Air dryer 
 Range of features: for compressed air purification dry 
 The common specifications are: 
 1HP 3HP 5HP, etc. 
 Air dryer works: 
 Heating the material in the wet points (generally refers to water or other volatile liquid ingredients) vaporization escape in order to obtain the specified moisture content of solid materials, machinery and equipment. 
 Air dryer routine maintenance knowledge 
 Cleaning of the air dryer, air condenser, crushed air condenser fin surfaces should be avoided 
 Wind around the condenser to ensure enough space for ventilation and heat dissipation, can not work under direct sunlight; regularly use compressed air to clear the surface area of ??ash, cleaning with compressed air flow, the pressure is not too large. Air-cooled dryer, water-cooled dryer maintenance knowledge 
 (A) each class observation and recording instrument value four times 
 1, the compressed air pressure difference does not exceed 0.035Mpa; 
 2, the evaporation pressure gauge 0.4Mpa-0.5Mpa; 
 3, the pressure gauge 1.2Mpa-1.6Mpa. 
 Cold and dry should always observe the drainage, sewerage system 
 A float drain cleaned once a week or so; 
 2, outfall sewage per week. 
 ◆ Electronic drainage cleaning methods: 
 (a) the front of the automatic drainage valve closed; 
 (b) Loosen the top nut out timing coil, the coil cleaning process can never come into contact with water, otherwise the coil will burn; 
 (c) pulled out the hose, loosen the drainage valve body, the drainage within the compressed air vent; 
 (d) Remove the spool to wipe clean; 
 (e) of the body twist back, front-end ball valve gently open with compressed air, impurities, water, oil drainage system emptying; wipe with a rag body; 
 (f) the spool, the timing coil in situ Replace; fitted hose, open the front-end ball valve. 
 (C) frequently observed in the inlet temperature of cooling water systems, compressed air system 
 1, cooling water temperature is 32 ℃; 
 2, the water pressure 0.15 ~ 0.3Mpa; 
 3, the compressed air intake temperature should generally be ≤ 45 ° C (not hot hands deep into the trachea is appropriate), except for special. 
 4, the cooling water should be kept clean half of the Y-type filter cleaning time, water quality once a month; water condenser cleaning every year once (depending on water quality), air condenser be cleaned once a month; 
 ◆ shell and tube type water condenser cleaning: Turn off the cooling water inlet, open pipe end cap is not connected, the external end cap and gasket just use water to clean; brass internal gas, water or even stick cleaning wipes ; cleaning should pay attention to not be too much force, so as not to break the internal brass. 
 (D) frequently observed in the cooling system 
 1, the compressor of the freeze-drying machine at least a day to touch again, normal cold, frost; 
 Each week of the dry filter touch both sides of the temperature difference should not be a large temperature difference (imports of hot and cold exports need to be replaced); 
 3, the compressor there is abnormal sound and heat as soon as possible contact with the after-sales service. 
 (E) Check the electrical control system: Purge dust, tighten the terminal (must be in the uncharged) 
 (F) maintenance of the appearance of 
 Erase the device surface oil, dust with a clean towel on a regular basis. Clear installation of cold and dry, air compressor ground dust and oil, to keep the environment clean and tidy.