Circulator noise levels

Joe Mattiello

Taco 0012 is a high velocity low head circulator with capacity in flow up to 45 gpm at 4 ft hd. This pump is a great candidate for single pump systems, with multiple zonevalve, so the pressure in each zone stays the same, when the dynamics of the system change frequently. The 0012 pump is very quiet when running, and the system piping also will be quiet as long as you stay within the recommend 4 ft per second velocity for residential applications. However any high head pump may cause a system to be noisy because of velocity exceeding the recommended 4 ft per second. That’s why I always recommend a flat heat circulator when zoning with valves. Obviously there are other variables that would result in a noisy system, but the pump itself is very quiet. As an ambassador of Taco, I can tell you that we get requests to install lights on our pumps so technicians, and a like can tell when the pumps are running. Additionally, the 0012, and the rest of the Taco 00 family of circulators are also available in variable speed versions. For your reference I have attached the catalog data, and you can visit the Taco web site at www.taco-hvac.com for a complete product offering. Feel free to contact me directly if you have additional questions or concerns.




Taco, Inc.
Joe Mattiello
Technical Service Technician
joemat@taco-hvac.com
401-942-8000 X 484
www.taco-hvac.com

Harold

Circulator noise levels

Can anyone with experience with both the following pumps please tell me which has the lowest noise level?

Grundfos UP26-96F or Taco 0012.

An additional bit of information I could also use is which is more appropriate for a variable speed application to maintain constant pressure across the main distribution manifold. The steep curve of the Grundfos or the flatter curve of the Taco.

Thanks

jeff_51

can't speak to application

not enough info, but you should not hear either one of those pumps running

hr

Generally

a wet rotor circ, like the Grundfos, run quieter than dry motors. Cooler also. Although spinning a motor rotor in a fluid will cost a bit of efficiency.

As for injection mixing, generally a low head pump is called for. Although there are more choices these days, hard to find a shallow curve circ ideally suited for VS pumping for smal VS injection systems. Very small pressure drop in the injection piping, usually low gpm requirements in residential applications.

Sounds like you have a larger system, or tighter delta t if you are looking at those circ selections?

hot rod

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Harold

Unfortunately

that (can't hear) has not been the case for the Grundfos. It is too noisy to use in the house. When it is running it is louder than the boiler and other circulators combined. The piping is mounted of rubber lined holders. The noise resonates in the hallway behind the boiler room and I hear it everywhere in the house. We have tried a replacement Grundfos with the same result. I believe the Taco is also a wet rotor system.

This pump is used to provide the circulation water for all the zones which use then use individual loop controls to control flow. The intent is to provide constant pressure across the system with a variable speed pump rather than a bypass valve on the system.

Unknown

noise

Hotrod neglects to mention that the Taco 00 series circulators are also water lubricated(wet rotor) type circs. Historically they have been quiet because of their flat curve, unlike some of the other SIMILAR type products.
Just a little FYI. jhw

Rich Corcoran_24

Noise

The noise you describe from the UP 26 is very irregular. COntact our tech support at 800 333 1366 or drop me an email. One of the biggest complaints we get is the fact that you can't hear the pumps running. Can you describe the noise (rumbling/screacheing, etc.?)

Thanks

RC

Weezbo

just thinking out loud here for a momment,

when a circ pump is bumped to check for operation if it is run for any appreciable time it will indeed rattel and shake if it runs at all...at least that is what i have seen when accidentially mr. nobody has wired in a domestic circ or injection pump or system pump prior to water being put in a system.... Too much air in a system can cause wicked noise from a circ....flanged pumps directly over a boiler that is sorta high temp can do like a surge deal if it isnt constant circ...turbulent water and variable restrictions in the line ,air Addmitters vrs air eliminators...all these things freak with circ pumps...

any pieces of copper shavings from reaming the pipe can beat the bejezzus out of plastic impellers..not letting some water out the wet rotor grunfoss flat shiney screw, is also a really bad deal once the rotor is spun in air for any lengthy time ,pumps no likey...*~/:)