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The reasons of sandblasting gun does not work

What is the reason that sandblasting gun does not Spray sand only air come out 
 
1) Check whether the sand control valve of the sand blasting pipe of the nozzle is blocked
 
2) Check whether the abrasive is damp
 
3) Check whether the horsepower of the air compressor matches the air pressure required by the sand gun

 
 

Promulgator: ：admin　 Send date：2021-06-07 10:03