Good info Richard. Too much to comment at this stage as it will take me some time to think over it.
I this stage I just want to share surge arrestor results. I had one made from aluminum about 270cc capacity. It is membrane-less type.
Pressure variation at set points:
No surge arrestor
2.5VDC ? 4.2AMP-(30-50PSI)
3.8VDC-7.6AMP-(80-100PSI)
4.8VDC- 8.8AMP- (95-125PSI)
5.8VDC-9.7AMP-(120-150PSI)
7.4VDC-10AMP-(150-180PSI)
With surge arrestor (filed with water 100%):
2.5VDC ? 5.5AMP-(60-70PSI)
3.8VDC-8.1AMP-(105-120PSI)
4.8VDC- 8.8AMP- (128140PSI)
5.8VDC-9.3AMP-(140-160PSI)
7.4VDC-9.6AMP-(150-180PSI)
With surge arrestor (filed with water 50%):
2.5VDC ?AMP-(58PSI)
3.8VDC-AMP-(93PSI)
4.8VDC- AMP- (98-102PSI)
5.8VDC-AMP-(140-145PSI)
7.4VDC-7.6AMP-(160-170PSI)
According to test results, having surge arrestor is beneficial to power consumption and pressure variation reduction. Especially if you have proper (membrane type) or air filed arrestor it will make a huge difference. In my case it removed 90% of pressure pulsation and reduced power consumption by as much as 20%. Not to mention all the hydraulic system benefits such as increased flow and reduced stress of the system.
