Metering Pump Dosage & Pressure Derating Calculator
Real Graco G-Chem baseline dosage and pressure-derating data, digitized directly from the vendor's own manual — not an estimated formula.
30+ years spec experience. Send James the process data and get a real answer — not a catalog page.
Request a Spec Review →Graco G-Chem Chemical Injection Pump
| CPM | Dosage (GPD) | Dosage (LPD) |
|---|
Source: Graco G-Chem Chemical Injection Pump — vendor-published baseline dosage table and performance-chart pressure derating, digitized from the vendor manual. Real vendor data, not estimated.
Maximum Dosage vs. Discharge Pressure
Select drive type to see how maximum deliverable dosage derates as discharge pressure rises, per Graco's own performance charts.
| Discharge Pressure (PSI) | Max Dosage (GPD) | Max Dosage (LPD) |
|---|
Source: Graco G-Chem Chemical Injection Pump — vendor-published baseline dosage table and performance-chart pressure derating, digitized from the vendor manual. Real vendor data, not estimated. Includes variable speed per vendor footnote.
Frequently Asked Questions
How is chemical metering pump dosage calculated?
For a fixed-displacement plunger pump, dosage scales linearly with strokes per minute (CPM) — this calculator uses Graco's own published baseline dosage table for the G-Chem series, not an estimated formula.
Why does dosage drop as discharge pressure rises?
A metering pump's maximum deliverable dosage derates as back-pressure increases — the pump has to work harder against higher discharge pressure, reducing the maximum volume it can push per stroke. This calculator shows Graco's own published performance-derating curves.
Does this calculator apply to other pump brands?
This specific tool uses Graco G-Chem published data only. Dosage and derating behavior varies by manufacturer, series, and drive type — send LibertyCES your target dosage and pressure for a confirmed recommendation across brands.
Need dosage confirmed for a different brand or chemistry?
Send James your target dosage, pressure, and chemical — get a confirmed pump recommendation, not a generic estimate.
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].