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Valves, such as common globe, butterfly, and ball valves, that performed satisfactorily for constant flow or variable flow primary-secondary systems generally are not satisfactory for primary-only variable flow systems because of the great variations in differential pressures across modulating control valves in direct return hydronic systems.
Citation: ASHRAE Journal, Vol. 47, No. 9
Product Details
- Published:
- 2005
- Number of Pages:
- 4
- File Size:
- 1 file , 390 KB
- Product Code(s):
- D-26471
