Any irrigation folks here?
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Joined: Feb 2005
Posts: 5,211
axiomite
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OP
axiomite
Joined: Feb 2005
Posts: 5,211 |
I know this is a long shot asking here but does anybody know if the hydraulic valve downside of the pump is still needed if changing the system from the older manual indexing manifold to solenoid valves on a spring well system?
My source of information is out of town for the week and my luck ran out with google.
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Re: Any irrigation folks here?
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Joined: Nov 2006
Posts: 1,333
connoisseur
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connoisseur
Joined: Nov 2006
Posts: 1,333 |
If the hydraulic valve is part of the pump/ballast tank system, then yes you should still need it. If the hyd valve is part of your manual indexing manifold, then you shouldn't. It should be a direct replacement.
Scott
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Re: Any irrigation folks here?
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Joined: Jan 2004
Posts: 13,848 Likes: 14
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,848 Likes: 14 |
dang it Scott, exactly what I was going to say.
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: Any irrigation folks here?
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Joined: Nov 2006
Posts: 1,333
connoisseur
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connoisseur
Joined: Nov 2006
Posts: 1,333 |
Sorry, Randy. Great minds and all...
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Re: Any irrigation folks here?
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Joined: Feb 2005
Posts: 5,211
axiomite
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OP
axiomite
Joined: Feb 2005
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Scott our system does not have a ballast tank, the flow well is plumbed directly to the pump and the independent hydraulic valve is plumbed just on the output side of the pump prior to the current manual indexing valve so that the flow well will not free flow to and out of the sprinkler heads while not operating. I'm thinking with the new solenoid valves there will not be a need for the hydraulic valve because the solenoid valves (in my mind) will have a positive shutoff while not in operation?
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Re: Any irrigation folks here?
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Joined: Nov 2006
Posts: 1,333
connoisseur
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connoisseur
Joined: Nov 2006
Posts: 1,333 |
Brother Bob,
If the hydraulic valve is self-actuating, so to speak, as a function of reduced downstream pressure, then the solenoid valves would be a replacement in kind and therefore not needed.
If the actuation of the hydraulic valve tells the pump to turn on, then it would still be needed... Unless you tie the solenoid signal to the pump switch.
I guess as with speakers, a picture or diagram would go a long way. You wouldn't happen to have a P&ID drawn up, would you?
Scott
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Re: Any irrigation folks here?
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Joined: Feb 2005
Posts: 5,211
axiomite
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OP
axiomite
Joined: Feb 2005
Posts: 5,211 |
If the hydraulic valve is self-actuating, so to speak, as a function of reduced downstream pressure, then the solenoid valves would be a replacement in kind and therefore not needed
Scott
That's exactly what the hydraulic valve is being used for and I also did not believe it would be needed with the new solenoid valves installed. I'll scramble up a picture ... give me a few minutes.
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Re: Any irrigation folks here?
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Joined: Nov 2006
Posts: 1,333
connoisseur
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connoisseur
Joined: Nov 2006
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Hmmmm. The more I think about this... Most irrigation solenoids use line pressure (high) on a diaphragm to close the valve. If the pressure in the water line drops to well pressure (low) when the pump turns off, that may not be enough to keep the irr valve closed. Keeping the hyd valve in the system may lock in the line pressure between it and the solenoid and keep the irr valve closed? Does that make sense to you?
Gotta run out for dinner and some shopping. I'll check in later.
Scott
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Re: Any irrigation folks here?
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Joined: Feb 2005
Posts: 5,211
axiomite
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OP
axiomite
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Here we go. Top photo shows the existing setup with the hydraulic valve on the output side of the pump between the pump and the filter and on out to the old manual indexing valve. Second photo shows the solenoid valves and manifold that will replace the old indexing valve. I'm thinking with the addition of the solenoid valves I can eliminate the hydraulic valve?
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Re: Any irrigation folks here?
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Joined: Feb 2005
Posts: 5,211
axiomite
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OP
axiomite
Joined: Feb 2005
Posts: 5,211 |
Hmmmm. The more I think about this... Most irrigation solenoids use line pressure (high) on a diaphragm to close the valve. If the pressure in the water line drops to well pressure (low) when the pump turns off, that may not be enough to keep the irr valve closed. Keeping the hyd valve in the system may lock in the line pressure between it and the solenoid and keep the irr valve closed? Does that make sense to you?
Gotta run out for dinner and some shopping. I'll check in later.
Scott I understand what you are saying, I just wasn't aware exactly how the solenoid valves work. Have a good night out, we'll catch you tomorrow.
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