Preventing Liquid Chromatograph Pump Failure
A liquid chromatograph pump is an essential component of liquid chromatography systems. Malfunctioning pumps can lead to data inaccuracies, undetected sample contaminations, chromatographs that won’t run and other problems. Proper maintenance and prevention can minimize the risk of pump failure.
Choose a Pump Compatible With Your System
Be sure to use pumps specifically designed for your system to minimize the risk of failure. Many times, a generic pump may appear to work, but will not pass the tests or quality assurance requirements your system must meet. Pay attention to pump specs, review user manuals and research approved compatible pumps before selecting a liquid chromatograph pump for your system.
Proper Maintenance Schedule
Regular maintenance is key to prevent pump failure. Set up a multilevel maintenance system that includes different service checks, sampling and oil changes. Detect problems early to avoid costly and time-consuming downtime.
Oiling
Ensure that liquid chromatograph pumps have the correct amount of oil and that it is free from contaminants. Change the oil every six months or 400 running hours, whichever comes first.
Sampling
Collect samples during maintenance cycles to check for contamination, abnormal flow rate or pressure, abnormal head-space pressure, abnormal bearing noise or vibration, and other abnormalities. Grind gears and drive components may give off visible signs of wear.
Check and Change Filters
Filter should be changed every 6 to 8 months or when they start to show signs of clogging. The filter prevents contaminants from entering the pump and causing damage.
Check Fluid Level
Low fluid levels will cause pump failure, as may too much fluid. Check fluid levels regularly.
Check Electrical Connections
Faulty electrical connections can cause pump failure. Inspect all electrical connections and replace them if needed.
Check Heat Grips
Heat Grips can be used to exhaust heat from the base of the pump. Make sure the Heat Grips are operating properly. Hot Heat Grips can prevent proper seals from forming and cause pump failure.
Check for Leaks
Leaks can cause pump failure. Inspect the liquid chromatograph pump and seals for any potential signs of leaks before starting a run.
Periodic Calibration
Make sure liquid chromatograph pumps are calibrated on a routine basis. This will ensure accurate readings during use.
Avoid Overloading
Liquid chromatograph pumps can be overloaded and fail. Don’t exceed its maximum load and make sure to reduce any load on the pump while it’s running.
Conclusion
Liquid chromatography systems are only as reliable as their pumps. Follow best practices to prevent pump failure and extend the life of your liquid chromatograph pump.
