Sullair 900XHH/1150XH High Pressure Tier 3 family rotary screw portable air compressor delivers 900 to 1150 cfm. Unit is designed for reliability and total accessibility. Powered by a Tier 3 emissions compliant Caterpillar engine. Mounting options are tri-axle, four-wheel steerable and less running gear.. The compressors features a pneumatic inlet valve and 0 to 100% capacity control.