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Compressors (rod packing / wet seals)

Compressor Calculator

Per-compressor vent or leak rate from rod packing or seals, converted to pollutant mass.

Input assumptions

Activity data
count
lb/lb-mol

From a representative gas analysis.

%

Weight percent of the selected pollutant (e.g. VOC, CH4) in the gas.

scf/lb-mol

Use the value for the standard temperature and pressure your program or method specifies.

hr/yr

8,760 hr/yr for potential to emit unless an enforceable limit applies.

%

Only claim control you can document and enforce.

Emission factor

Use a measured vent rate, a manufacturer value, or a rate from the reporting protocol or rule you follow. Cite the source and the unit basis (per compressor, per cylinder, or per seal).

scf/hr/unit

Calculation result

Enter number of units, gas molecular weight, pollutant weight fraction, … to see results, or fill demo values to explore.

Calculation methodology

Count-times-rate method. Multiplies the number of compressors (or packing cylinders / seals, matching your rate basis) by a per-unit vent rate, then converts the gas volume to pollutant mass.

E (lb/hr) = N × R (scf/hr/unit) ÷ MV × MW × w
Emission factor
Vent / leak rate: — scf/hr/unit
Source / reference
Not provided. Results without a cited factor are not defensible.

Calculation set

Add several sources or pollutants and total them. Stored in this browser tab only until accounts launch.

No calculations added yet.

Native Excel and PDF exports with full methodology arrive with saved accounts. Phase 2

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