Wastewater 60" Force Main Valves
Wastewater 60" Force Main Valves
(OP)
I'm designing an influent 60" diameter emergency force main that operates at 28 psi for a wastewater treatment plant. 40 psi is the specified operating pressure. It will tie in to a 60" section of an existing force main.
A 60X60 tee will be installed where the new line will be connected. The present consideration is to install gate valves at the upstream side of the mainstream section of the tee and at the tee. Plug and ball valves are being considered. Suggestions will be appreciated. Is there a 60" three-way ball or plug valve that can handle this function?
The flow will contain a lot of grit and trash.
A 60X60 tee will be installed where the new line will be connected. The present consideration is to install gate valves at the upstream side of the mainstream section of the tee and at the tee. Plug and ball valves are being considered. Suggestions will be appreciated. Is there a 60" three-way ball or plug valve that can handle this function?
The flow will contain a lot of grit and trash.





RE: Wastewater 60" Force Main Valves
If there is a lot of grid and trash, a wedge gate may get gunk in the seat. You may want to look at a slab gate (through conduit gate) or ball.
At 60", a slab gate will be very expensive, so, maybe a ball? Probably very expensive also.
Not sure if I helped. Hope I did.
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
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RE: Wastewater 60" Force Main Valves
RE: Wastewater 60" Force Main Valves
Geoffrey D Stone FIMechE C.Eng;FIEust CP Eng
www.waterhammer.bigblog.com.au
RE: Wastewater 60" Force Main Valves
http://www.prattvalves.com/products/
RE: Wastewater 60" Force Main Valves
I can tell you that ordering a special 3way valve in 60" will cost a lot more that a gate and a T. Not sure who you have your pipe from, but American Cast Iron got us our 64" T's pretty fast.
Also, from the description you gave I am getting the impresion that the line is not used very often. Have you considered using a rotary check valve? You can set the opening pressure and the cost would be less because there are a lot fewer controls.
RE: Wastewater 60" Force Main Valves
RE: Wastewater 60" Force Main Valves
Geoffrey D Stone FIMechE C.Eng;FIEust CP Eng
www.waterhammer.bigblog.com.au
RE: Wastewater 60" Force Main Valves
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Wastewater 60" Force Main Valves
RE: Wastewater 60" Force Main Valves
You mean like pneumatically with instrument air?
http://www.sur-flo.net/fcontrol.pdf
Here is an example of a pinch valve, and control.
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Wastewater 60" Force Main Valves
Thanks for the resource. I have an application where this might come in handy.
Somany,
How were planning to actuate the valve?
RE: Wastewater 60" Force Main Valves
I am not sure what you are asking. Can you try asking it again in a different way?
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Wastewater 60" Force Main Valves
Somany initially stated that the current application is using gate valves. I was wondering how they are currently being actuated?
Thanks
RE: Wastewater 60" Force Main Valves
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Wastewater 60" Force Main Valves
I believe a tee and two valves are more reliable ad less expensive.
aticooper (Mechanical) 5 Jun 06 15:17
"Somany,
How were planning to actuate the valve?"
With Auma electronic actuators. Two valves will be fully open/closed. One valve will be used infrequnetly to throttle influent.
aticooper (Mechanical) 5 Jun 06 16:06
"Ashereng,
Somany initially stated that the current application is using gate valves. I was wondering how they are currently being actuated?"
This line is in design phase.