Gas turbine inlet filtration
The goal is to sustain compressor output during dust storms, fog, salt, humidity and seasonal loading.
Inlet air filtration cascade
- 01Moisture
Hoods, louvres, coalescers or a hydrophobic prefilter stage separate rain and fog.
- 02Prefilter
A panel or pocket filter captures coarse dust and extends final-stage life.
- 03Final stage
V-cell, cylindrical or conical elements deliver the required efficiency.
- 04Monitoring
Stage ΔP, output, compressor washing, corrosion and fouling trends set the replacement timing.
System comparison
- Conditions
- Moderate or seasonal dust
- Advantage
- Simple, no pulse system
- Main risk
- Fast ΔP rise in storms or wetting
If turbine output drops
- 01Probable cause
High inlet ΔP, salt or dust, wetting, compressor fouling.
- 02Check first
Stage ΔP, sealing, drainage, output, washing history.
- 03Action
Remove bypass or moisture, revise the cascade and the replacement schedule.
Frequently asked questions
When does a gas turbine need pulse-jet filtration?
For high dust, storms and cleaning without shutdown. Consider climate, particle distribution, humidity, compressed air, efficiency and allowable inlet ΔP.
How should G4, F7, F9 and ISO ePM1 be compared?
Identify the standard first. G/F are legacy EN 779 grades; ISO ePM belongs to ISO 16890. There is no exact universal conversion: compare test reports at equal airflow and ΔP.
Cascade elements in 3D
Related pages
Static, pulse-cleaned and hybrid inlet systems for gas turbines: prefilters, coalescers, V-cell cassettes and cartridges — protecting the compressor from dust, moisture and salt aerosol.
Open →Air filter classesWhy legacy grades cannot be mechanically converted to new ones and what a test report must show.
Open →Natural gas filtration stagesStages for particles, condensate and oil aerosols upstream of pressure reduction stations, burners, compressors and turbines.
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