Fuel Oil Nozzles??? A vs. B?

[NWOhioChevyGuy]

OK I have an older fuel oil furnace that was rebuilt last year with new pump & blower.

It currently has a 0.90-80A nozzle and I thought I ordered the same, it came yesterday and it is a 0.90-80B nozzle that I purchased.

What is the difference?
Can I use the B?

0.90 = Fuel rate
80 = Angle
Not sure what the A&B designate.

Thanks in Advance!

 

[Kaizen]

B is a solid nozzle stream. A is a hollow cone so there is no oil spraying in the center. Think of a reversed funnel. Sorry not sure if you should interchange them. I always use the factory spec one


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[Will S.]

They are not interchangeable, and only the manufacturer specified nozzle should be used. Serious problems can develop from changing from a hollow spray pattern to a solid. Get the correct one installed.

 

[NWOhioChevyGuy]

Thanks, I did find a good description of the differences and ordered the correct nozzle.

I have to go back and look at my previous order and make certain they did not ship me the incorrect one.

 

[yeldogt]

You should be able to get the manual with specification ... some have it on a nameplate. Also-- there is a derating limit that varies depending on both burner and chamber. With many (most) oil units oversized it can be beneficial to derate them to achieve a longer burn -- but it must be done correctly.