Articles
Low Air Flow Freezes Pumps!
The primary reason for molten metal pump freezing is "slow starts." A slow-start is defined as slowly increasing the motor RPM. When a transfer pump is slow-started, the hot metal flows gradually into a cooler riser. As the metal temperature decreases, it solidifies or freezes inside the riser. This slow-start condition typically results in permanent damage and the need to rebuild the pump or at the very least replace the riser.
Pump Installation Planning Guidelines – Part 2 – Pump Startup Scheduling
Air Supply Considerations for an Air Motor on a Molten Metal Pump
3-Phase Motor Running Backwards?
Re-use of a Graphite Pump - Not a Warped Idea!
NEVER RUN A PUMP DRY!
Pre-Storage Pump Inspection - Maintenance Pumps
Preparing the Pump for Storage - Operational Assessment and Removal from Metal
Maintenance Pumps and Typical Use Cases
SLOW STARTS FREEZE RISERS
It's worth saying more than once because a frozen riser is a big maintenance issue. In previous post we outlined the procedure for lowering a molten metal pump into the bath. Once the pump is properly lowered into the molten metal, the pump must be turned on or energized.
Pump Installation - Lowering the Pump into the Molten Metal
Graphite Properties and Application in Molten Metal Pumps
Preheating Stations
Less downtime between pump changes. Reduced risk of thermal shock damage when installing a pump. Decreased preheat time. Improved safety.