If this is strictly transfer, and not for filtration, then I recommend against positive displacement pumps. One closed valve and you've just blown up your hose. Instead, use a simple centrifugal pump with a VFD. Gentle and smooth transfers without foaming. I'd also recommend using a pump you already have. Makes spare parts easier to have on hand and can be swapped in an emergency. What other centrifugal pumps do you have? Kettle, hot liquor, etc. Also need to know head requirements--ie; what's you highest lift? And how fast do you want this done? Once we know that, we can select a pump for you.
Phillip Kelm--Palau Brewing Company Manager--