This statement was developed by the Public Health Nursing Definition Document Task Force. under the direction of the leadership of the Public Health Nursing Section of the American. Public Health Association. The statement was adopted by the Public Health Nursing Section.
A pressure balanced Single or Universal Expansion joint is an assembly designed to absorb axial movement and /or lateral deflection while the pressure thrust is balanced by means of an additional bellows and tie rods.
The expansion devices used in refrigeration systems can be divided into. fixed opening type or variable opening type. As the name implies, in fixed. opening type the flow area remains fixed, while in variable opening type the flow. area changes with changing mass flow rates.