KDA PISTON SEAL
KDA type piston seal it is mainly used in the presence of elevated pressures and the anti-extrusion ring allows high coupling clearances and high structural deformations without the danger of extrusion. Asymmetrical lips are designed for differentiate behavior on surfaces static and dynamic: the static one guarantees a large contact surface; that dynamic is shorter and stiffer to focus the load against the dynamic surface. They can also be mounted opposite as a double-acting sealing system.
Features
• Not affected by structural deformations
• Long service life
• Simple execution of the seat
• Excellent wear resistance
• Good temperature resistance
• Easy to install
• Exceptional resistance to extrusion (backup ring)
| MATERIAL | ||
| 1Type | Designation | Hardness |
| Polyurethane | SEALPUR 94 | 94°ShA |
| 2Type | Designation | |
| Acetal resin | BEARITE | |
| FIELD OF APPLICATION | ||
| Pressure | Speed | Temperature |
| ≤ 500 bar | ≤ 0.5 m/s | -40°C÷ +110°C |
| SURFACE ROUGHNESS | ||
| Dynamic surface | Ra ≤ 0.3 um | Rt ≤ 2.5 um |
| Static surface | Ra ≤ 1.6 um | Rt ≤ 6.3 um |
