Underground Valves
Underground Valves
(OP)
We are petrochemical operator, with little experience in underground buried valves for utility service--firewater, cooling water, potable water, process effluents, sewer, .... We found many of the exisitng U/G valves seized and inoperable. I need to spec out new replacement valves. Please advise what type/make are the performance proven U/G valves!
Eric
Eric





RE: Underground Valves
In the pipeline industry here, we try to bring our valves up to the surface via risers.
When we bury valvs, we try to use a "vertical culvert" or "well" down to the burried line such that the valve is still "burried", but not sitting in the dirt or water.
I agree, direct burial is problematic.
RE: Underground Valves
gate valves AWWA C500
butterfly valves AWWA C504
epoxy coating AWWA C550
use a valve box with a debris cap for the operator
RE: Underground Valves
Can you describe what a "valve box" and "debris cap for the operator" in more detail? I am not familiar with those terms.
Thanks.
RE: Underground Valves
you can see details of a typical installation if you download the following standard drawings. look at details 391 and 392
http://www.mag.maricopa.gov/detail.cms?item=4774
RE: Underground Valves
Thank you for the link. I believe we are talking about the same thing.
Our wells/culverts are usually made of galvanised corrugated sheet metal, sunk into the ground around the valve and actuator, extending about 12"-18" above grade, 5'-6' in diameter, ladder access in some instances, and with a lid to keep stuff/people out.
RE: Underground Valves
http:/
KRB
RE: Underground Valves
The input summary for U/G valve:
* use 'vertical culvert','well' or 'valve box' to contain and keep valves from the dirt and water.
* use AWWA, rubber-lined valves.
* stroke U/G valves regularly to ensure they are operable.
Thanks again!
Eric