Tunnel 9 Pitch Upgrade
Arnold Engineering Development Complex (AEDC) Tunnel 9 in Silver Spring, MD, requires modernization of a high-performance hydraulic motion system. The Firm Fixed-Price requirement covers design, engineering, procurement, off-site fabrication, pre-assembly, on-site demolition, installation, and commissioning of core system components. All components must comply with ASME B31.1, ASME BPVC VIII, and ISO 4406 standards. Core components include a primary control valve with step response time of 55 ms or less, a main actuating cylinder with a 120.5-inch working stroke and 13 ft/s linear speed, a Hydraulic Power Unit, and a dedicated filtration and cooling “kidney” loop.