Manufacturer for Oil Burner Constant Differential Pump?

[sb3]

We have utility boilers where oil is supplied to the burners and part is recirced back through a "constant differential pump" which controls the differential across the burner tips. This is a multistage centrifugal pump. The biggest ones we have are 440 GPM and 760 ft head. They pump #6 fuel oil at 210 degrees. The constant differential pumps are fed by burner pumps which put up 720 psig. Does anyone know a good manufacturer for new constant differential pumps like this (high suction pressure centrifugals)? We would prefer horizontal pumps. Are there any we should stay away from?

 

[Kawartha]

sb3,

There are many high quality multi-stage pumps available. Look at FLOWSERVE, Sulzer, KSB and Ebara. There are also many more in this market. Why not look at the company that supplied your current pumps.

 

[sb3]

Thanks Kwartha,

We were already talking to Sulzer. I had not approached the others on your list though. Our experiences with Flowserve have not been positive in recent years so they are only used as a last resort. They may have satisfactory pumps but their sales and service/parts organizations have problems. The original manufacturer was United Centrifugal 40 years ago. I don't know if they were swallowed by someone or just disappeared. I was hoping to find someone who might have some of pumps like these in stock. Dream on, right?

 

[Kawartha]

sb3,

I had a quick look on the net, and it looks like United was taken over by Byron Jackson, which is now FLOWSERVE. Back to square 1.