Here's the data sheet for the hydraulic valve (or very close to it, the actual valve has 2 coils for 3 way, center off, operation). http://www.sterling-hydraulics.com/f...df/JP04C31.pdf
The voltage for each coil is 24 VDC at 14W-18W so I've been trying to make a 1A chip, IRL530 work to provide proportional control.

It doesn't come with electronics, just the coils. My understanding is it operates A0-24V B0-24V where the coil energized affects direction and voltage affects rate of flow.