RATO Heat Exchangers Factory was established in 1998,and initally produced the traditional shell and tubes hydraulic oil cooler. Donghua focused on hydraulic system&＃039;s heat dissipating work.We keep improving the quality and do numouros R&D to find a more optimizing design for oil cooler. In year 2001,Donghua met a turning point owe to a new patented water-cooled oil cooler-YL series. YL series oil cooler is the magistral product in our factory. By the inventory design,It is widely used on all kinds of hydraulic systems,like plastic molding injection machine,die-casting machines,hydraulic press,ect. We do full items inspections to every product before shipping out,ensuring 100% quality passed for each cooler you received.We have the capacity of delivery 2000pieces monthly,but we are readily to accept the order of even only 1 piece.We gain good prestigous from domestic customers and and now also extending the market to the world.We welcome cooperations from worldwide.We have a team of knowlegable stuff to assistant your Your inquiry will be responsed within 24 hours.