Basics of Control Valve Sizing – Key Terms & concepts
Pressure Drop
The difference in pressure between upstream and downstream the control valve, caused by resistance to flow. Pressure drop is pressure loss across the valve created by system demand - NOT by the valve alone.
How to Determine Pressure Drop
To determine ΔP across a valve, subtract the outlet pressure (P2) from the inlet pressure (P1).
ΔP = P2 – P1
Importance of Pressure Drop in Valve Sizing
Pressure drop is a critical element in valve sizing and valve application. Pressure drop must be known by the engineer designing the system to ensure proper valve selection
What Determines Valve Pressure Drop?
The critical factors are orifice size and internal flow paths of the valve.
Relationship between the Flow Rate and Pressure Drop across a Control Valve
Pressure drop and flow rate are dependent on one another. The higher the flow rate through a restriction(control valve), the greater the pressure drop. Conversely, the lower the flow rate, the
The difference in pressure between upstream and downstream the control valve, caused by resistance to flow. Pressure drop is pressure loss across the valve created by system demand - NOT by the valve alone.
How to Determine Pressure Drop
To determine ΔP across a valve, subtract the outlet pressure (P2) from the inlet pressure (P1).
ΔP = P2 – P1
Importance of Pressure Drop in Valve Sizing
Pressure drop is a critical element in valve sizing and valve application. Pressure drop must be known by the engineer designing the system to ensure proper valve selection
What Determines Valve Pressure Drop?
The critical factors are orifice size and internal flow paths of the valve.
Relationship between the Flow Rate and Pressure Drop across a Control Valve
Pressure drop and flow rate are dependent on one another. The higher the flow rate through a restriction(control valve), the greater the pressure drop. Conversely, the lower the flow rate, the
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