Vickers RV5 10VF 8H 20/15

Harvesters are actually one of the listed applications for this valve, so you're right in the wheelhouse it was built for. It handles up to 350 bar (5000 psi) and flows 114 litres per minute through a 1/2" port, which gives it enough range for the kind of demanding cycles you'd see in mobile harvest equipment. The spool-style design keeps pressure regulation consistent, and the compact build means it fits into tighter installations where you don't have a lot of room to work with.