Chilled water and hot water filteration

[ssn61]

I am working on HVAC renovation of an old school that has failing and clogged hydronic pipes. Until we replace these pipes, what is the best temporary and economically feasible solution to filter hot & chilled water and keep boilers and chillers to get damaged because of scale and debris from piping?

 

[MintJulep]

Y strainers.

Course and fine in series.

Two sets in parallel to allow baskets to be cleaned.

 

[ssn61]

Thanks for the response MintJulep. Any specific manufacture or model you would recommend?

 

[RossABQ]

Increase your bottom blowdown on the boilers, too. (Steam or HW?)

 

[Drazen]

y-strainers are pretty generic, any you use that is declared for hydronic installation would be satisfactory.

with situation you have you should consider additional device, installed in series with strainers. there are many names for it, the most frequently i hear about "microfilters". they are advertised to gradually remove dirt from old piping. i tried it couple of times with excellent results. google Caleffi, they developed large operations in usa, and Taco is there as well.

 

[RossABQ]

There are also bypass filter/feeder units, Bell & Gossett, et al make them. A sidestream, finer filter so you don't have quite as much energy penalty trying to filter the entire flow stream to a high degree.