Overview
The Safe Duck Box Type DSL (Drum Style Limit) System is an essential crane safety and control device designed to protect equipment and operators by accurately controlling the upper and lower travel limits of hoists and cranes. This system ensures safe load handling and prevents mechanical overload, collisions, and operational accidents. Its robust box-type design makes it highly reliable for industrial applications in EOT cranes, gantry cranes, and overhead hoists.

Key Features
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Enhanced Safety: Prevents over-travel, overload, and potential accidents.
- Precise Travel Control: Accurately limits crane or hoist movement.
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Durable Box Design: Protects internal components from environmental damage.
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Reliable Electrical Contacts: Ensures consistent and safe operation.
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Low Maintenance: Simple mechanical design for long-lasting performance.
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How It Works
The Safe Duck Box Type DSL System operates using a mechanical drum and lever assembly:
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The drum rotates as the crane hook or hoist moves.
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The rotation engages an internal mechanism that triggers electrical contacts when a pre-set upper or lower limit is reached.
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When the contact is activated, it automatically cuts power to the motor, stopping the crane or hoist movement.
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This ensures the load does not exceed safe operating limits, protecting the crane, load, and operator.
The box-type enclosure protects internal components from dust, moisture, and industrial wear, enhancing durability and safety.