Metering Pump — Acids
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LibertyCES has documented Metering Pump in Acids service, including Phosphoric Acid, Nitric Acid and Sulfuric Acid. Wetted materials to confirm: PVDF, Halar/ECTFE, PTFE and Alloy 20. Documented models include Dosatron D14T/D132/D400 and Griffco injection valve/quill. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Notes from the vendor documentation
Dosatron explicitly markets phosphoric/nitric acid injection; Griffco sulfuric-acid material bulletin applies to metering-pump accessories (injection valves/quills).
Materials documented for this service
- PVDF
- Halar/ECTFE
- PTFE
- Alloy 20 (accessory-level)
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| Griffco sulfuric acid material table | Noryl max 95% @200°F; PVDF max 95% @175°F; Halar (ECTFE) 100% @200°F; PTFE (one-piece flanged) 100% @200°F; Alloy 20 100% @300°F | Griffco Valve — Chemical Feed System Accessories |
| Griffco 98.3%+ sulfuric acid failure threshold | At 98.3%+ concentration, sulfuric acid carries dissolved sulfur trioxide (SO3) that attacks and causes stress fractures in both PVDF and Noryl | Griffco Valve — Chemical Feed System Accessories |
| Dosatron D14T acid CIP spec | 0.5-1.5% phosphoric or nitric acid at 140-160°F, dissolves milkstone/beerstone/scale deposits | Dosatron — Water-Powered Dosing Pumps |
| Dosatron D14T thermal/material spec | Max water temp 158°F, high-temp elastomers, metal-free wetted path on key versions | Dosatron — Water-Powered Dosing Pumps |
Griffco's own bulletin flags a real, distinct failure mode: PTFE's acid compatibility only holds in one-piece flanged construction — threaded PTFE connections are prone to leak from cold flow, a recurring cross-vendor failure pattern, not a one-off defect.
Sulfuric acid above 98.3% concentration isn't just "stronger acid" — Griffco's own bulletin shows it carries dissolved SO3 that stress-fractures both PVDF and Noryl, materials that hold up fine below that threshold; the real spec question on a concentrated-sulfuric metering line is exact concentration, not just "is it acid-resistant."
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 Metering Pump handle Acids?
Dosatron explicitly markets phosphoric/nitric acid injection; Griffco sulfuric-acid material bulletin applies to metering-pump accessories (injection valves/quills).
What wetted materials should Metering Pump use in Acids service?
Materials documented for this service: PVDF, Halar/ECTFE, PTFE, Alloy 20 (accessory-level). Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Acids chemicals does this cover?
Named chemicals in this documentation: Phosphoric Acid, Nitric Acid, Sulfuric Acid, Citric Acid (CIP).
Which Metering Pump models are documented for Acids?
Documented examples include Dosatron D14T/D132/D400, Griffco injection valve/quill (accessory).
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated