Recip count

—

Cylinders per

—

Hours since packing replace

Replace cost

$/cyl

Centrifugal count

—

Seal type

Operating hours/yr

hr/yr

Gas CH₄

Gas price

$/mscf

GWP CH₄

—

Reciprocating rod-packing leakage and centrifugal compressor seal vents: EPA Subpart W §98.233 emission factors and replacement economics.

EPA emission factors: recip 11.5 scf/hr/cyl (aged), centrifugal 24.97 (wet) / 1.55 (dry) scf/min.
EPA OOOOa requires rod-packing replacement every 26,000 hours or 36 months.
Wet→dry seal conversion CAPEX typically $300-500k per centrifugal compressor.
For Subpart W reporting: prefer measured vent rates over default factors.

Compressor Rod-Packing & Seal Vent

Vent Emissions