Chemical Compatibility

Peristaltic Hose Pump — Caustics/Bases

Strong evidence

Named chemicals

lime slurrycalcium hydroxide (Ca(OH)2)hydrated lime / milk of limecalcium carbonate (CaCO3)

What LibertyCES's vendor documentation shows

Fixes a real hole — lime slurry / calcium hydroxide was missing entirely as a notable_chemical under Caustics/Bases despite being the subject of a LibertyCES case study. The rule is the content, not the pump: for a crystallizing slurry the failure mode is chemistry/mechanics mismatch, not pump strength — 'fewer places for the chemical to sit, dry, crystallize' rather than more force. Measured outcomes: clog shutdowns from ~10/year (4-6 hrs each) to zero, hose life 12+ months, labor savings $3,900-$6,500/year. Mechanism: single roller compressing an engineered hose through 360°, no valves/seals/glands in the fluid path, reversible to clear blockages without disassembly, self-priming. Corroborated by the chart's 316SS-only-G rating on calcium hydroxide and carbonate — a metal-wetted pump is the weaker material choice before crystallization mechanics are even considered.

Materials documented for this service

Hose: Nitrile, EPDM, natural rubber, CSM/Hypalon
Barb: 316 stainless steel, Hastelloy-C, PVDF
Flowline chart, Calcium Hydroxide saturated @ 40°C/104°F: PVC E, PP E, PVDF E, PFA E, PTFE E, 316SS only G
Flowline chart, Calcium Carbonate saturated: 316SS G at both 40°C and 80°C while all thermoplastics rate E

Products cited for this service

Graco SoloTech 30 (30mm hose, 16.0 GPM max @ 91 rpm) — the model specified on the California water treatment plant lime slurry jobSoloTech 10 (10mm, 0.685 GPM @ 92 rpm)SoloTech 23 (23mm, 4.75 GPM @ 94 rpm)SoloTech 26 (26mm, 10.18 GPM @ 93 rpm)SoloTech Peristaltic Industrial: 98 total SKUs across motor type x hose material x barb material; sample real SKUs 19X001, 19X010, 19X018, 19X022, 19X025, 19X026, 19X027, 19X029

Sourced to

data/case-studies/solotech-lime-slurry.md
data/vendor-sources/graco-peristaltic-pumps.md
data/vendor-sources/graco.md
data/vendor-sources/allied-fluid-products-line-card.md
data/reference/flowline-chemical-compatibility.csv

Every material and product claim on this page traces to the vendor documentation listed above. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.

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