Sealless Pump — Caustics/Bases
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LibertyCES has documented Sealless Pump in Caustics/Bases service, including Caustic Soda. Wetted materials to confirm: PFA and PTFE. Documented models include Richter MNK/RM and Finish Thompson UC/UCR. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Notes from the vendor documentation
Richter names caustic soda explicitly in its base-chemicals process list.
Materials documented for this service
- PFA
- PTFE
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| Richter Base Chemicals named applications | Chemical Waste Treatment, Chloralkali electrolysis, Fertilizers Production named directly | Richter Chemie-Technik — Industries + Centrifugal Magnetic Drive Pumps |
| Richter F&B CIP named chemical | Caustic Soda named explicitly among Richter's CIP process chemistries | Richter Chemie-Technik — Industries + Centrifugal Magnetic Drive Pumps |
| RM no-O-ring design | Real, stated reliability claim: "the pump does not require O-rings" | Richter Chemie-Technik — Industries + Centrifugal Magnetic Drive Pumps |
| RM temperature range | -30°C to +150°C (-20°F to +300°F) | Richter Chemie-Technik — Industries + Centrifugal Magnetic Drive Pumps |
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
Can Sealless Pump handle Caustics/Bases?
Richter names caustic soda explicitly in its base-chemicals process list.
What wetted materials should Sealless Pump use in Caustics/Bases service?
Materials documented for this service: PFA, PTFE. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Caustics/Bases chemicals does this cover?
Named chemicals in this documentation: Caustic Soda (NaOH).
Which Sealless Pump models are documented for Caustics/Bases?
Documented examples include Richter MNK/RM, Finish Thompson UC/UCR.
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated