A balance valve is a measurement and regulation device. Balance valves are 

used in pressurized piping applications, such as HVAC and gas movement 

applications. A balance valve uses a few key components in its construction 

to perform its function within the system.

The main purpose of a balance valve is generally to create a consistent 

output pressure to a system from an inconsistent input pressure from a 

different system. This creates balance for the flow of the material being 

moved through the pressurized system as a whole. In most cases, these 

types of valves are also used as a means of creating a stable flow of material 

within an unstable system. Sometimes, to facilitate this purpose, the balance 

valve must release a set amount of material if the pressure within the system 

builds too quickly.

Balance valves generally must be made out of materials that will not respond 

in any way to the material being sent through them. This means a balance 

valve must not rust, corrode or build up residue from any material passed 

through it. Rather, the valves are basically passive valves that have a set of 

screws in them that determine the point when the valve must divert pressure 

from the system to an outside source.