Oil free screw compressor - Shanghai Purdue Compressor Co., Ltd

Screw compressor without oil-water lubrication	Oil-free piston compressor	Oil-free scroll compressor	Oil free dry screw compressor
The compressed air is cleaned by drinking water, and even the oil suspended particles and bacteria hidden in the inhaled air will coagulate with water, and finally separated from the compressed air, and then isolated by the water filter system, bringing you almost pure and high-quality air.	Long time operation will increase the temperature load of the compressor, and Teflon seal ring on the piston will cause premature wear, which is very likely to be damaged earlier. Teflon, a high carcinogen, will enter the compressed air.	Long time operation will increase the temperature load of the compressor, and the Teflon coating in the scroll machine will cause premature wear.	The coated rotor is scoured by the air flow to produce a source of particles, such as molybdenum or polytetrafluoroethylene, and the peeled particles will enter the compressed air and finally enter the compressed air network of the end user.

Screw compressor without oil-water lubrication	Oil-free piston compressor	Oil-free scroll compressor	Oil free dry screw compressor
The compressor unit is lubricated by water, and the sealing system and cooling system do not need any oil at all. This is the real oil-free compressor in the world at present.	The compressed gas is basically pure and free of oil stain. However, due to the incomplete oil scraping and poor sealing of the oil scraper ring, oil often runs to the packing device or even the piston ring, resulting in oil in the compressed gas. In addition, the exhaust temperature is high, and the cooler is blocked, so that the cooling effect is not good. The piston ring is stained with oil and easy to wear.	The sealing and lubrication problems of oil-free scroll compressor have always been the key factors affecting its efficiency. Because there is no sealing function of lubricating oil, the leakage problem of oil-free scroll compressor in the working process is more serious.	The gearbox of oil-free dry screw compressor still needs lubricating oil, which is expensive to replace. The waste oil generated by oil change is not environmentally friendly, and the oil seal is damaged and not replaced in time. The lubricating oil or oil mist is initially sucked into the compression chamber at any time and mixed into the compressed air.

Screw compressor without oil-water lubrication	Oil-free piston compressor	Oil-free scroll compressor	Oil free dry screw compressor
The equipment operation cost is low, and there is no need to replace lubricating oil, oil separation core, oil filter, precision filter and other components regularly like the oil air compressor. Water lubricated air compressor only needs less spare parts (water softener, air filter element and water filter)	The structure of oil-free piston compressor is complex and heavy, with many vulnerable parts, large floor area, high investment, large maintenance workload and short service cycle, so the daily maintenance cost is relatively high.	The surface of moving parts of oil-free scroll compressor is mostly curved, and the machining and inspection of these curved surfaces are complex. Some of them also need special equipment, and the sealing requirements are high, and the sealing structure is complex, so the maintenance cost is high.	In order to ensure the compressor efficiency, the oil-free dry screw compressor must work under the harsh conditions of high speed and high temperature, resulting in serious wear and deformation of components, frequent failures and high maintenance and repair costs.