Who makes filtration for AI data centers

Filtration protects the narrowest part of the loop. Cold-plate channels and manifold orifices are small enough that particulate which would be harmless in a building water system will block them, and a blocked channel is a hot die rather than a maintenance ticket. Filters sit inside or immediately ahead of the CDU, on the technology side, and they are sized to the smallest passage anywhere downstream. What makes this more than a commodity purchase is that the debris is generated by the system itself. Installation leaves swarf and sealant, new hoses shed, metals corrode where dissimilar materials meet, and biological growth appears in any loop where the inhibitor package is not maintained. So filtration is paired with the fluid chemistry in this layer rather than being independent of it, and a loop with weak fluid management fouls its filters no matter how good they are. Operationally the thing to look for is differential pressure monitoring and whether elements can be changed without draining the loop, because a filter that requires a shutdown to service tends not to get serviced. On the supply side these are the industrial filtration houses rather than data center specialists, selling the same technology into process industries — which means the qualification question is fluid compatibility and micron rating, not whether the vendor knows data centers.