Is there a reference with a comparison chart of standard valve sizes?
Like hole configurations and port sizes for D03, D05, D08 etc.
Thanks

I hope Josh Cosford comes out and help with this... he is good at cartridge valves.

IMO(I am not aware if there is any), competition "might" prevent this from happening. Each and every brand may have different configuration but may follow a standard Area or percentage of area ratios for market/production purposes.

Try This:

valve_specs.pdf (250 KB, 42 downloads)

Ohhh, I thought it was cartridge valves, sorry Doug and Josh...

Thanks Doug, that PDF is perfect.