Site utilities & auxiliary power
Auxiliary equipment often combines several independent machines on one skid or trailer. The engine, generator alternator, compressor element, pump and lighting array need separate identities. A package rating is useful context, but it cannot identify every internal component or prove that a replacement matches the electrical, air or fluid service required at the site.
Preserve each rating and its conditions
STAMFORD's selector separates alternator power requirements from phase, frequency, speed, voltage, temperature-rise and bearing choices [UTIL-GEN]. Atlas Copco distinguishes pressure from delivered airflow and requires the stated flow-measurement basis [UTIL-AIR]. Xylem explains centrifugal pump curves at a defined speed and impeller diameter [UTIL-PUMP]. Together these examples show why kVA, air-volume figures and pump connection size cannot be treated as interchangeable measures of package capability.
Map the component boundaries on the actual package
HeavyEQ interpretation: record the package tag and each installed component tag, then identify the coupling/control interfaces between them. For a generator, separate prime mover, alternator, controller and protection arrangement. For a compressor, separate element, air treatment and receiver; for a pump, retain pump-end and drive identity. For a light tower, identify the lighting array, mast and electrical/control components independently. Record retrofits rather than assuming that the package brochure describes every currently fitted device.
Ask for relevant condition and test evidence
A used package should include removal/storage history, observations of corrosion, damaged terminals/hoses, altered guards or missing controls, and the exact scope of any professional test. A generator load report, compressor delivery test and pump performance assessment answer different questions. Keep test method, conditions and tested identity with the result. The building-water context of the cited pump white paper does not establish suitability for abrasive, dirty or chemically different site water; that application requires its own material and performance evidence.
Make unresolved duty requirements visible
Record the actual electrical load/duty, air demand at required pressure or fluid flow/head requirement as sourced project information, without filling blanks from motor horsepower. Ratings must retain units, ambient/reference conditions and configuration. No capacity, wiring diagram, pressure setting or pump operating point is supplied here. Electrical protection, grounding, pressure-vessel work, mast handling and commissioning require qualified assessment and applicable manufacturer instructions. The identification worksheet supports a defensible request; it is not permission to reconnect, uprate or operate an undocumented auxiliary assembly.
Specification evidence record
Published values retain their exact reference scope. Empty fields mean the value has not been established; they never mean zero. General model associations do not establish installed or serial-specific fitment.
| Property | Value / status | Scope and interpretation |
|---|---|---|
| Package and installed component tags | Not yet documented | Record engine, alternator, compressor/pump end, lighting and controller independently. |
| Alternator rating/configuration | Not yet documented | Retain duty, winding/bearing and temperature-rise basis from exact source. |
| Compressed-air delivery basis | Not yet documented | Keep FAD/SCFM/ACFM, measurement conditions and pressure together. |
| Pump curve identity/operating basis | Not yet documented | Require actual curve, medium and configuration; no guessed duty point. |
| Lighting/mast/control arrangement | Not yet documented | Do not transfer electrical or lifting ratings between package variants. |
| Attributed test and condition record | Not yet documented | Identify tested component, method and scope rather than a general running claim. |
Unresolved technical and source questions (2)
- No generator capacity, electrical protection setting, compressor pressure/flow, pump duty point or light-tower rating established.
- Source families do not establish installed configuration or cross-package interchange.
Research sources and scope
- STAMFORD | AvK Product Selector ↗ · first party technical web · checked 2026-10-15
Requirement inputs and available technical documentation, retrieved lines3–25
ORIGINAL_COMMENTARY_AND_SELECTED_FACTS_ONLY_NO_TABLES_OR_MEDIA
- Atlas Copco Canada: Choosing CFM and PSI ratings ↗ · first party technical web · checked 2026-10-15
Flow basis and sizing checklist, retrieved lines237–281
ORIGINAL_COMMENTARY_AND_SELECTED_FACTS_ONLY_NO_TABLES_OR_MEDIA
- Xylem How to read a pump performance curve,Part1,August2015 ↗ · first party technical white paper pdf · checked 2026-10-15
Page1: curve-specific speed/impeller basis, retrieved lines10–18 and51–55
ORIGINAL_COMMENTARY_AND_SELECTED_FACTS_ONLY_NO_TABLES_OR_MEDIA
Original HeavyEQ analysis and selected source facts. No catalogue reproduction licence, manufacturer endorsement or machine-specific compatibility is implied.