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10
Feb

Air Supply Considerations for an Air Motor on a Molten Metal Pump

Our pumps are offered with air motor options. Air motor benefits include: No electrical connections and associated complexities. Pump speed is easily controlled by regulating the air pressure. The pump can be run from a nitrogen bottle during maintenance or emergencies. Air motors run cooler than ambient temperatures. Air motors are lighter weight than their …

28
Jan

3-Phase Motor Running Backwards? Updated 28-Jan-2016

Updated 28-Jan-2016 Editors Note: This post is one of the most frequently viewed on our website. This can be attributed to the high frequency of worn and damaged wiring. With proper electrical maintenance and pump startup procedures, this problem can be 100% eliminated.  3-Phase Motors used on Molten Metal Pumps Nearly all the electric motors …

7
Jan

Dross Pumping Best Practices – Updated 6 Jan 2016

Update: 6 January 2016: Using a dross pump is not the same as using a vacuum cleaner, although there are some interesting comparisons (which I will leave up the reader’s imagination.). In this post, I will discuss some best practices for zinc dross pumping. Why pump dross? It’s all about zinc pot down time. Dross …

18
Mar

Line Reactors Improve Pump Motor Performance

Dirty Power Surprisingly few industrial facilities conduct power line quality assessments as part of routine maintenance. In a heavily mechanized environment, fast-transient power disruptions are common place. These fast transient events travel through out the power circuits and are stopped only by the power distribution transformers. This means that each individual piece of equipment must …

7
Feb

NEVER RUN A PUMP DRY!

The molten metal IS the lubrication for the impeller and base-volute. Running the pump dry will result in damage. The only question is how much damage. This impeller is an example of a very costly mistake. A broken impeller is probably the best possible outcome of running a pump dry. Most likely, the damage would …

4
Feb

Preparing the Pump for Storage – Operational Assessment and Removal from Metal

Operational Assessment – Before Removing the Pump from the Metal About 10% of pumps are used exclusively for scheduled furnace maintenance. Between usages, these pumps need to be properly stored and maintained. The first step to good pump maintenance is an operational assessment. Study the pump’s operation prior to de-energizing and removal from the molten …

3
Feb

Maintenance Pumps and Typical Use Cases

About 10% of molten metal pumps are used exclusively for maintenance applications. It is not uncommon to use a maintenance pump once every year to eighteen months. Long term storage of a pump, especially a pump that has been exposed to molten metal, requires special considerations. Maintenance pumps tend to undergo rougher duty than continuous circulation and transfer pumps. …

23
Dec

Pump Installation – Lowering the Pump into the Molten Metal

The following is standard procedure for introducing a pump into a molten metal bath: WARNING – GRAPHITE CONTAINING MOISTURE MAY EXPLODE IN MOLTEN METAL!  ALWAYS REFER TO THE MANUAL THAT SHIPPED WITH YOUR MOLTEN METAL PUMP FOR ADDITIONAL SAFETY INFORMATION. IF YOU SEE THE PUMP “BUBBLING” AT ANY POINT IN THE FOLLOW PROCEDURE, LIFT THE …

22
Nov

Hoist Considerations

Before you use that shiny new electric hoist, consider this. Hoists that are not equipped with variable speed controls can be hazardous to your health and the health of your molten metal pump. Recently, I have heard a range of complaints regarding poor speed control with electric hoists. In most cases, the speed is to too …

21
Nov

Rock Catcher Basics

Rock Catchers are used to keep large chunks of material from interfering with proper pump operation. Rocks, chunks, clumps, are all terms to describe material in the melt that is a bit too large to flow through the impellers orifices. Rocks are comprised of: Chunks of scrap that have not fully melted. These will eventually melt …

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