MORRIS PUMPS
Series 6100 - Benefits of High-Chrome Construction

Morris 6100 CT wet end material of construction is an iron alloy of 28% chrome. In its annealed state it is machined to exacting tolerances. A controlled heat-treating process provides Morris 28HC650 with a final hardness of 650 BHN minimum.

Machined surfaces allow confined o-ring sealing
» Improved sealing versus flat gaskets
» O-ring not exposed to high velocity wear areas


Drilled and tapped holes eliminate use of "soft metal" inserts

» Greater reliability and serviceability
» Won't pull out from torque or pipe strain


Straight machined fit impeller bore
» Key driven to assure positive torque transfer
» Does not require "re-babbitting” or trial fitting
» No bore failure as result of starting/stopping torque


History of performance
The selection of 28% high chrome iron construction for the 6100 CT is backed by a long history of slurry pump design & manufacture. High chrome has been the standard for slurry pumps. where abrasion resistance is directly related to operational savings. Industrial, process and mining operations have been specifying high chrome iron because every minute of downtime can be measured as an opportunity cost. Specifying high chrome construction assures the highest level of reliability for critical applications.


Testing of materials
Morris has conducted extensive materials testing that confirms the benefits of high chrome construction in abrasive applications. One test compared four materials in a simulated field condition. Cast Iron. Ni-Hard. Cryogenically Treated Ni-Hard and High Chrome Iron were subjected to high velocity rotation in concentrated silica slurry to replicate long-term abrasive operation. Test results indicate that high chrome iron exhibited superior relative wear resistance by a factor of nearly 1.5. For reprints of this test, contact Morris Pumps.










Hardness doesn't tell the whole story Brinell. Rockwell and Vickers testing for hardness are all excellent measures of superficial hardness, but are not necessarily an accurate measure of abrasion resistance. These conventional tests do not account for the hardness depth or the "toughness" factor. While Ni-Hard and other high alloys may have comparable surface hardness, extensive wear tests and field experience have shown that hardened high chrome iron has a more consistent hardness throughout the thickness of the casting, leading to increased wear life and a longer operation.


The high chrome content of 28HC650 contributes to its superior corrosion resistance compared to Ni-Hard. 28HC650 has approximately twice the tensile strength of Ni-Hard #1, and is also less brittle. A more consistent carbide dispersion in combination with state of the art foundry handling, heat treating and stringent cooling cycle management gives 28HC650 a finitely controlled minimum hardness of 650 BHN.

Morris 6100 CT - Truly the toughest severe duty recessed impeller pump!


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