Short Body Check Valve
Short Body Check Valve
(OP)
I need a 42 inch swing check valve for raw sewage service. Due to piping limitations, I am looking for a short body (such as wafer style) swing check valve for sewage application. Full size check valve won't fit. Any suggestions (make and model)?





RE: Short Body Check Valve
Standard swing check valves for this size in wafer comfiguration (or short bodies) will be difficult to source, of course, if you pay enough, you will find someone willing to make it for you (dont know about lead times though).
Possible options are:
Combined check valve (offset butterfly style, with counter-force).
Dual disc check valve.
Both would probably be available in short body, double flanged.
Hope this can assist.
Ciao,
RE: Short Body Check Valve
There is a third possibillity: to use a motorized knife-gate on/off valve if you are near a pumping station or an electrical outlet.
This will need time to close and will not protect you by power failure.
If you are considering this you will have to check consequences of pressure peaks if you are pumping and the pumps closes down suddenly by power failure.
You will also have to consider UPS if you need protection by power failure.
RE: Short Body Check Valve
RE: Short Body Check Valve
Hope this solves the problem, or at least points you in the right direction.
Ciao,
RE: Short Body Check Valve
One of the problems with swing-check 'dog type trap door construction' valves with wafer type building length is that they will be reduced bore and be limited in opening (bang agains pipeline 'roof'.
Better is as mentioned before doble 'butterfly' check valves, or as mentioned perhap double eccentric single butterfly with counterwieight and perhaps dampening cylinder.
This will be the nearest you can come a full opening with a short building length. I do not know of any other construction giving you what you want with a short building lkength.
RE: Short Body Check Valve
Is there anyone who have used this valve (Bray Checkrite)in raw sewage pumping stations?
I believe the double door (butterfly type) check valve is not designed to be used for sewage service. So, I am hesitant to try it unless the manufacturer would provide assurance.
A Cv value of approximately 30000 for the 42 inch check valve would suffice my needs. Normal full body check valve would have Cv value of over 40000.
RE: Short Body Check Valve
RE: Short Body Check Valve
I am still looking for user references based on the short body wafer style swing check valve.
RE: Short Body Check Valve
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RE: Short Body Check Valve
RE: Short Body Check Valve
Yes, reorienting the pump is an option, but it needs a lot of extra costly piping modifications, which we want to avoid if possible.
RE: Short Body Check Valve
RE: Short Body Check Valve
RE: Short Body Check Valve