Four-Piece Rod Seal With Active Backup Rings
Series 128: Four-Piece Rod Seal With Active Backup Rings
The 128 series is one of the most robust four-piece rod seals on the market. It consists of a profiled energizer, a polyurethane seal element and two active anti-extrusion backup rings. It is designed for double-acting cylinders in heavy-duty applications subject to severe pressure spikes coupled with high running clearance.
Installation
Benefits
Long service life under the harshest conditions
Compatible with water-based fluids (H-PU)
Optimized for high running clearance
Easy installation
Applications
The 128 series, four-piece rod seal is ideal in heavy duty sealing applications where pressure spiking can occur.
Typical applications include:
- Mining
- Heavy duty clamp cylinders
- Specialty high-pressure cylinders
- Hydraulic rams
- Various advancing and secondary cylinders
The 128 series rod seal features a robust NBR elastomer, a profiled seal ring in abrasion resistant polyurethane and two backup rings in high-strength thermoplastic.
| Material | Code |
|---|---|
| Polyurethane H-PU / NBR / POM | MP38 |
| Polyurethane H-PU / NBR / Polyamide | MP40 |
| Temperature | MP38 °C |
°F |
||
|---|---|---|---|---|
| hydraulic oil | -20…+115 | -5…+240 | ||
| water oil emulsions (HFA) | +5…+55 | +40…+130 | ||
| water-glycol fl uids (HFC) | -20…+55 | -5….+130 | ||
| water | +5…+55 | +40…+130 | ||
| Speed | 0.5 m/s (1.6 ft/sec) | |||
| Pressure | 1380 bar (20000 psi) | |||
Note:for other materials or fluids please contact our engineering department.
