Proof chain hoists generally be checked from the following aspects

Proof chain hoists can be widely applied potential fire and explosion hazard environments,wire rope hoist explosion-proof hoist products in the course of friction between the impact will not generate mechanical spark, can effectively prevent fire accidents, explosion-proof chain hoists chain hoists as ordinary to assume the load carried, but in addition it also combines proof performance, so in the procurement must be careful to distinguish, have avoided due to product quality problems caused by worries generally be checked from the following aspects:
An explosion-proof chain hoists External:
1) Check-proof chain hoists structure,chain block product specification
2) Check the appearance of the coating quality chain hoists.
3), first check whether the appearance of damaged, try to handle zippers, listening to the sound is crisp, with or without blocking other phenomena, whether wrapped chain breakage.
4), proof chain to chain pull down smoothly, you must lift freely;
5), proof chain hoists shall be provided with a hook at the slip, anti-off devices.
6), check the chain hoist hook assembly for wear and so on.
7), explosion-proof chain hoists and load-bearing chains, hooks and other parts in the national standard bearer security timer will occur under load deformation and cracking, etc.;
8), explosion-proof chain hoists lifting the ground at the time of sediment, to try to avoid sediment into the bearings,lever hoist worn rollers affect life expectancy.
Second, the proof chain hoists inside:
1), the material should be copper alloy explosion-proof material
2), proof chain hoists internal gear and the shaft is not in place by the quenching, resulting in broken teeth does not rise or fall.