Documents that keep a site claim honest
What drawing is enough?
A plan view with doorway widths, the dump sink, and the charger location. Dimensions in inches or millimeters, with the unit written once. A photo of the aisle helps, but it does not replace the numbers.
Which datasheet revision counts?
The revision that matches the configuration code on the quotation. If the supplier sends a newer sheet, the differences in path, tank, or voltage are specification deviations and need a written accept or reject.
How should certificates be read?
Look for the model, the standard, the issuer, and the expiry or issue date. ISO 9001 describes a quality system at a stated scope. UL or ETL, when offered, describes a product safety file for listed models. Neither document is a credential of this sourcing desk.
What does acceptance include?
Incoming checks for path, tank volumes, charger, and included blades, plus the commissioning tasks named in the quotation. A factory acceptance test is optional and must be scoped. Silence means it was not bought.
Where do the three buying arguments show up?
Lowest equipment price versus comparable lifecycle scope: pads, freight, and commissioning can erase a cheap deck. Standard configuration versus an application-specific deck: a stock path is simpler until the doorway rejects it. Headline rating versus test basis: gallons per hour or dBA without method cannot be ranked. Record which side the buyer is taking before factories answer.