Air Products 540K N2 Pumper — 500,000 scfh Nitrogen Pumping Trailer

What flow and head is this rated for, and at what NPSH?

This unit is rated for 500,000 scfh capacity at 10,000 PSIG. The trailer is missing pumps, so no pump-specific performance data such as head or NPSH is available. You'll need to ask the seller what pump configuration was originally installed and whether any pump documentation or nameplates remain with the unit.

What should I inspect on a used pump before buying?

Since this trailer has no pumps installed, focus your inspection on the 2,000-gallon cryogenic storage tank for vacuum integrity, inner vessel condition, and any signs of previous damage or repair. Check all structural components, valving, instrumentation, road-worthiness of the trailer frame and axles, and verify what additional equipment beyond pumps is needed to make this unit operational. Nitrogen pumping trailers typically require complete system integration including controls, so assess the completeness of all ancillary systems.