Differential area, unloading relief valves fit into size 10 cavities and are available with adjustable pressure ranges of 50 to 2000 psi and 50 to 4000 psi. They offer flow rates of 1.0 gpm at an operating pressure of 5000 psi. Uni-body design and oversized seating allow high-torque tightening during installation without need for locking mechanisms or lock wires. Command Controls Corp., (847) 429-0700, www.commandcontrols.com