Pump Seal Failure - Due to Corrosive Acid Exposure
Pump Seal
Failure
Due to Corrosive Acid Exposure
Switch to Seal-Less AODD Pumps
Replace traditional centrifugal pumps with Air-Operated Double Diaphragm (AODD) pumps. Their reciprocating diaphragm design is inherently seal-less — entirely eliminating the risk of seal leaks when handling aggressive media. No seal means no seal failure.
Utilize Non-Metallic, Polymer-Based Construction
For highly aggressive acids that corrode standard metals, specify pumps constructed from advanced non-metallic polymers such as Polypropylene (PP) and Polyvinylidene Fluoride (PVDF). These materials provide near-universal chemical resistance and are heavily used in non-metallic AODD pumps to safely handle acids and solvents without degrading.
Install Magnetic Drive Pumps
Magnetic Drive Pumps — available in both metallic and non-metallic builds — are specifically engineered for leak-free, corrosion-resistant, and maintenance-free fluid handling. They use a magnetic coupling to drive the impeller with no rotating shaft penetrating the casing, making them an ideal solution for safely transferring aggressive chemicals where seal failure is a concern.
Upgrade to Purpose-Built Chemical Process Pumps
If a centrifugal pump design is still required for your operation, use purpose-built Chemical Process Pumps. These feature advanced sealing solutions specifically engineered to prevent leakage and contamination, and are constructed with corrosion-resistant casings and impellers — materials such as PP, PVDF, or SS316 — to withstand aggressive, toxic, and acidic environments.
Go Seal-Less Wherever Possible
The most effective solution to seal failure is to eliminate the seal entirely. AODD pumps and Magnetic Drive pumps both achieve this. Where a centrifugal design is operationally necessary, Chemical Process Pumps with PVDF or PP construction and advanced sealing systems are the next-best engineering choice.
| Solution | Seal-Less? | Acid Resistance | Maintenance | Best For |
|---|---|---|---|---|
| AODD Pump | Yes | Excellent | Low | Aggressive acids, solvents, slurries |
| Magnetic Drive Pump | Yes | Excellent | Low | Leak-free chemical transfer |
| Chemical Process Pump (PP/PVDF) | No | Very Good | Medium | High-flow centrifugal acid duty |
| Chemical Process Pump (SS316) | No | Moderate | Medium | Mild acid / general chemical service |
| Standard Centrifugal Pump | No | Poor | High | Not recommended for acid service |
Sando Editorial Team
The Sando Editorial Team consists of pump technology experts and engineers at Sando Rotary Equipments, dedicated to sharing insights and innovations in the fluid handling industry.
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