Seal Gas Filtration | John Crane Filtration Systems
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Seal Gas Filtration

Optimized Seal Gas Filtration for API 692

Specially designed Indufil® filters remove liquid and particle contamination and maximize reliable dry gas seal operation.  FCF Series Seal Gas Filtration Systems are available in single and duplex configuration, in stainless steel as a standard and in higher alloys. The filters comply with international pressure vessel and design codes and were designed in alignment with API614 and designed for API692.


In addition to complying with filtration requirements for contaminants of 1 micron and smaller at particulate efficiencies of 99.9%, coalescing performance is down to 0.005 ppm (w), all within a smaller footprint. 

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  • California Residents: PROPOSITION 65 WARNING
  • Coalescing and particle filtration element options
  • Filter contaminants of 1 micron and smaller at particulate efficiencies of 99.9%
  • Coalescing performance down to 0.005 ppm (w)
  • Reduced system footprint up to 40% 
  • Interlinked transfer valves with bolted construction and providing a safe and zero-leak operation both to atmosphere and between the pressure vessels
  • Both transfer valve (Class A) and needle valve (Class B) compliant to ISO 15848 (Fugitive Emission)
  • Bolted cover construction allowing an easy and clean filter element change out


Higher-grade Materials

316/L Stainless Steel

Pressure Limits

5990 psi(g)/413 bar(g)

Temperature Limits

-94°F to 482°F/-70°C to 250°C

Certified to

ASME VIII Div. 1/PED/ATEX Ex II 2G/API 692 and API614
Optional: U-stamp, TR-CU, ML, Dosh, NR13, ARH, AS1210, CRN, etc

Filter Efficiency

Removal of liquids from gas down to 0.005 ppm (w)

Maximum Flow Rate

Sizing in accordance with API614, API 692 or alternatively based on maximum gas coalescing velocity

Recommended Applications

  • Centrifugal compressors

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