Shield Tunneling Machine
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This page explains how Tail Skin Seal is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A critical sealing component located at the rear of a shield tunneling machine's shield shell that prevents groundwater and soil from entering the tunnel during excavation.
Technical details and manufacturing context for Tail Skin Seal
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Sealing Gap | 5–15 mm | Larger gap reduces sealing effectiveness |
| Tensile Strength | 15–20 MPa | Minimum for durabilityGB/T 528 |
| Hardness | 60–70 Shore A | Balance between flexibility and wearGB/T 531.1 |
| Operating Temperature | -20–80 °C | Outside range may cause hardening or softening |
| Abrasion Resistance | ≤0.15 cm³/1.61 km | Lower value indicates better wear resistanceGB/T 1689 |
| Tear Resistance | ≥30 kN/m | Prevents tear propagationGB/T 529 |
| Elongation at Break | ≥400 % | Ensures flexibility during installationGB/T 528 |
| Density | 1.2–1.4 g/cm³ | Affects weight and material costGB/T 533 |
| Weight | 50–150 kg | Depends on shield diameter and segment width |
| Service Life | 5000–10000 h | Under normal operating conditions |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Tail Skin Seal.
This component is essential for the following industrial systems and equipment:
| pressure: | 0-6 bar (max 8 bar transient) |
| other spec: | Slurry concentration: up to 60% solids by weight, Flow rate: 0-500 m³/h, Shield diameter: 2-15m |
| temperature: | -10°C to +80°C |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
Manufacturer profiles associated with Tail Skin Seal.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.
The Tail Skin Seal prevents groundwater and soil from entering the tunnel during shield tunneling. It creates a watertight and airtight barrier between the moving shield and the stationary tunnel lining segments, maintaining pressure balance and protecting the construction environment.
Materials on file include high-strength steel wire, synthetic polymer fibers (e.g., nylon, polypropylene), and grease-resistant elastomers. The specific materials used may vary by model and manufacturer.
Key parameters include operating pressure (1.0–1.6 MPa), sealing gap (5–15 mm), tensile strength (15–20 MPa), hardness (60–70 Shore A), operating temperature (-20–80 °C), abrasion resistance (≤0.15 cm³/1.61 km), tear resistance (≥30 kN/m), elongation at break (≥400%), density (1.2–1.4 g/cm³), weight (50–150 kg), and service life (5000–10000 h). These are reference ranges; verify with the manufacturer.
Maintenance involves monitoring grease pressure and brush wear. Regular inspection for water ingress or pressure loss is recommended. If the outer row fails, inner rows provide backup, but timely replacement is necessary to ensure sealing effectiveness.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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