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asker

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Wednesday, June 14th 2017, 7:25pm

Valve Sizing Max

Hello,

Valve sizing question...

For example Hunter 1" ICV is supposed to handle up to 40 gpm.

so lets say you have a 1" meter water company says can deliver up to 50 gpm.

You are using 2 1/2" sch 40 mainline (this is an imaginary example). You want 30 gpm delivered. You have lots of pressure. Friction loss is not a problem.

It should work just fine right?

How is it you can push up to 40 gpm through a 1" valve?

Or am I all wet?

BackflowInspector

Supreme Member

Posts: 471

Location: Houston, Texas

2

Thursday, June 15th 2017, 11:55am

I don't have the charts of friction loss in front of me, but generally there guidelines most irrigation designers use.
When I design, I generally use 1" up to 20 or 22 GPM, 20 to 40 GPM 1.5", 40-Plus 2" valve.

The Higher flow and pressure through the valve can cause it to have problems over time, and of course there is pressure loss to think about.

You want to use the right valve for the right job.

:thumbsup:
:thumbup: :thumbsup:
LI0006121, BPAT0011021, CI0009500

asker

Starting Member

3

Friday, June 16th 2017, 5:08pm

Thanks BackflowInspector

It would be pretty rough on the valve. 11 fps through the valve?

BackflowInspector

Supreme Member

Posts: 471

Location: Houston, Texas

4

Saturday, June 17th 2017, 1:58pm

:thumbup:
:thumbup: :thumbsup:
LI0006121, BPAT0011021, CI0009500

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