| Feature | YJGQ-20 (This - Compact) |
ZYTJX-250 (Heavy Rail Clamp) |
YFX-400/80 (Storm Wedge) |
|---|---|---|---|
| Clamping force / unit | 20 kN | 60–120 kN | ~32 kN (wedge) |
| Size / weight | Compact, light | Large, heavy | Medium |
| Drive | Hydraulic (external pack / hand pump) | Hydraulic (central) | Electro-hydraulic thruster |
| Onboard motor | None | None | Yes (Ed thruster) |
| Resists | Wind + grade + impact | Wind + grade + impact | Wind push only |
| Long-term parking | Yes, zero-energy | Yes, zero-energy | Yes, but wedge wear concern |
| PLC interlock | Optional | Optional | Optional |
| Best for | Light-duty, narrow frame, tunnels, Ex, budget | Heavy gantry leg, typhoon zone | Outdoor rail crane storm anchor |
Options & Accessories
Limit switches - "jaw clamped" / "jaw released" feedback for PLC travel-motor interlock
Manual hand pump - local emergency release when hydraulic power pack is unavailable
Electro-hydraulic solenoid valve - Ex d flameproof option for hazardous areas
Corrosion-resistant coating - epoxy + zinc for coastal / underground damp sites
Low-temperature seal kit - for -40°C operation
Left / right handed pairs - symmetrical mounting on both rails
Jaw liner sets - wearable inserts, replaceable without dismantling the clamp body
