VICKERS KCG 8 W2503ZMUHL110

For a size 8 proportional valve in the KCG series, 400 litres per minute is the rated flow capacity. Proportional valves like this one are built around continuous, electronically modulated control rather than simple switching, so they're well-suited to dynamic systems where flow demand fluctuates. That said, your actual system design, line sizing, and pump output all factor into whether you hit that ceiling in practice.

Buna-N seals give you pretty good protection against most common hydraulic fluids you'd find in an industrial setup.