All are high-specification units with Globetrotter cabs having single bunks, full leather trim, fridges and microwaves, and were supplied by Volvo Truck and Bus Centre East Anglia, in Chedburgh, Suffolk.
The firm selected the D13K500 500bhp engine mated to vbolvo's intelligent I-Shift automated transmission.
All the tractors are 3.9 m wheelbase with units and have the AdBlue tank installed at the rear of the cab to release space for the chassis-mounted hydraulic tanks.
The trucks also feature 385/80-22.5 tyres on Durabrite alloy wheels, to save weight and give an additional 15cm ground clearance.
"This extra ground clearance offers a clear advantage when going onto farms," explains Duynie transport manager Paul Storey.
"Everything about these units, from the custom-designed paintwork to the colour-coded chequer plate chassis infill, is of the highest quality and designed to show our drivers, customers and suppliers the 'Duynie way'," he continues.
"We are proud of what we have achieved ... and, with these new Volvo trucks, we are taking another significant step to support our goal of being the market leader."
All the new tractors are covered by Volvo Gold R&M contracts and, as they are stationed across Duynie's four regional depots, they will be cared for at Volvo Truck and Bus Centre East Anglia dealerpoints in Chedburgh, Peterborough and Wellingborough.
They will haul top specification 51.3m3 capacity smooth-sided sloper tipping semi-trailers from Fruehauf, featuring Edbro tipping rams, the Fruehauf weighing system with chassis mounted display, Fruehauf remote electric Power-ova sheeting system and air locking tailgates, with rack and pinion grain hatches.