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  #21  
Old 09-11-2010, 12:16 AM
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No Rush No Rush is offline
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Quote:
Originally Posted by Sprinkus View Post
Are you irrigating the whole park?
Are you going to use rotors that require 50 psi to operate?
Yes, the entire Park will be irrigated, the rotors only require 35 PSI.
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  #22  
Old 09-11-2010, 10:07 AM
Kiril Kiril is offline
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Quote:
Originally Posted by No Rush View Post
Update - the 1.5" irrigation meter is 518' from the 2" PVB with a 2" SCH. 40 main line connecting the two; the meter is connected to a 6' city water line most likely by 1.5" poly (that is what they use for water taps here). Now, I went out today and checked the static and dynamic water pressure at the PVB and took pictures. Here is what I got using two different gauges:
Static 1: 66 psi
Static 2: 68 psi
Dynamic 1: 56 psi
Dynamic 2: 56 psi
While running a zone I also opened the #2 test port on the PVB and the dynamic dropped just alittle more on both gauges to 52 psi.
Next I did all the same tests except i put the gauges on the #2 test port and the dynamic readings were lower 52 psi / 48 psi.
Now, I have designed the new system at 55 PSI (static); have a looped sch 40 2" main line with the PVB only about 1-3 feet from the meter. The rotors i am using only require 35 PSI to operate. From the readings at 518' away I should have plenty of water available. The largest zones are only running 35 GPM a zone.
The question still remains .... what is your dynamic pressure at your design flow (i.e. pressure at a flow rate of 35 GPM)?
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  #23  
Old 09-11-2010, 11:47 AM
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Maybe he can use drip pipe with compression fittings for better flow
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  #24  
Old 09-11-2010, 05:54 PM
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No Rush No Rush is offline
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Quote:
Originally Posted by Kiril View Post
The question still remains .... what is your dynamic pressure at your design flow (i.e. pressure at a flow rate of 35 GPM)?
Zone: 55 @ 35 (GPM)

Description: 1.5" Landscape Irrigation Meter
Type: Meter
Static Pressure: 55 (psi)
Service Line Loss: 0.172 (psi)
Meter Loss: 2.399 (psi)

Static Pressure: 55 (psi)
Service Line Loss: 0.17 (psi)
Meter Loss: 2.4 (psi)
Backflow Loss: 3 (psi)
Master Valve Loss: 0 (psi)

Valve Description: Hunter PGV-151 Globe
Mainline Loss: 2.335 (psi)
Valve Loss: 3 (psi)
Lateral Loss: 2.211 (psi)
Elevation: 0 (psi)
Sprinkler Requirement: 35 (psi)

Total Design Pressure: 48.117 (psi)
Residual Pressure: 6.883 (psi)
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  #25  
Old 09-11-2010, 07:58 PM
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FIMCO-MEISTER FIMCO-MEISTER is offline
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If it does turn out to be 68psi you will be in great shape for sure.
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  #26  
Old 09-11-2010, 09:05 PM
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hoskm01 hoskm01 is offline
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Out of morbid curiosity, what heads are you designing with/for?
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  #27  
Old 09-11-2010, 09:10 PM
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Hunter blue nozzles atop 8-foot posts
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  #28  
Old 09-11-2010, 11:56 PM
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Quote:
Originally Posted by hoskm01 View Post
Out of morbid curiosity, what heads are you designing with/for?
Hunter PGPs spaced at 25ft apart.

This park is in a VERY windy location right on the Texas Coast.
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  #29  
Old 09-11-2010, 11:57 PM
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Screams low angle nozzles.
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  #30  
Old 09-12-2010, 12:00 AM
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No Rush No Rush is offline
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Quote:
Originally Posted by Wet_Boots View Post
Hunter blue nozzles atop 8-foot posts
That was my orginal plan but, on twelve foot posts and let the wind do it's job. This city would probably buy it too.
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