CSV (Cycle Stop Valve) or VSD (Variable Speed Drive)

Discussion in 'Open Loop' started by llaforest, Oct 3, 2013.

  1. llaforest

    llaforest Member

    I've been reading on both of them. Both say that the other solution will not last 5 years!!

    Is there anybody with bad experiences with CSV here?
    Is there anybody with bad experiences with VSD here?

    From the beginning we were scared a 3 phase motor drive will be sensible elctronic subject to failures...
    But does having the pump fight against a closed valve is better? Does it really shuts the consumed current?

    I will run some test with our water pump while I close the main valve this weekend but if anyone has a comment, they are more than welcome!

    Cheers!
    Laurence.
     
  2. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    VSD / VFD hands down.

    Our world is chock full of sensitive electronics subject to failure...take appropriate precautions.
     
  3. Calladrilling

    Calladrilling Member Industry Professional Forum Leader

    You shutting your main valve will do nothing to the pump, since the main valve should be after the storage tank ( outlet side).
    A shut off valve on the inlet side of your storage tank would be a MISTAKE on the installers part.
    In your case I would refer to the CSV since you currently are running a constant speed pump already. Just install the CSV and get all the life out of your pump that you can. When the pump finally fails then I would switch to a Grundfos if it will satisfiy the needs of your GPM your upgrading to.
    A CSV never fully closes either, it will always allow some water past the valve to eliminate complete dead heading, and keep the pump cool.
    A VFD is my personal favorite way to control a pump. Anything 2HP and up we use SJE-Rhombus for commercial work. Anything 1.5hp and under I prefer the Grundfos SQE line.
    I have personally have had excellent success with Grundfos when installed correctly with the correct head pressures and pump curves.
    BEST OF LUCK!!!
    Dan
     
  4. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    .........(i'm just ducking in case Eric throws something)..........
     
  5. waterpirate

    waterpirate Well-Known Member Industry Professional Forum Leader

    Didn't you hear? I am in a 12 step program to help me with my ( volunteer fire dept vs. current shopping values ) issues.
    Message is coded so I am not attacked by net searching drone bots. lol
    Eric
     
  6. waterpirate

    waterpirate Well-Known Member Industry Professional Forum Leader

    Please stop stalking me, it is getting creepy.

    Sugestions:
    ignore me, like I ignore you
    spend less time fixated on me and your mouthpiece, and focus on your family and positive things. your life will greatly improve.

    I talked with you on the phone several years ago and agreed that anything as negative as what was posted here, prolly was not good for any ones business. I edited out all the emotion on all those threads after that discussion. Still not enough for you? Seek counsling from your spiritual advisor. Grow a thicker skin and be happy :).
     

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  7. llaforest

    llaforest Member

    Something is going on here.... o_O
     
  8. Palace GeoThermal

    Palace GeoThermal Well-Known Member Industry Professional Forum Leader

    I am speechless :confused::confused:
     
  9. llaforest

    llaforest Member

    Wow I didn't know all of it was a taboo!

    I'm mostly new here and I would not have believe world was so small! Anyway, since for the first year we will run with our old single speed 15gpm pump, I will start without CSV and monitor, then I will install the CSV and monitor.

    I could run some tests this weekend and current drops when I shut the valve, of course it doesn't mean it's all good but it still means that the pump works less... My vacuum does the same when I block the air, only if no air passes the motor overheat... I know that's why the pump always keep minimal flow...

    The concept is very counter intuitive but it doesn't mean it's crazy. Anyhow it's only a 100$ test and I risk only my 30 years old pump... ;)

    Thanks for the cues!
    Laurence.
     
  10. Calladrilling

    Calladrilling Member Industry Professional Forum Leader

    How the hell did I get brought into this?
    I believe I was the person who recommended the CSV to him to use...
    Let me clear this up for everybody.. My opinion is as follows.
    1. If you want constant pressure from your well system get a variable speed motor.
    2. It you currently have a constant speed motor and want to convert to a constant pressure system without replacing the pump....then CSV is the cure.
    3. I always suggest the variable speed motors over a CSV when constant pressure is sought after. But if the economics do not pay to convert the pump then the CSV is the next best thing. IN MY OPINION
     
  11. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    I had a similar note once upon a time from a ship and forget company.

    But now that you said this Eric:

    "Didn't you hear? I am in a 12 step program to help me with my ( volunteer fire dept vs. current shopping values ) issues.
    Message is coded so I am not attacked by net searching drone bots. lol"

    I can see why the attorney card was played..........o_O
     
  12. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    Sure would appreciate some light on the weirdness above...at least a PM!
     
  13. waterpirate

    waterpirate Well-Known Member Industry Professional Forum Leader

    Curt, did you read that atachment? That about sums it up.
    I have been meaning to get up with you. A friend needs to open up a dialogue about geo on the westcoast of FLA. PM me your contact info and I will pass it along to him. His favorite adult bevrage is a porter called " Edmund Fitzgerald " really good stuff, smuggled in from north east, and he shares well with others.
    Eric
     
  14. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    Yikes, Edmund Fitz would boarder on sacreligious in MI.
     
  15. waterpirate

    waterpirate Well-Known Member Industry Professional Forum Leader

    I guess that the picture of the ill fated vessel on the label is not helping either?
     
  16. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    Ah, didn't read the attachment to know that the Comma-Separated-Variable ant pile got kicked open again.

    Someday I'll wrap my mind around CSV and reach a conclusion, but with VFDs getting better and cheaper by the day the issue may become sidelined soon.

    At any rate, I'm no big fan of beers I can't see through, but love a good IPA...the craft beer tent is big enough for a wide variety of preferences. The wreck of the Edmund Fitzgerald is a decades-long favorite. I've been a small craft mariner since the 70s, sworn in 1999 and am occasionally called out into snotty weather to bring someone home, figure out who erred in a boating accident or cage a drunk for the night.

    I'm up for sharing thoughts about left coast Florida geo. We swapped a half dozen messages in early 11. If you still have the nopixel yahoo address you'll hear from me via it soon.
     

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