Galling of Wear Rings on Centrifugal Pump
Galling of Wear Rings on Centrifugal Pump
(OP)
Hi All,
I have a problem of 'galling' of some centrifugal pump wear rings. The casing ring as well as the impeller ring is made from the same material, duplex stainless steel.
In my experience stainless steels are particularly susceptible to galling, and I suspect that having both wear rings made from the same material has caused the problems.
Has anyone had any similar experiences? I wonder if changing the casing ring to a different material, e.g. phosphor bronze, would help.
Appreciate any comments.
I have a problem of 'galling' of some centrifugal pump wear rings. The casing ring as well as the impeller ring is made from the same material, duplex stainless steel.
In my experience stainless steels are particularly susceptible to galling, and I suspect that having both wear rings made from the same material has caused the problems.
Has anyone had any similar experiences? I wonder if changing the casing ring to a different material, e.g. phosphor bronze, would help.
Appreciate any comments.





RE: Galling of Wear Rings on Centrifugal Pump
"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein
RE: Galling of Wear Rings on Centrifugal Pump
Without hard coating, stainless steel on stainless steel is one of the worst possible options for wear ring combinations.
Johnny Pellin
RE: Galling of Wear Rings on Centrifugal Pump
API 610 also requires additional 0.005" on the minimum clearances for materials with high galling tendency. Even if these are not API pumps, it is still a good design guide.
RE: Galling of Wear Rings on Centrifugal Pump
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Galling of Wear Rings on Centrifugal Pump