DP to Flow Calc

📋 1. Document Information

Document No.

Revision

Calculation Date

Project / Plant

Tag Number

Service / Line

⚙️ 2. Calculation Input

Measured ΔP

Enter the measured differential pressure value

ΔP Unit

ΔP LRV (Minimum)

Lower Range Value

ΔP URV / ΔP max

Upper Range Value = ΔP maximum

F max (Flow Maximum)

F min (Flow Minimum)

Flow Unit

Flow Coefficient C

C = Fmax / √ΔPmax (auto-calculated)

P1 - Upstream Pressure (Optional)

P2 - Downstream Pressure (Optional)

ΔP from P1−P2

ΔP = P1 − P2 (informational)

📊 3. Calculation Results

Calculated ΔP
—

Calculated Flow
—

Flow Coefficient C

—

ΔP Ratio (% of Max)

—

Flow (% of Max)

—

Flow at ΔP LRV

—

Flow Span

—

Inverse Check

—

📈 4. DP vs Flow Correlation

ΔP %	ΔP Value	Flow Value	Flow %

✅ 5. Reference Example Verification

Example	Given	Expected	Calculated	Status
1	ΔPmax=2500 mmH₂O, Fmax=6000 m³/h, ΔP=500 mmH₂O → F=?	≈ 2,683.28 m³/h	—	—
2	ΔPmax=2500 mmH₂O, Fmax=6000 m³/h, F=3500 m³/h → ΔP=?	≈ 850.69 mmH₂O	—	—

✍️ 6. Execution & Approval

Prepared / Executed By

Checked By

Approved By

Role	Name	Date
Prepared By	—	—
Checked By	—	—
Approved By	—	—

DP Transmitter to Flow Square Root Calculator