YWZ4‑150/B30 Explosion‑proof Drum Brake, Spring‑Applied Brake For Hazardous‑Area Crane Systems

YWZ4‑150/B30 Explosion‑proof Drum Brake

YWZ4‑150/B30 Series (Explosion‑proof) Electro‑hydraulic Drum Brake is a flame‑proof fail‑safe safety brake designed for hoisting and conveying machinery operating in explosive‑gas hazardous environments. It adopts spring‑applied and hydraulic‑release working principle. When power is cut off, high‑power compression springs push brake shoes to clamp tightly against the brake drum to achieve reliable emergency and parking braking. When energized, the supporting certified explosion‑proof electro‑hydraulic thruster outputs thrust to open brake shoes and release brake drum for normal equipment operation.

The whole brake unit is matched with qualified explosion‑proof thruster and complies with relevant explosion‑proof specifications, effectively preventing ignition risks caused by electric sparks in coal mines, chemical plants and petrochemical sites. Fitted with high‑friction wear‑resistant brake shoes, it maintains steady braking torque under heavy‑load and repeated braking cycles. Heavy‑duty cast‑steel frame provides excellent structural rigidity and impact resistance.

YWZ4‑150/B30 Series (Explosion‑proof) Electro‑hydraulic Drum Brake is a flame‑proof fail‑safe safety brake specially developed for hoisting and conveying machinery operating in explosive‑gas hazardous environments. It follows the spring‑applied and hydraulic‑release operating principle. Under power‑off conditions, high‑strength compression springs drive the brake shoes to clamp firmly against the brake drum, realizing reliable emergency braking and parking braking. When energized, the supporting certified explosion‑proof electro‑hydraulic thruster generates thrust to push the brake shoes apart and release the brake drum for normal equipment operation.

The complete brake assembly is fitted with qualified explosion‑proof electro‑hydraulic thruster and fully conforms to applicable explosion‑proof safety standards. It effectively isolates ignition risks triggered by electrical sparks, enabling safe operation in coal mines, chemical plants, petrochemical facilities and other locations with flammable and explosive gas mixtures. Equipped with high‑friction wear‑resistant brake shoes, the brake maintains stable braking torque under heavy‑load service and frequent cyclic braking. Its heavy‑duty cast‑steel frame delivers outstanding structural rigidity and impact resistance to cope with harsh on‑site industrial conditions.

Brake shoe clearance can be conveniently adjusted on‑site. Worn brake shoes can be quickly replaced without complete disassembly of the brake unit, shortening maintenance cycles and lowering equipment downtime. All hinge transmission positions are precision‑machined to ensure sensitive, smooth and consistent mechanical response during long‑term continuous running.

As an essential safety‑critical braking component, YWZ4‑150/B30 series explosion‑proof electro‑hydraulic drum brake is widely installed on overhead cranes, gantry cranes, electric hoists and belt conveyors deployed in explosive hazardous working zones.

Core Features

‑ Complete flame‑proof brake assembly equipped with certified explosion‑proof electro‑hydraulic thruster

‑ Spring‑applied, hydraulic‑release fail‑safe design, automatic braking upon power failure

‑ High‑friction wear‑resistant brake shoes, stable braking torque and extended service life

‑ Heavy‑duty cast‑steel frame, high structural rigidity for heavy‑load industrial applications

‑ Complies with explosion‑proof standards, safe for flammable and explosive‑gas hazardous areas

‑ Convenient on‑site adjustment of brake shoe clearance, fast shoe replacement, low maintenance cost

‑ Precision‑processed hinge parts for stable and sensitive mechanical action response

‑ Widely applicable for overhead cranes, gantry cranes, hoists and belt conveyors in coal mines and chemical plants

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