Check Valve On Condensate pump

Direwolf35

> and see if there's something caught in it. If it <BR>
> is, that's the problem- and it would be a good <BR>
> idea to flush the receiver tank out too. <BR>
> <BR>
> If <BR>
> the check is in bad shape, replace it. I'd still <BR>
> flush out the tank in this case too. <BR>
> <BR>
> _A <BR>
> HREF="http://www.heatinghelp.com/getListed.cfm?id= <BR>
> 367&Step=30"_To Learn More About This <BR>
> Professional, Click Here to Visit Their Ad in <BR>
> "Find A Professional"_/A_ <BR>
<BR>
Is there a particular style or type of check valve to replace it with? I assume that one criteria would be one that would tolerate high temperatures another would be a tight seal on shut down. Do you have any recommendations?

Direwolf35

Check Valve On Steam Boiler Condensate Pump

McDonnell Miller 150 MD cycling condensate pump on and off in 3 min increments with no call for steam. I turn off power to to 150 MD and level drops to Hartford loop inlet. Sounds like a check valve to me. (Great Info on this site about this issue!!!) Is it Better to replace the check valve then to clean It? I wasn't sure of life expectancy of the check valve. I know condensate pump hasn't been serviced in years.
(Thank you for all your help)
HVAC Contractor in CT.

Steamhead (in transit)

Take it apart

and see if there's something caught in it. If it is, that's the problem- and it would be a good idea to flush the receiver tank out too.

If the check is in bad shape, replace it. I'd still flush out the tank in this case too.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Brad White_9

Any good bronze clapper type

check valve should be fine. Horizontal pattern, installed in horizontal, not vertical, before the rise. If installed in the vertical, back-flow will allow settling of debris on the seat.. a drain valve for the leg downstream of the check (at the base of the rise) is a good feature to install to drain and flush.

The vertical soft-seated checks tend to have smaller openings where things can get caught (the cross arm into which the stem shaft and spring floats specifically). Crane, Walworth, Milwaukee, all good.

Patrick Linhardt, \"Linhardt's Field Guide to Ste

teflon seat

All good advise. A horizontal brass valve with a teflon check has worked quite well in our area since people switched over to it many years ago. The sales rep pitched its features and the contractors like it. Milwaukee makes a nice one, their model #510-T.

Best regards, Pat

Direwolf35

Thank you all for great advise.

Direwolf35

Hmmm I suppose I should mention that there are HW coils in this boiler and that there are two zone valves as well. At the time the boiler HW temp was about 180 degrees. I don't think this would affect operation of the check valve with no pressure reading on the gauge. Are there conditions other than the ones we mentioned to force a check valve not to hold?

Brad White

I see

no reason why the boiler in that no-pressure condition would make a perceptible difference. It just means less pressure for the pump to work against and at that is probably not much even when it is steaming.

I suspect crud under the seat or a worn seat or clapper.