
|---|---|---|
| 50 | 36 | 9 |
| 60 | 46 | 9 |
| 63 | 48 | 11 |
| 65 | 50 | 11 |
| 70 | 55 | 11 |
| 75 | 60 | 11 |
| 80 | 65 | 11 |
| 85 | 70 | 11 |
| 90 | 75 | 11 |
| 95 | 80 | 11 |
| 100 | 85 | 12.5 |
| 105 | 90 | 12.5 |
| 110 | 95 | 12.5 |
| 115 | 100 | 12.5 |
| 120 | 105 | 12.5 |
| 125 | 102 | 16 |
| 130 | 107 | 12.5 |
| 135 | 112 | 12.5 |
| 140 | 117 | 12.5 |
| 150 | 127 | 12.5 |
| 160 | 137 | 12.5 |
| 170 | 147 | 12.5 |
| 180 | 157 | 12.5 |
| 185 | 162 | 12.5 |
| 190 | 167 | 12.5 |
| 200 | 177 | 12.5 |
| 210 | 187 | 12.5 |
| 220 | 197 | 12.5 |
| 225 | 202 | 12.5 |
| 230 | 207 | 12.5 |
| 240 | 217 | 12.5 |
| 250 | 222 | 17.5 |
| 260 | 232 | 17.5 |
| 270 | 242 | 17.5 |
| 280 | 252 | 17.5 |
| 300 | 272 | 17.5 |
| 320 | 292 | 17.5 |