National Vacuum Equipment designs the Challenger series around one problem: heat. Faster RPM, higher ambient temperature and longer run time all put more of it into the blower. The 4307 answers with ballast air injection and oil-free tri-lobe construction.
- Model: Challenger 4307
- Air flow: 560 CFM free air
- Power requirement: 36.4 HP required at 27 in. HG
- Drive: gearbox drive
- Mounting: frame mount
- Supplied with a high shaft and an enclosure
- Tri-lobe design, oil-free operation
- Ballast air injection cooling for extended run times
- Maximum pressure: 15 psi
- Recommended operating speed: 4000 RPM (4500 RPM is intermittent use only)
- Keep exhaust gas temperature below 380°F
- Designed, built and supported in the USA




