Diaphragm Pump — Caustics/Bases
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LibertyCES has documented Diaphragm Pump in Caustics/Bases service, including Potassium Hydroxide and Sodium Hydroxide. Wetted materials to confirm: PP, PVDF and 316SS. Documented models include Graco QUANTM i30. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Notes from the vendor documentation
Cheese-plant wastewater case study: QUANTM electric diaphragm pump dosing 50% H2SO4 and 45% KOH, 24% chemical savings.
Materials documented for this service
- PP
- PVDF
- 316SS (unsuitable per case study)
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| Case study dosing chemicals | 50% sulfuric acid and 45% potassium hydroxide (KOH) dosed via Graco QUANTM i30 electric diaphragm pump | LibertyCES field case study: Industrial Wastewater pH Control (Cheese Plant) |
| Case study scale and pre-fix losses | 125,000 GPD industrial wastewater plant; manual adjustment caused 18-25% chemical overuse before automation | LibertyCES field case study: Industrial Wastewater pH Control (Cheese Plant) |
| Case study results | 24% chemical savings (sulfuric acid + KOH combined); zero safety incidents or compliance violations in 12 months post-install | LibertyCES field case study: Industrial Wastewater pH Control (Cheese Plant) |
| QUANTM diaphragm material options | Buna-N, FKM (Viton), G.E.T. (Graco Engineered Thermoplastic), PTFE Overmold, PTFE/Santoprene 2-Piece, Santoprene, TPE (Hytrel) | Graco — Diaphragm Pumps |
The case study's own pre-fix failure mode: batch flow swings plus delayed sensor feedback caused unstable pH correction, and fouled probes reduced operator confidence in the readings — the reason closed-loop dosing replaced manual adjustment rather than just replacing the pump.
The cheese-plant wastewater job wasn't a pump-strength problem — the plant was already dosing 50% sulfuric acid and 45% KOH, just on unstable feedback with 18-25% manual chemical overuse baked in; switching to the QUANTM i30's electric diaphragm on closed-loop control cut chemical use 24% without touching the underlying chemistry at all.
Every material and product claim on this page traces to real, vendor-published documentation on file with LibertyCES. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.
FAQ
Can Diaphragm Pump handle Caustics/Bases?
Cheese-plant wastewater case study: QUANTM electric diaphragm pump dosing 50% H2SO4 and 45% KOH, 24% chemical savings.
What wetted materials should Diaphragm Pump use in Caustics/Bases service?
Materials documented for this service: PP, PVDF, 316SS (unsuitable per case study). Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Caustics/Bases chemicals does this cover?
Named chemicals in this documentation: Potassium Hydroxide (KOH), Sodium Hydroxide.
Which Diaphragm Pump models are documented for Caustics/Bases?
Documented examples include Graco QUANTM i30 (electric diaphragm).
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated