InfraStructures - November 2013 - Two-Speed Air Compressor Decreases Noise and Idling

Two-Speed Air Compressor Decreases Noise and Idling

VMAC's RAPTAIR-MF Diesel Drive Stand-Alone air compressor is now two-speed equipped.

After feedback from clients suggesting a quieter RAPTAIR-MF could be beneficial to them in bidding on construction projects for utilities and in public works, VMAC responded by adding an idle-down feature to the system. The system now features 2 rpm speeds; low speed is 2,600 rpm and high speed is 3,600 rpm.

The low speed is quieter, burns less fuel and provides low engine speed at startup, providing added protection for the unit. The higher speed delivers more power when it is required to a maximum of 1275 l/min (45 CFM). The welder, generator and PTO port do not run at the lower speed, so when those options are chosen, the unit runs at the higher rpm.

No action is required from workers utilizing both speeds. When the air compressor function is chosen, the system simply responds with the appropriate amount of CFM to run the tool. If more CFM is required, the engine will kick up to the higher rpm. This greatly reduces job site noise which, in addition to protecting workers, also reduces nuisance complaints when work is being done near businesses, schools, houses or other places that people may be disturbed.

The lower idling speed also protects the system at startup as it idles at low speed for five seconds before idling up. When the weather is cold, the low-speed idle lasts until the system is ready.

All other features of VMAC's popular RAPTAIR-MF unit remain the same. The PTO, welder, generator, battery booster and battery charger all meet the same specifications as before. The unit is 265 kg wet and its Kubota diesel engine is Kubota-certified.

Source: VMAC

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