Superior drum spray system to maintain maximum productivity – Variable waterflow control to conserve water – Independent primary and secondary spray systems (each with separate water pumps, water filters, distribution lines, and spray bars with hand- serviceable nozzles) – Water tank level LED indicators. Performance Features - Dual frequency vibration systems of 41,7 / 30,8 Hz (2,500 / 1,850 vpm) on the DD90 and 63,3 / 47,5 Hz (3,800 / 2,850 vpm) on the DD90HF match machine performance to production requirements - Eight amplitude settings achieve required compaction throughout deep lifts and/or stiffer mix designs - Five-position rotating operator’s sta- tion with an adjustable seat provides a smooth ride and comfortable operating environment - Two complete, independent water systems include triple water filtration, four water pumps, four spray bars, and variable waterflow - Eccentric rotation automatically matches direction of travel, improving smoothness - Patented Impact Spacing Meter provides a visual reference for speed control to maintain proper impact spacing, resulting in consistent smoothness - Exclusive machined drums with chamfered, radiused drum edges minimize drum edge marking and facilitate finish rolling Standard Features And with operating weights of nearly 9,8 tonnes (11 tons), the DD90 and DD90HF compactors meet most agency static weight requirements. The DD90HF, with a frequency of 63,3 Hz (3,800 vpm), has a nominal capacity up to 290 tonnes (325 tons) of HMA per hour. The DD90 has a frequency of 41,7 Hz (2,500 vpm) and a nominal capacity of up to 227 tonnes (250 tons) of HMA per hour. 
2 what you need to get the job done right The Volvo DD90 and DD90HF vibratory asphalt compactors have 1 675 mm (66") drums and provide high performance for highway and other large paving projects.
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