Armstrong 570109-377 Armstrong CBV-3FS Flanged Circuit Balancing Valve

570109-377 Armstrong CBV-3FS Flanged Circuit Balancing Valve. Armstrong circuit balancing valves (cbvs) have been used for many years as an effective means of ensuring occupant comfort in buildings. Heating and chilled water systems are designed to deliver the correct amount of heated or chilled fluid to every part of a building’s hvac system. However, this ‘design flow’ is frequently not achieved without the use of balancing valves.