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Old 09-07-2020, 05:30 PM   #1
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circulator flange gasket


I have a leaking flange gasket on the circulator pump for my boiler but, as usual, finding a part match for old equipment is not easy. Hoping someone can fill in some blanks so I don't have to buy several different gaskets to find a match.
Pump is a Bell and Gossett and what I see on the label is the following:
NRF-22 103332 1A50
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Old 09-07-2020, 06:22 PM   #2
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Re: circulator flange gasket


Buy a sheet of gasket material and cut your own.

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Old 09-07-2020, 06:53 PM   #3
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Re: circulator flange gasket


Part #118368 Bell and Gosset
Your local plumbing supply probably has them. If not:


https://www.supplyhouse.com/Bell-Gos...PR-60-AA-MF-60
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Old 09-07-2020, 07:21 PM   #4
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Re: circulator flange gasket


Tinkerman,
How do you know this is the right gasket? Nothing at the Supply House link matches what I see on the pump and they don't show dimensions so I can't measure and compare. Is this just your experience? It makes sense that most pumps would use the same standard gasket but I would like to be sure.
Also, the gasket in the picture is "flat" but the existing one bulges on one side. Is this bulge just from being compressed?
Unfortunately, the nearest pluming store is an hour away so really rather have it delivered.
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Old 09-07-2020, 07:39 PM   #5
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Re: circulator flange gasket


Here's another supply house that spells it out. Pretty common gasket. SupplyHouse.Com might be a little bit more but I think the shipping is free.



https://www.nationalpumpsupply.com/1...ge-gasket-set/
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Old 09-07-2020, 07:48 PM   #6
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Re: circulator flange gasket


I hadn't see the last one but yes, it says for series NRF which at least matches some part of what is on the pump. Thanks, I think that's what I am looking for.
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Old 09-13-2020, 10:47 PM   #7
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Re: circulator flange gasket


I replaced the gaskets but unfortunately it is still leaking. Turns out there is also a leak around the threads where the copper pipe screws into the flange. I'm pretty sure I will not get the copper threads out of the cast iron flange so I will need to replace the flange. But replace with what metal? Pump is cast iron pipe is copper. I think the bronze flange would be best since there a gasket between bronze and iron but again I am not finding parts to match. Anyone know if this part will work or have a better idea?
https://www.supplyhouse.com/Bell-Gos...Lead-Free-pair
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Old 09-14-2020, 11:18 AM   #8
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Re: circulator flange gasket


Those flanges should work. The NBF pump series is the bronze body version of the NRF series. Not sure about the compatibility of the materials though.
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Old 09-14-2020, 11:30 AM   #9
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Re: circulator flange gasket


A cheaper alternative?
Use the cast iron flange with a brass nipple and female thread to sweat adapter.
Saves $20
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Old 09-14-2020, 11:37 AM   #10
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Re: circulator flange gasket


I would just unscrew the flanges and replace them with the standard flange. If your going to go through all the trouble to isolate the dissimilar metal use a dielectric union.
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Old 09-14-2020, 11:44 AM   #11
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Re: circulator flange gasket


Or a dielectric nipple:


https://www.supplyhouse.com/Bluefin-...-Pex-Insulator
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