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1, the liquefied gas valve chamber should be cleaned before installation and clear the defects caused in transit; 2, liquefied gas valve installation should keep the butterfly valve shaft is horizontal, the piston valve vertically up position; 3, liquefied gas valve Before commissioning, the transmission should be debugged to keep all the functions of the transmission intact, the limit stroke and over torque protection and control reliable; 4, the lubrication parts of the liquefied gas valve transmission device should be fully lubricated before commissioning; 5, before starting the electric device , Should carefully read the instructions supplied with liquefied gas valve electric device.