Explosion-proof manual hoist (also known as explosion-proof chain hoist or explosion-proof inverted chain) is a kind of manual lifting tool specially designed in flammable and explosive environments. Its core value is that through special non-spark materials, the risk of explosion caused by sparks generated by ordinary metal tools during friction or impact is fundamentally eliminated. 

The following is its key information：

· Core material: Key components (such as rotating gears and chains) are made of copper-based alloys such as aluminum bronze and beryllium bronze; the shell is mostly H62 copper alloy. These materials have good toughness and are not easy to generate sparks. ·Working principle: pure manual operation. The internal gear system is driven by the traction handle chain chain, which drives the lifting sprocket and the lifting chain, so as to smoothly lift or lower heavy objects. · Applicable environment: It is widely used in petroleum, petrochemical, chemical, military, mining, oil stations, pharmaceutical, paint workshops and other hazardous areas where combustible gases or dust exist. · Specifications: The common lifting weight is generally 0.5 tons to 20 tons, and different lifting heights can be selected according to demand.