ericm979
Super Member
- Joined
- Nov 25, 2016
- Messages
- 5,813
- Location
- Santa Cruz Mountains CA, Southern OR
- Tractor
- Branson 3725H Deere 5105
Regular spool valves are proportional... more or less. How proportional depends on the quality of the valve, how well it's matched to the system, and what it's driving. I got to run a good size Kubota excavator for a little bit yesterday and the electric over hydraulic proportional control valves are miles better than anything I've used on a tractor or tractor backhoe. And it does the multiple valves at once thing much better too. But it's also a lot more expensive.
Spool valves should be sized for about 25% more flow than the system they're on.
Valves down stream of the loader valve on it's power beyond do not have to have power beyond ports themselves.
Loader valves should have a power beyond to run the 3pt hitch or other valves. You can get loader valves with two sticks or a joystick. I'd recommend a joystick, and a valve with a float position for the loader. Well matched and well made loader valves should let you raise/lower the loader and curl the bucket at the same time.
Spool valves should be sized for about 25% more flow than the system they're on.
Valves down stream of the loader valve on it's power beyond do not have to have power beyond ports themselves.
Loader valves should have a power beyond to run the 3pt hitch or other valves. You can get loader valves with two sticks or a joystick. I'd recommend a joystick, and a valve with a float position for the loader. Well matched and well made loader valves should let you raise/lower the loader and curl the bucket at the same time.