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 Between levels are set in order to reduce the compressor power consumption and to ensure reliable operation of the compressor, the intercooler. In the middle of the cooler, convective heat transfer from the cooling water gas cooling. If the intercooler leak, the gas channel and the cooling water channel connected the direction of the leakage, as the pressure of the gas and cooling water. 
 The first stage air compressor behind the intercooler, cooling water pressure is usually higher than the gas pressure. Therefore, if the first stage intercooler leak, cooling water into the gas side, the gas will be entrained water, so that the first oil-water separator blowing water significantly increased. 
 Air compressor of the second level and the intercooler at all levels, cooling water pressure is usually lower than the pressure of the gas. Therefore, if the leak, the gas will leak to the cooling water. So that the cooling water collection trough will find a large number of bubbles overflow. According to the above two phenomena can be made the judgment of the intercooler leak. 
 ? To ensure that the unit normal operation and long life, good maintenance is the key. Therefore, we must carefully perform the maintenance procedures of the screw compressor. Before proceed with the maintenance, at least the following preparations: 
 1.1 Disconnect the system off and hang up signs at the power switch. 
 1.2 Close the stop valve to the gas supply system to prevent the compressed air to flow back into the part of the overhaul. Never rely on one-way valve to isolate the gas supply system. 
 1.3 Open the manual vent valve, the pressure inside the emptying system, keep the vent valve is turned on. 
 1.4 for water-cooled machine, you must turn off the water supply system, the release of the pressure of the water pipeline. 
 1.5 Ensure that the compressor has cooled to prevent burns, burns. 
 1.6 Wipe the surface oil marks, water stains, prevent the slide. 
 "Warning" 
 - Do not think that machine downtime, and that it could carry out repair, maintenance work, the machine's automatic control system at any time to start the compressor. 
 - Poor maintenance not only affect the unit's normal operation, but also may affect the safety of operating personnel. 
 - The compressor is running or with pressure, do not remove the nut, oil plug and other parts. 
 - Do not use the probability of solvents such as gasoline or kerosene, clean the air filter or other components. Operating costs should follow the instructions to use safety solvent economy 
 0-100% of the displacement steplessly. Gas consumption is reduced, the displacement decreases, followed by the motor current is also reduced; without gas, air compressor empty running empty for a long time auto stop; recovery of heavy vehicles when gas consumption to increase. Energy-saving effect is optimal.