While I have studied the Clark device fairly deeply, it would be speculation to state what might happen if used in the proposed scenario. However, perhaps a deeper understanding may help you figure out if it's worth trying.
The Procon pump's GPH rating is a nominal value. The flow rate is almost linearly tied to the rotational speed. The nominal rate is given for a rotational speed of 1725 RPM
, at 100 PSI. With the same speed, but with back pressure increasing, the flow rate will decrease.
The Series 5
pump most likely used in the Newport 400 system you have, achieves various flow rates presumably through variations in vane configuration and/or pump chamber volume. The models may, according to feedback from Procon, not be modified for a different flow rate.
The Clark device you have will divert 10% of its total flow through the membrane. It does this regardless of pressure. If you increase membrane surface area, through adding additional membranes, or going with a larger diameter membrane, at a given flow rate, the back pressure produced will decrease. In order to retain desired product quality (salinity level), flow rate, hence, pressure, needs to be adjusted to compensate.
The 10% Clark device amplifies the incoming pressure roughly ten-fold, whereas the 20% device gives just under a five-fold increase. Could the 10% pump handle the 215 GPH flow rate at about 200 PSI? Could it even handle the 200 PSI? Given Spectra's years of experience, and reputation for dependable products, one would expect there to be a good reason for using a device with twice the piston rod cross area on the larger models than the Newport 400.
As you're contemplating this upgrade, through adding pressure vessels, high pressure plumbing
, a new Procon pump, a new drive motor, a motor speed controller, but leaving the Clark as is, you indicate you're quite comfortable with performing such an intricate upgrade yourself. You should also be comfortable with the idea that while it might work
, you could have a system that is less reliable, with a significantly greater chance of failure, than if the Clark device is also updated.
My recommendation is to engage Tellie, to see if he's willing to sell you the Spectra parts
you need, and to work with you on the design, to get your current
system upgraded to what you desire.