Compressor Selection Maps: axial
Compressor selection maps per API 617/618/619 — operating envelopes, polytropic efficiency ranges, specific power, surge and turndown limits, molecular weight suitability, discharge temperature limits, capacity control methods, pulsation requirements, lubrication/maintenance intervals, and selection criteria for centrifugal, reciprocating, screw, scroll, diaphragm, and axial compressors
| compressor type | record id | adiabatic efficiency pct max | adiabatic efficiency pct min | adiabatic efficiency pct typical (%) | api standard | discharge pressure max psia (psia) | discharge pressure min psia (psia) | discharge temp max F (degF) | flow max acfm (ft^3/min) | flow min acfm (ft^3/min) | maintenance interval hr (hr) | molecular weight max (g/mol) | molecular weight min (g/mol) | notes | parameter category | polytropic efficiency pct max (%) | polytropic efficiency pct min (%) | polytropic efficiency pct typical (%) | pressure ratio per stage max (dimensionless) | pressure ratio per stage min (dimensionless) | size class | specific power bhp per 100cfm (hp/(100 ft^3/min)) | speed rpm max (rpm) | speed rpm min (rpm) | surge margin pct (%) | turndown pct max (%) | turndown pct min (%) | typical applications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| axial | operating_envelope | 88 | 80 | 84 | API 617 | 150 | 14.7 | 350 | 800,000 | 30,000 | 60,000 | 60 | 2 | Highest flow range; staging 6-20 rows; narrow operating range (surge to stonewall ~20-25%) requires variable stator vanes for control; molecular weight limited to near-air (MW 28-32) typical; efficiency highest of all types | operating_envelope | 92 | 85 | 88 | 1.3 | 1.05 | all | 8 | 6,000 | 1,500 | 8 | 100 | 80 | Large air separation plants, blast furnace blowers, process air compressors, LNG baseload |
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