NSH LV oil filtering series are suitable especially for purifying and restoring hydraulic oil, machine oil, coolant oil and various other lubrication oil. The most breakdown of machinery which has lubrication oil system results from contaminated lubrication in which has water, gas, impurities etc. LV series oil recycling can rapidly remove water, gas, particulate matters and impurities from lubrication oil and improve properties of lubricating oil so as to greatly extend lifetime of machinery which has lubrication system.