Henan Dongchen Century Puriflcation Technology Co.,Ltd: High-temperature dust remover, methanol paraffin remover, natural gas coalescence separator, coalescence separation filter element, chemical solven filter, sintering metal filter element, dry gas seal filter element, ultrafilter, mass flow security filter, industrial water filter element, nitrogen filter, raw coke oven gas filter, blade separator, barren and rich liquor filter, refining and chemical filter, sea water desalination filter.