Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

valve for protecting drain system

Status
Not open for further replies.

blueant

Mechanical
Joined
Oct 30, 2005
Messages
2
Location
US
Does anyone know of a simple valve that is normally open to allow water to flow (like a drain) but closes when there is a sudden increase of pressure.
 
None that can be used as a safety barrierer

Best regards

Morten
 
Some manufacturers make "excess flow check" valves that are lightly spring loaded open but are forced shut by the process if the differential pressure from the flow through them exceeds a certain value. This may or may not correspond to your pressure surge.

A conventional pressure reducing valve (regulator) is wide-open until the downstream pressure exceeds its setpoint, then it closes. A "good" regulator has a very narrow proportional band.
 
Thanks for the ideas. I'm going to look in to the "lineflow.com" valve.
 
I think a regulator is your best bet. For a set pressure greater than the operating pressure then the valve could be full open depending on the pressure margin.

If you have to protect the downstream piping from overpressure then use two regulators in series (monitor setup).

My suggestion is based on the assumption that the drain line is a smaller diameter like 2", 3" or smaller.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top