Static head · quadratic loss · flow
System-head curve point
Inputs
User-entered static head at zero flow; elevation, pressure boundary, and other contributors are not derived.
User-entered coefficient in compatible head-per-flow-squared units; no pipe, valve, or fitting loss is derived.
User-entered flow point used only to report one literal system-head value.
Results
Literal declared system head at flow point
18
Declared static-head offset
10
Literal declared quadratic loss head
8
Declared flow point
4
Hsystem(Q) = Hstatic + K·Q²
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: Hydrostatic pressure · Flow continuity · Pipe mean velocity · Bernoulli equation
Method
Formula, when it applies, and when it does not
Add static head to a quadratic-loss coefficient at one flow point without generating a pump curve or selecting a pump.
Hsystem(Q) = Hstatic + K·Q²
When
- User-entered quadratic-loss coefficient
- One scalar system-head relation
Don’t
- This adds only a declared static-head offset to a declared quadratic-loss coefficient at one declared flow point. It does not derive the coefficient; model pipe, fitting, or valve losses; generate a full curve; find an operating point; compare a pump curve; select a pump; determine NPSH, capacity, efficiency, safety, suitability, or approval.