ED121/12Ex series is a wet‑type, explosion‑protected electro‑hydraulic thruster (also known as electro‑hydraulic pusher), specially designed for driving and releasing drum brakes, wheel brakes and other mechanical actuators in hazardous environments with flammable gas, vapor or dust.
Basic Identification
Model: ED121/12Ex series
Type: Explosion‑protected electro‑hydraulic thruster
Structure: Wet, oil‑immersed, fully enclosed
Application: Actuation device for explosion‑proof braking systems
Key Parameters
Rated thrust: 1200 N
Working stroke: 120 mm
Standard power supply: Three‑phase AC 380 V, 50 Hz
Explosion‑proof rating: Ex d II CT4 / DIP A21 TA, T4
Protection class: IP65
Insulation class: F
Working Principle
When energized, the explosion‑proof submersible motor drives the impeller to generate hydraulic pressure, extending the push rod to release the brake.When de‑energized, hydraulic pressure dissipates; the return spring retracts the push rod, allowing the brake to engage automatically.The explosion‑proof enclosure ensures safe operation in hazardous areas.
Features
Special explosion‑proof design for gas and dust hazardous locations
Stable thrust, smooth action, low noise
High sealing performance, long service life
Suitable for frequent starting and heavy‑duty operation
Compatible with various explosion‑proof electro‑hydraulic drum brakes
Typical Applications
Coal mines, oil fields, chemical plants, natural gas facilities
Explosion‑proof cranes, hoists, winches and conveying machinery
Port and metallurgical equipment operating in explosive environments
