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CEMs Pump Part Replacement

Updated: Apr 12

Easy Reference Guide

Understanding CEMs Pump Maintenance and Part Replacement using an ADI pump example.

The ADI pump in CEM systems is instrumental in ensuring the continuous and accurate sampling of emissions. It's designed to handle the rigorous demands of transferring gas samples from the emission source to the analyzing system without contamination or loss of sample integrity.

We’ll address each of the most common hardware parts and their maintenance considerations.

Common Parts and Their Vulnerabilities


  • Function: The diaphragm is the heart of the ADI pump, responsible for creating the necessary pressure differential to move the gas sample.

  • Failure Causes: Diaphragms can fail due to wear from continuous flexing, exposure to harsh chemicals in the gas samples, or temperature extremes that may cause the material to degrade.

  • Preventive Measures: Regular inspection for signs of wear or degradation; scheduled replacements based on manufacturer's recommendations or operational hours.

Screws and Fasteners:

  • Function: Screws and other fasteners hold the pump assembly together, ensuring a tight seal and proper alignment of all parts.

  • Failure Causes: These components can become loose due to vibration during operation or corrode in harsh environments, compromising the pump's integrity.

  • Preventive Measures: Periodic checks to ensure tightness and integrity; use of corrosion-resistant materials if the pump is exposed to harsh conditions. Talflo’s PTFE coated screws offer great corrosion resistance.

Gaskets and Seals:

  • Function: Gaskets and seals provide necessary sealing to prevent leakages of gas samples, maintaining the accuracy of measurements.

  • Failure Causes: Over time, gaskets and seals can degrade due to chemical exposure, temperature fluctuations, or simply wear out from compression.

  • Preventive Measures: Regular inspections for signs of wear or leaks; replacement during routine maintenance or when leaks are detected.

Washers and Hardware:

  • Function: Washers distribute a load of fasteners like screws, preventing damage to the pump's surface and ensuring a secure fit. Other hardware may include spacers, clips, and brackets that maintain the structural integrity of the pump.

  • Failure Causes: These components can wear out or corrode over time, especially in environments with high moisture or corrosive gases.

  • Preventive Measures: Regular inspection for signs of corrosion or wear; replacement with corrosion-resistant materials if necessary.

Maintenance Tips for Longevity and Reliability

  • Routine Inspections: Regularly scheduled inspections can identify wear and tear before it leads to pump failure. Look for signs of material degradation, leaks, or loose components.

  • Adherence to Maintenance Schedules: Follow the manufacturer's recommended maintenance schedule for part replacements, even if no immediate signs of wear are evident. Preventative maintenance is key to avoiding unscheduled downtime and the headaches that come with them.

  • Use of High-Quality Replacement Parts: Talflo ensures that the pump parts are made to the same standard or higher than the OEM to ensure that they last.

  • Environmental Considerations: Consider the operating environment of the pump and select materials that are suited to withstand the conditions, especially if the pump is exposed to corrosive gases or extreme temperatures.

By staying ahead of maintenance needs, operators can prevent unscheduled downtimes and maintain compliance with environmental regulations.

The main idea.

By staying ahead of maintenance needs, operators can prevent unscheduled downtimes and maintain compliance with environmental regulations. Saving time and headaches.


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