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 Post subject: GGDT Valve Data...
 Post Posted: Thu Jul 17, 2003 3:00 pm 
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Originaly posted by PCGUY112887,
Doe anyone happen to have a good guess on what I should fill out under the valve section of GGDT for a 1" Wantermaster In-Line Sprinkler Valve?


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 Post subject: 1" Sprinkler valve
 Post Posted: Thu Jul 17, 2003 5:00 pm 
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Originaly posted by mta,
TheHall's formula says a Cv of 7.5 for a 1" valve. In real life it's less. Andeh says Cv = 5.8. That's probably not too far off. Generic valve, Cv = 5.8 open/close time = 10 ms, dwell time = 1000 ms. That will put you in the ball park.


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 Post subject: ya think this is good?
 Post Posted: Thu Jul 17, 2003 7:00 pm 
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Originaly posted by PCGUY112887,
I didn't know what to use for Friction or Initial Position, so does anyone mind telling me about what I should put. I didn't know if Position was from the valve, or from the end of the barrel. And as far as friction goes, I have no clue.



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 Post subject: Initial position
 Post Posted: Thu Jul 17, 2003 8:00 pm 
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Originaly posted by Rocketbiker,
I believe the initial position refers to the starting point in the 46 inch barrel, which technically would be around 1.2" if you're using a sphere such as a tennis ball, but I usually just put zero. I'm assuming you're using TB's judging by the barrel size and mass, if you are I think your friction may be a little low. I was told to use .5 for marbles that rolled freely. I've never used TB's before but if they don't roll freely all the way down I'd bump up the friction level a point or two. Maybe someone else can help a little more there.


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 Post Posted: Thu Jul 17, 2003 9:00 pm 
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Originaly posted by Namor,
the valve....so if you have elbows for overunder configuration, that area needs to be counted in as the barrel and should be added to position as well....


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