DYW700-2000 Series Explosion Protected Electro-hydraulic Drum Brakes

🛠️ Product Overview: DYW700-2000 Explosion-Protected Drum Brake

The DYW series is engineered to provide reliable braking for heavy machinery where the risk of explosion due to flammable gases (like methane) or dust is present.

Model Number: DYW700-2000

Type: Explosion-Protected / Flameproof / Drum Brake

Drive Mechanism: Electro-Hydraulic (Pusher). Utilizes an electric-hydraulic thruster (pusher) to open the brake shoes.

Action: Normally Closed (Fail-Safe).

Braking: Spring-applied (Engages when power is cut).

Release: Hydraulic pressure (from the thruster) opens the brake.

Key Feature: Full Unit Certification. Unlike some models that only certify the actuator, the DYW series typically holds a "Coal Safety Mark" (MA) certificate for the entire brake assembly, not just the pusher.

📋 Key Technical Specifications

✨ Key Features

Explosion-Proof Integrity: Constructed with flameproof enclosures (Exd I) to contain any internal sparks. The entire unit, including the housing and the built-in electro-hydraulic thruster, is certified for hazardous zones.

Fail-Safe Design: It operates on a "Normally Closed" principle. If there is a power failure, the brake automatically engages via spring force, ensuring the conveyor or hoist cannot move uncontrollably.

Interchangeability: The installation dimensions and center height are designed to be compatible with standard models like YWZ5, YWZ9, and YW series brakes. This allows for easy replacement of standard brakes with explosion-proof versions without modifying the machine structure.

Robust Construction: Built to withstand the harsh conditions of underground mining, including vibration, dust, and humidity.

🏭 Typical Applications

The DYW700-2000 is primarily used in:

Coal Mines: For belt conveyors in underground shafts where methane gas and coal dust are present.

Mining Hoists: Safety braking for winding engines.

Heavy Transport: Any explosive atmosphere requiring high-torque drum braking.

💡 Operational & Maintenance Notes

Certification Validity: Always verify the current status of the MA (Mine Safety Mark) certificate for both the brake and the thruster before installation in a hazardous area.

Seal Inspection: Regularly inspect the flameproof joints and cable glands to ensure there is no damage or corrosion that could compromise the explosion-proof rating.

Lining Wear: Monitor the wear of the brake linings closely. Excessive wear can increase the brake release clearance, potentially causing the brake to drag or fail to engage properly.

Hydraulic Fluid: Ensure the electro-hydraulic pusher is filled with the correct type of hydraulic oil (e.g., DB-25) suitable for the mine's ambient temperature.

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