Rotary Vane Air Compressor 50hp, will ship, US $5,500.00 – Picture 0

Rotary Vane Air Compressor 50hp, will ship, US $5,500.00 – Picture 1

Rotary Vane Air Compressor 50hp, will ship, US $5,500.00 – Picture 2

Rotary Vane Air Compressor 50hp, Will Ship

US $5,500.00

Harwinton, Connecticut, United States
Mar 9th

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50 HP Rotary Vane Air Compressor in excellent condition. Performed excellent for our needs, we have outgrown the unit. Why are rotary vane compressors the best choice for your air compressor needs, read below. We will box for shipping at cost of materials and minimal labor. Shipping cost is the buyers responsibility A screw compressor is most efficient when it is new. The clearances are minimum, leakage is minimum and MEP (mean effective pressure) is minimum. As the compressor wears the clearances enlarge. Leakage of air to intake and to preceding pressure cells increase, which raises the MEP. The effect is to reduce the air delivery and increase the H.P. required to compress the reduced quantity of air. The vane compressor will not degrade with wear but will actually improve. As the blades seat in on the stator and rotor slots, leakage and power are reduced and the compressor stabilizes at a level 5 to 10% higher efficiency than when new. This level is maintained by the clearances being maintained at minimum throughout the life of the compressor wear. The rotors of the screw compressor are made of steel of a very easy machinable grade. This is because of the large amount of metal removal and numerous machining operations. This type of steel is prone to galling under marginal lubrication conditions. A pair of rotors that have been in service for less than 2000 hours will have gaps in the sealing lands on the O.D.’s of the lobes, and numerous scars on the flanks of the lobes. As a result of metal to metal contact during each and every start up, galling occurs that is the result of the welding that takes place between similar malleable metals without lubrication. The surface of the metal is not porous and does not retain oil for start up. The vane compressor has the rotor, stator and end covers of high quality cast irons. Cast iron is a superb bearing material because of the free carbon, hard iron carbides and porous surface which retains oil. There is no contact between these parts, only between them and the blades. If the blade is made of a material that is dissimilar and wear resistant then galling is eliminated and wear is reduced.