Industry-Knowledge

Sulphuric acid drum pump selection and operating tips

For transferring sulphuric acid (H₂SO₄) from drums, IBCs, or tanks, you need chemically resistant, corrosion-proof pumps that handle its aggressive nature. Here’s what matters:


1. Material Compatibility for Sulphuric Acid

Sulphuric acid concentration dictates pump material choice:

ConcentrationSuitable MaterialsAvoid
<70%Polypropylene (PP), PVDFMetals (except Hastelloy)
70–98%PVDF, PTFE-lined SS316PP (will degrade)
Fuming (>98%)Glass-lined steel, PTFE-onlyMost plastics/metals

SealsPTFE (Teflon®) or Viton® (for <70% only).


2. Best Pump Types for Sulphuric Acid

TypeHow It WorksMax FlowBest For
Electric PP/PVDF Drum PumpSubmersible or drum-mounted20 LPMDilute H₂SO₄ (<70%)
Air-Operated DiaphragmNo electricity, safe for fumes15 LPMConcentrated acid (PVDF body)
Magnetic Drive SS316Sealless, zero leaks25 LPMHigh-purity acid transfers
Manual Rotary PPHand-cranked, no power5 LPMSmall batches, budget option

3. Top Recommended Models

For 20–50% Sulphuric Acid:

  • FLUX FLEXI-PVDF ($600–$1,200)

    • PVDF construction, 15 LPM flow

    • ATEX-certified for safety

For 70–98% Acid:

  • Yamada NDP-20-PTFE ($1,500)

    • PTFE-lined diaphragm, air-powered

    • No metal parts

For Battery-Operated Use:

  • Koshin KTL-PP ($400)

    • Polypropylene, 12V DC

    • Portable for fieldwork


4. Critical Safety Features

✔ Leak-proof design – Sealless or double-sealed pumps.
✔ Ventilation – Pump in well-ventilated areas (acid fumes are hazardous).
✔ Grounding – Prevent static sparks (critical for fuming acid).
✔ Drip trays – Contain spills during connections.


5. Maintenance & Handling Tips

  1. Never add water to acid – Always add acid to water to prevent violent reactions.

  2. Flush with water after use – Prevents crystallization in pumps.

  3. Inspect seals monthly – Replace at first signs of wear.

  4. Store upright – Avoid prolonged exposure to sunlight (degrades PP/PVDF).


6. Accessories for Safe Transfer

  • Chemical-resistant hoses (PTFE or PP-lined).

  • Acid-rated gloves/face shield (for operator protection).

  • Neutralization kit (for spill control).


Warning:

  • <30% H₂SO₄: Corrodes steel but safe for PP/PVDF.

  • >70% H₂SO₄: Attacks plastics; requires PTFE/glass-lined pumps.

  • Fuming acid: Use peristaltic pumps (no metal/plastic contact).

Need a pump recommendation? Share:

  • Acid concentration (%)

  • Container size (drum, IBC, tank)

  • Transfer frequency

  • Preferred power (electric/air/manual)