Sorry, not clear enough here without going into the other thread...
This is a 3"Ø swing check valve with a ½"x1" relief valve that appears to be mounted into the check via a threaded boss on the check valve body. I can't see much due to insulation. This is carrying -28°F liquid ammonia.
The P&ID shows the Relief Valve coming from the Check Valve. Symbol indicates Swing Check.
The attached photo shows the Relief coming off directly opposite the bolted cover.
It is a very short relief run, from Discharge directly to Suction line to Pump. Both Suction and Discharge are...
I'm not sure what the rules say about double posting, so I'm posting this link to a post I'm getting no nibbles on in the Valve Engineering section... Link .
It is about a Relief Valve threaded into the body of a Check Valve.
Anyone have any experience/knowledge to share?
Thanks,
David
I've come across a swing check in the discharge (vertical) of a Liquid Ammonia pump (-28°F) that has a relief valve coming out of the body of the check valve. Can't see exactly how/where due to insulation, but I expect it is coming out from a threaded boss on the check body. I assume it is on...
Ah... missed that Series A/B bit. If they ordered the valve as B16.47-A we'll be OK with the MSS SP-44 flanges, otherwise, we have to get B16.47-B flanges to match. Dimensions are a little different.
Now I have to find out just exactly what the client is getting after he ordered it as simply...
Are there expansion joints on the suction &/or discharge?
It could be thermal expansion of the piping attached, causing pump casing deflections leading to seal wear.
For large flanges (>24"Ø), I've always used B16.47. A question has arisen around here about dimensions for "ANSI" vs MSS dimensions. Seems a 30"Ø valve was ordered with 600# "ANSI" flanges. I'm thinking this means B16.47 since "ANSI" is now spelled "ASME".
So the question for the group here...
I need to be able to print (via VBA on a custom tool button) all sheets in a workbook, EXCEPT the first 2 sheets.
I can make it count the total number of sheets and tried to use:
Dim tabcount As Integer
tabcount = ThisWorkbook.Worksheets.Count
Worksheets(Array(2 - tabcount)).Select...
Loren at COADE/Intergraph set me back on the straight & narrow.
I forgot to go back and add the hanger loads (H) in the 2 HGR cases after changing one to a User Defined Hanger.
As usual, the longer it takes to figure out a computer problem, the more obvious the solution. :p
I posted this on the COADE site as well, but it's not even being read... not much traffic there right now I guess.
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Strange things going on with Springs...
I have a model with Weight Temperature Displacement + Wind. Plus Spring Hangers.
No Pressure...
Don't seem to be able to edit a post once it's up...
Forgot to add the Radiant Heat Loss in there. That would be duck soup as well if only we had that pesky Outside Surface Temperature.
In case anyone was thinking of taking a shortcut and "intuiting" that the outside surface temp of the...
Trouble is, this calls for an iterative solution.
Q = Delta T divide by Overall Thermal Resistance.
We have Tinside & Toutside for overall Delta T.
As for the Overall Thermal Resistance:
• We have enough to calculate Nusselt Number (inside) and get Convection Coefficient (inside)...
Thanks to Clyde32 and WMO both. Two ways to do something that I was afraid might have been impossible. [thumbsup2]
That's why I came in here to ask... I figured, if anyone would have already found a workaround, it would be someone on the engineering forum. :-)
That seems to be the ticket Clyde.
Looks like I'll need to add a dozen short Macros. I have two sheets like this with the two sets of three option buttons.
Still annoys me that I have to go to this much extra hassle to restore 'normal' operation to a previously slick workbook. I haven't even...
