BEd80/6 is a flameproof (Exd I Mb / Exd II CT4) compact electro‑hydraulic thruster for explosive hazardous areas (coal mines, chemical plants, oil/gas). It's the explosion‑protected variant of the ED series, with a sealed cast‑aluminum flameproof enclosure for all electrical parts.
BEd: Flameproof (隔爆型) electro‑hydraulic thruster series
80: Rated thrust 800 N (≈80 kgf)
6: Rated stroke 60 mm
Explosion mark: Exd I Mb (coal mine) / Exd II CT4 (chemical, Zone 1/2); GB3836.2 compliant
2. Working Principle
Same as standard ED series, but with flameproof construction:
Power ON: Motor drives centrifugal pump, builds pressure, extends rod (800 N, 60 mm) to release brake.
Power OFF: Pressure drops, brake spring retracts rod, applies brake (fail‑safe).
Flameproof design: Contains internal sparks; prevents ignition of external explosive gas/dust.
3. Key Technical Parameters
表格
| Item | Specification |
|---|---|
| Rated Thrust | 800 N (80 kgf) |
| Rated Stroke | 60 mm |
| Motor Power | 0.37 kW (370 W) |
| Rated Voltage | 380V/660V/1140V, 50Hz, 3‑phase; 127V/220V optional |
| Explosion Class | Exd I Mb (mine) / Exd II CT4 (chemical) |
| Protection Class | IP65 (dust/water tight) |
| Insulation Class | F |
| Ambient Temp | ‑20℃ ~ +40℃ |
| Max Frequency | 900 cycles/h |
| Weight | Approx. 50 kg |
4. Core Features
Dual explosion certification: Safe for both underground coal mines (methane/dust) and chemical plants (IIA/IIB/IIC, T1–T4).
Compact & lightweight: Cast‑aluminum housing, ~50 kg, easy mounting.
High protection: IP65 + Class F insulation for harsh, wet/dusty environments.
Fail‑safe: Power loss = brake applied; critical for conveyors, hoists, cranes.
Smooth operation: Low noise, minimal wear, long service life.
5. Typical Applications
Explosive zones: Underground coal mines, chemical/petrochemical plants, oil/gas terminals.
Light‑to‑medium brakes: YWZ, YWZB, ZWZB series drum brakes (small cranes, conveyors).
Industrial valves & dampers: Gate valves, sluice gates, flow control in hazardous areas.
Port & construction machinery: Small hoists, winches, material handling equipment.
