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Chemical Compatibility

Sealless Pump — Caustics/Bases

Moderate evidence

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Named chemicals

Caustic Soda (NaOH)

What LibertyCES's vendor documentation shows

Richter names caustic soda explicitly in its base-chemicals process list.

Materials documented for this service

  • PFA
  • PTFE

Products cited for this service

Richter MNK/RMFinish Thompson UC/UCR

Real Specifications

Richter Base Chemicals named applicationsChemical Waste Treatment, Chloralkali electrolysis, Fertilizers Production named directlyrichter-ct-magnetic-drive-pumps.md
Richter F&B CIP named chemicalCaustic Soda named explicitly among Richter's CIP process chemistriesrichter-ct-magnetic-drive-pumps.md
RM no-O-ring designReal, stated reliability claim: "the pump does not require O-rings"richter-ct-magnetic-drive-pumps.md
RM temperature range-30°C to +150°C (-20°F to +300°F)richter-ct-magnetic-drive-pumps.md
Install / Failure Note

RM's no-O-ring construction removes a specific, real degradation point — O-ring swelling/hardening under chemical attack — rather than just specifying a more chemical-resistant O-ring compound, which matters on caustic soda service where elastomers are a known wear point.

Caustic soda service is exactly where O-rings tend to swell and harden over time — Richter's RM family removes that failure point by design rather than by picking a more resistant O-ring compound, the real reason RM sits at a different reliability tier than a standard PFA-lined mag-drive pump on the same NaOH duty.

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

Is Sealless Pump compatible with Caustics/Bases?

Richter names caustic soda explicitly in its base-chemicals process list. This is moderate evidence.

What materials are documented for Sealless Pump in Caustics/Bases service?

Materials documented for this service: PFA, PTFE. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm with a spec review before final specification.

What specific Caustics/Bases chemicals does this cover?

Named chemicals in this documentation: Caustic Soda (NaOH).

What products are cited for Sealless Pump in Caustics/Bases service?

Documented examples include Richter MNK/RM, Finish Thompson UC/UCR.

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