Brent,
I don't know what you are looking at exactly. But it seems it might be some blast gates with switches and a controller to turn the DC on and off. I want that kind of system but I am planning on just buying a solid state relay, probably from Amazon, using a small DC power supply - like we all use to charge batteries - and some micro switches. I haven't seen a commercial system I want and the parts to do this are pretty cheap. I will probably make my blast gates too. I've done it before and it is not difficult. I tried cheap plastic blast gates and they plugged easily. I do not want to spend time unclogging or cleaning blast gates. There are nicer metal self cleaning blast gates but they are more than I want to spend. Most are for 4 inch pipe and I want to use 5 or 6 inch. Some stuff to think about.