NND OIL & GAS

  Air operated double diaphragm pumps are valued for their reliability and simplicity, but like any process equipment, they occasionally develop faults that plant teams need to diagnose and resolve quickly to avoid extended downtime. Understanding the most common problems, and their typical causes, considerably speeds up troubleshooting when an issue arises on the plant floor. A structured troubleshooting approach also helps maintenance teams distinguish between air supply problems, fluid-side restrictions, component wear, and installation-related issues before unnecessary repairs or replacements are carried out. Reduced Flow Output Despite Steady Air Supply When an air operated double diaphragm pump delivers noticeably reduced flow despite a stable air supply, the most common culprits are worn check valve balls or seats allowing backflow, or a partially blocked suction line restricting inlet fluid availability. Inspecting check valves first, since they're generally the most acces...

  Corrosion coupons are a deceptively simple tool, and selecting the wrong type for a given application can produce misleading data that undermines confidence in an otherwise sound monitoring programme. Getting the selection right, whether for water, wastewater, or process chemical lines, starts with genuinely understanding the specific demands of each environment. Material compatibility, flow conditions, exposure duration, and the expected corrosion mechanism all influence whether a coupon produces useful, representative results that can support practical maintenance and chemical treatment decisions. Matching Coupon Material to the Monitored System The fundamental principle of coupon selection is straightforward: the coupon material should match, or closely represent, the material of the pipe or vessel actually being monitored. Mild steel coupons monitoring a mild steel water line provide directly relevant data, while using a different alloy introduces a mismatch that can signific...

  Handling abrasive slurries and high-viscosity chemicals places demands on pumping equipment that centrifugal and standard positive displacement pumps often struggle to meet reliably. An aodd pump addresses many of these challenges directly through its fundamentally different operating principle, making it a genuinely practical choice across a wide range of demanding process applications. Its ability to handle variable fluid characteristics, tolerate intermittent operation, and operate in challenging environments makes it particularly useful where conventional pumping equipment may experience excessive wear or frequent operational interruptions. Self-Priming Capability Reduces Downtime An aodd pump is inherently self-priming, capable of running dry without damage and drawing fluid from significant suction lift without requiring manual priming procedures beforehand. This is particularly valuable in slurry handling applications where intermittent flow or suction line air entrainmen...