The Schiedrum Hydraulik 30D-6,3-4H is a 3-way sandwich precision flow control valve with a rated flow of 6.3 L/min, maximum operating pressure of 450 bar, lockable graduated adjustment knob and FKM Viton sealing for 120°C hydraulic oil, designed for precise low-speed flow regulation on grinders, hydraulic test benches and die-casting machinery.