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ChExpress Blog - 10/15/14

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Thermal Relief Valve Orifice Area


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#1 K.Sandeep

K.Sandeep

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Posted 31 January 2009 - 04:36 PM

Hello all smile.gif

What is the orifice area of a thermal relief valve (3/4" x 1")? I found that there is no valve of 3/4" x 1 " size and corresponding orifice area mentioned in the tables in API 526. I have seen in some of the engineering specification of thermal relief valves wherein orifice area was mentioned as 0.11 inch2 which corresponds to " D" type orifice in API 526 Tables. Is that correct? Please guide me.

Also, is there any possibility that thermal relief valve is different than 3/4 " x 1"? is every 3/4" x 1" valve is a thermal relief valve?

#2 JoeWong

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Posted 02 February 2009 - 09:54 AM

3/4" x 1 " RV (non API 526 standard) is used widely. It can be "D" type or even bigger.

Check this




#3 K.Sandeep

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Posted 02 February 2009 - 09:16 PM

QUOTE (JoeWong @ Feb 2 2009, 09:24 PM) <{POST_SNAPBACK}>
3/4" x 1 " RV (non API 526 standard) is used widely. It can be "D" type or even bigger.

Check this


Thank you very much JoeWong.
I appreciate your help on this.






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