Phone: 440-543-8271

Email: sales@hitemp.com

8
Nov

Low Air Flow Freezes Pumps!

This post is an addendum to the post titled Air-Supply Considerations For An Air Motor On A Molten Metal Pump. 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. …

3
May

Expertly Optimized Solutions

High Temperature Systems, Inc. has a long history of being a solution provider in the melt department by developing, manufacturing, and installation guidance for molten metal circulation and transfer pumps. In the past two years, we have made significant changes in our business that allow us to become a true Solution Partner by providing higher …

20
Apr

Impeller Types and Purposes

Three Main Types of Impellers We offer three different types of impellers for many of our molten metal pumps. (The impeller is the vaned wheel that spins inside the pump base.) The impeller and its interaction with the pump base (and base volute) largely determine the performance characteristics of a given pump design. Each impeller ...
25
Jan

Why should I use a circulation pump? Updated 25-Jan-2016

Updated 25-Jan-2016 Early Reverb Furnace Designs The reverberator (reverb) furnace has been in use since medieval times. This diagram shows a primitive reverberatory furnace of an early design. The entire furnace could be constructed from natural refractory materials such as clay. This design has a range of limitations that has led to the modern reverb furnace. For …

20
Jan

Small Pump Well? You need a Chameleon!

Pump Well Size A recent survey of installed aluminum reverb furnaces found that most included a pump well only large enough for a properly sized circulation pump. With manufacturing floor space at a premium and furnace prices increasing, it is no surprise that the pump well would be kept to an absolute minimum. There is …

11
Jan

Re-use of a Graphite Pump – Not a Warped Idea – Update 11-Jan-16

Updated 11 January 16 Unlike stainless steel pumps, graphite pumps can be quickly and easily reintroduced into the molten metal bath, and the pump will operate with the same efficiency as when removed from the melt. This capability is because graphite retains its structural and dimensional integrity while stainless steel becomes flexible and deforms at …

24
Feb

Like a Launder, Only Better!

A launder is used to transport molten metal. The basic construction of a launder is a steel trough lined with refractory material to insulate the molten metal from the steel. (Insulating both thermally and chemically.) The molten metal will lose heat as gravity draws it down the launder. If the heat is lost too fast, …

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 …

20
Dec

Graphite Properties and Application in Molten Metal Pumps

Graphite is the refractory material of choice for many non-ferrous molten metal pump applications. Below is a list of graphite characteristics that are important in pump applications: Dimensional Integrity – Graphite maintains mechanical dimensional integrity across a wide range of temperatures. Unlike steel alloys that bend and twist, graphite remains dimensionally stable and displays relatively …

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 …