In contracting and road construction, heavy machinery must be operated with great precision in all kinds of conditions. Vulnerable objects are plentiful on and around the construction site. Such as surrounding buildings, infrastructure, moving heavy construction equipment, not to mention the workers themselves. Complete safety, security and precision is therefore required. In the meantime, sand, dust and construction debris cause a heavy attack on the hydraulic equipment. For this reason, AMCA proportional hydraulic control valves are widely used in construction. The products are used in horizontal and vertical drilling machines, cranes, excavators, asphalt pavers and more.