Leakage · active points · reference flow
Vacuum-leakage demand
Inputs
User-entered normalized leakage demand for one active vacuum point; leakage is not inferred from a workpiece, conductance, or test.
Positive whole count of stated active vacuum points with the same declared leakage record.
Percent greater than 0 through 100 used only to scale the declared leakage demand.
User-entered reference suction-flow value for literal ratio arithmetic only; it is not a capacity result or selection input.
Results
Literal average normalized leakage demand
5
NL/minDeclared reference suction flow
8
NL/minLiteral leakage demand / reference-flow ratio
0.625
—Literal leakage volume per elapsed hour
300
NL/elapsed hQleak,avg = qleak·z·D/100; ratio = Qleak,avg/Qref; Vper elapsed hour = 60·Qleak,avg
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
Aggregate normalized leakage demand across a number of active vacuum points and compare it to a reference suction-flow value without selecting vacuum equipment.
Qleak,avg = qleak·z·D/100; ratio = Qleak,avg/Qref; Vper elapsed hour = 60·Qleak,avg
When
- User-entered leakage per active point
- Declared active-point count
- Literal reference-flow comparison
Don’t
- This aggregates only user-declared normalized leakage demand, active vacuum-point count, and active-time fraction. It does not infer leakage from workpiece geometry, surface condition, conductance, porous materials, vacuum level, response time, or test data; select a vacuum generator, pump, pad, or number of pads; assess capacity, safety, suitability, or approval.