Provair Filtration
Sinterflo Filter Elements and Cylinders


  • Synthetic gas catalyst recovery
  • Silane gas filtration in silicon production
  • Process steam for pharmaceutical and other industrial uses
  • High pressure ethylene
  • Corrosive liquids
  • Solvents, ketones, esters, amines, other hydrocarbons
  • Feed water/make-up water


  • Stainless steel is ideal for long term use in particularly aggressive high temperature environments.
  • PTL’s manufacturing provides end users with the highest degree of permeability combined with tight filter performance and excellent strength characteristics.
  • Cleanable and regenerable using back-flushing, ultrasonic and other commonly used procedures over many cycles ensuring long service life.
  • Can be fabricated into single or multiple filter lengths, to retrofit existing vessels and replace less efficient filter types.
  • Isostatically pressed and vacuum sintered cylinders offer excellent uniformity of media and filtration performance.
Gas filtration


  • Nitric Acid
  • Ammonia
  • Hydrogen Peroxide
  • Sulphuric Acid
  • Urea
  • Oil Refining and Cracking
  • Caprolactam
  • Maleic Anhydride
  • HDPE Plant
  • Vacuum Drying
  • Clinical Incinerators
  • Biomass/Biogeneration
  • Catalyst Recovery
  • Hopper venting

Features and Benefits

  • Robust construction, unlike ceramics, permitting ease of mechanical handling
  • Lightweight, offering ease of installation
  • High permeability, leading to reduced pressure drop
  • Cleanable by either chemical or pulsed jet, offering longer life
  • Surface filtration rather than depth plugging
  • Temperature resistant
  • FDA approved materials
  • Non-shedding materials
  • Longer on-stream life and recyclable materials leads to minimum disposal costs
  • Minimum maintenance costs
  • Electrically conductive, offering negligible static build-up
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