Water Treatment Pumps (Intake→Pre-treat→RO/DI→Post-Treat)
Reliable treatment needs stable flow, clean containment, and validated dosing. We combine multistage centrifugals for RO/high head, inline/end-suction for utilities and filtration loops, mag-drive sealless for corrosive regenerants, and digital/peristaltic metering for hypo, coagulant, antiscalant, and pH control. Brands: Grundfos, Goulds, Griswold, Finish Thompson, Iwaki, LMI, Neptune, Emec, Walchem, Flux, J.L. Wingert, Gorman-Rupp.
Best-Fit Pumps for Water Treatment
| Stage / Service | Best Pump Type | Recommended Brands | Why It’s Best |
|---|---|---|---|
| RAW/pretreatment transfer, filters | Inline / end-suction centrifugal | Grundfos; Goulds; Griswold | Efficient, quiet, easy to service across broad duty points |
| Filter backwash / above-grade O&M | Self-priming centrifugal | Gorman-Rupp | Fast clean-out via inspection cover; forgiving suction geometry |
| RO feed & high-pressure booster | Multistage centrifugal (VFD) | Grundfos CR / TPE | High head in compact footprint; smooth pressure control to membranes |
| DI/IX regenerants (HCl/NaOH) transfer | Mag-drive sealless centrifugal (PP/PVDF/ETFE) | Finish Thompson DB/UC; Iwaki MX/MD | Eliminates seal leak path; broad corrosive compatibility |
| Sodium hypochlorite & oxidizers | Peristaltic or digital diaphragm metering | LMI KML/KBL or PD/TD; Neptune; Emec; Walchem control | Peristaltic resists off-gassing; digital packs turndown & diagnostics |
| Coagulant / pH / antiscalant dosing | Digital diaphragm metering (with validation) | LMI; Neptune; Emec; Walchem (I/O) | Accurate ppm with back-pressure, anti-siphon, columns & quills |
| Drum/IBC chemical handling | Drum/IBC pump + injection hardware | Flux; J.L. Wingert | Ergonomic loading; calibrated columns, quills, and sampling |
Design notes: We size for NPSH margin, membrane manufacturer pressure windows, and chemical compatibility across all wetted parts—including seals, elastomers, and tubing.
Recommended Water Treatment Packages (Placeholders)
Tip Share duty points, membrane model, recovery/flux targets, SDS, temperatures, and controls I/O. We’ll return curves, submittals, and a code-ready BOM.
How We Engineer Treatment Duty
- Containment first: sealless for corrosives/oxidizers; validated dosing hardware.
- Membrane care: stable pressure with VFDs and proper NPSH margins.
- Materials matched: PP/PVDF/ETFE or alloys to SDS and operating temp.
- Serviceability: above-grade self-primers and unioned spools for fast work.
- Integration: Walchem analyzers/controls, alarms, and remote telemetry.
Common Water Treatment Uses
- Media & cartridge filter feed/backwash
- RO/IX/EDI feed and recirculation
- Hypo, coagulant, pH, antiscalant dosing
- Polish & reuse loops
- Plant utility distribution
- Regenerant transfer (acids/caustics)
- Drum/IBC chemical handling
- UV and post-treat circulation
- Lab & rinse water systems
- Tank fill & level control
Clean, Compliant, Easy to Maintain.
Send duty points, membrane specs, chemistry list, temperatures, and control requirements. We’ll size, material-match, and quote a serviceable package with curves and submittals.
Water Treatment Pump FAQs
Peristaltic or diaphragm for sodium hypochlorite?
Hypo off-gasses; peristaltic avoids vapor lock and handles gas well. Digital diaphragm also works when paired with degassing/back-pressure accessories.
Why mag-drive for regenerants?
HCl/NaOH attack seals. Sealless mag-drive removes the primary leak path and simplifies maintenance; we match plastics/elastomers to SDS and temperature.
What do you need to size an RO booster?
Membrane model/array, feed flow, design pressure, temperature/viscosity, pretreatment losses, and desired recovery/flux—plus NPSH available at the skid.