In line high pressure filters for hydraulic and lubrication systems; filter head in cast iron and filter bowl in steel; max. nominal flow 1.135 l/min; max. operating pressure 420 bar; ports from 1/2" up to 1"1/2 BSP or SAE flanged (6000 psi); bypass, reverse flow, non-return or multi-function valve; visual, electrical or visual-electrical differential pressure indicator