VICKERS RV8-8-S-0-15/2

These Vickers pressure control valves are reliable, economical, and compact, so they're good for mobile and industrial applications, including use in harvesters and refuse haulers.

At 350 bar (5000 psi), that rating covers what this valve is built to handle in exactly the kind of mobile equipment you're describing. Harvesters are one of the named applications for the RV8-8 series, so it's not a stretch to say it was put through its paces with that use case in mind. The poppet-style design also tends to hold a cleaner seal under pressure than spool-type valves, which helps when you're dealing with repeated pressure spikes under load.