STA Microfilter Clear Tube (CTS) – Self-Cleaning Fine Filtration

Microfilter · Made in Germany

Need crystal-clear water for CNC spindles or glass washers, or oil that looks like new? The STA Clear Tube is a back-flushing microfilter that removes particles down to 1–3 µm (cleanliness class NAS 7/8) – fully automatically and without filter cartridges, paper or filter aids.

Combined with an STA centrifugal separator it becomes a complete system: the separator cleans the main grinding fluid, the Clear Tube polishes a stream of clean water, and the slurry from each back-flush is sent straight to the separator, where it ends up as dry, compact sludge.

STA centrifugal separator combined with Clear Tube microfilter (CTS)

Key features

  • Filtration fineness 1–3 µm (NAS 7/8)
  • High throughput from a small filter area: 3.5–5 l/min per filter element
  • No consumables and no filter aids
  • Works with oil (including water-contaminated oil), water and emulsion
  • Fully automatic, uninterrupted operation with periodic back-flushing
  • Long filter service life
  • Removes HSS, tungsten carbide and glass particles
  • Dry sludge when combined with an STA centrifugal separator

Typical applications

Clean water or coolant supply for CNC machining-centre spindles · glass washing machines · grinding of carbide and HSS tools · honing and grinding oil.

Technical data

ModelCTS-80CTS-120CTS-240CTS-360CTS-480
Filter area (m²)2.5481216
Flow rate (l/min)80120240360480

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More STA products: Centrifugal Separators · Clear Tube System · Central Systems · Coalescers