2 column hydraulic press machines for suppling engineer overseas service

  The working medium used hydraulic machine's function is not only to transfer pressure, and ensure the machine parts work sensitive and reliable, long life and less leakage. Hydraulic press of the working medium basic requirements: have a proper mobility and low can be compressed and to improve the transmission efficiency; can rust; third, good lubrication performance; (4) is easy to seal; fifthly, stable performance, work for a long time without spoilage. The hydraulic machine initially water as working medium, the future use of emulsion in water and adding a small amount of emulsified oil, to increase the lubricity and reduce corrosion. In late nineteenth Century the press working medium with mineral oil. Oil has good lubricity, corrosion resistance and moderate viscosity, beneficial to improving the performance of hydraulic machine. In the second half of the 20th century the new water-based emulsion, the emulsion morphology is "water in oil", instead of the original "oil in water". The water in oil emulsion for foreign oil ", its lubricity and corrosion resistance to oil, and the oil content is very few, is not easy to burn. But the price of water-based emulsion is more expensive, which limits its popularization.