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The pump is gear 0.6 cubic inch per revolution or 2.1 gal per minute at 2800 RPM the block between the pump and motor has an internal relief valve factory set at 4000 PSIOriginally Posted by metric_taper
The bank valve is a spool valve with relief sat to 3000 PSI by changing out a single plug it can be used as power beyond with other valves. I have several dozen 4 way poppet solenoid valves with 12 vdc coils but I didn't have a suitable body to mount some of them in and no good way to create a cavity cutter or a burnishing tool Ideally this would have been the preferred way to have built it as everything would have been more clean and compact. If I had the cavity cutters I could have made a mono block containing all passages and mounted the pump and motor directly to it. As it is this spool valve set up is way oversized but I'm not going to worry about it.
the motor on the plate roll is a Parker wheel motor 2.5 cubic inches @ 2750 PSi it has 832 in.lb. torque @ 1 gallon per minute The minimum flow for it is 1/2 gallon per min. the max is 11 gallon per minute max torque @ max flow would be 838 in. lb but it would also be truning at 897 PRM
The plate roll has a 10 to 1 speed reduction which should yield 693 ft. lbs of torque to the rolls except for the obvious losses due to internal leakage of the oversized spool valve plus other accumulated losses IE low flow rate through the motor the pump not being new and so forth I figure there could possibly be a 25 to 30% loss of efficiency if I wind up with 400 ft lbs I'll be more than happy. But I may find that the target main roll RPM of 5 will turn out to be much higher than that even with such a diminutive sized power unit if this is the case I will have to either feather the spool valve or add a flow restrictor or I could up the reduction by adding a second shaft and sprocket system if need be.
I should find out in a couple of days when Bob pays me for mounting the APU on his truck.
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