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Thread: Sporlan EF Series TXV Question

  1. #1
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    Sporlan EF Series TXV Question

    To make a long story short I have a 1/2 ton Sporlan EFSE TXV on a Norlake remote W/I/C. Headmaster diaphragm seems to be ruptured or possibly leaked the N2 (but I dont see any cracks or rubbs). Slapped on a fan cycler to get up and running but going back to cut out the valve in the morning to avoid any further incident.

    Reading Sporlan 10-10 theres no mention of whether EF and F series valves are balanced port. Theres alsolso no mention that they are not balanced port. I assume they arent based on my running pressures earlier but am not sure. Think it could also possibly be sticking. Good chance to give it a second look tomorrow morning.

    If they are not balanced port I will rebuild with a Q body 1/2 ton out of my kit. Sorry for a stupid question but I'm sure one of you can shoot me straight. Please just dont ask why I'm not replacing the bad headmaster, not my call to make.

    Thanks in advance for your time on a chilly Friday night.

    Sent from my SAMSUNG-SM-G891A using Tapatalk

  2. #2
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    I can't remember whether they are, or whether they are not balanced port.

    But I am more curious why you are asking the question. More to the point, do you know what a balanced port TEV does, why it is called that, or why it is used in some applications and not others?
    I do a triple evac with nitro to remove non condensables.

  3. #3
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    Not balanced port.

    If you're not going to have a functional head pressure control - I would go with a balanced port valve.

    Sent from my Moto Z (2) using Tapatalk

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    Quote Originally Posted by shellkamp View Post
    Not balanced port.

    If you're not going to have a functional head pressure control - I would go with a balanced port valve.

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    Thanks shellkamp. Will go ahead with the Sporlan Q.

    Sent from my SAMSUNG-SM-G891A using Tapatalk

  5. #5
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    Shouldn’t you be using a bq body?
    Honeywell you can buy better but you cant pay more

    I told my wife when i die to sell my fishing stuff for what its worth not what i told her i paid for it

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    Quote Originally Posted by BBeerme View Post
    I can't remember whether they are, or whether they are not balanced port.

    But I am more curious why you are asking the question. More to the point, do you know what a balanced port TEV does, why it is called that, or why it is used in some applications and not others?
    Trying to eliminate/mitigate the 10-20# swing in suction pressure after the fan condenser fan cycles off and my head pressure starts to build. I wouldn't imagine a system with a headmaster would necessarily need balanced port due to the steady head pressure.

    Sent from my SAMSUNG-SM-G891A using Tapatalk

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    Quote Originally Posted by crazzycajun View Post
    Shouldn’t you be using a bq body?
    Yes, he should be. The Q bodies are not balanced port.

    Sent from my Moto Z (2) using Tapatalk

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    Quote Originally Posted by crazzycajun View Post
    Shouldn’t you be using a bq body?
    Believe it will be BQE or EBQE.

    Sent from my SAMSUNG-SM-G891A using Tapatalk

  9. #9
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    Thanks gentlemen.

    Sent from my SAMSUNG-SM-G891A using Tapatalk

  10. #10
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    That is not what the balanced port valve is for, or designed to do.


    Quote Originally Posted by Guyinfield View Post
    Trying to eliminate/mitigate the 10-20# swing in suction pressure after the fan condenser fan cycles off and my head pressure starts to build. I wouldn't imagine a system with a headmaster would necessarily need balanced port due to the steady head pressure.

    Sent from my SAMSUNG-SM-G891A using Tapatalk
    I do a triple evac with nitro to remove non condensables.

  11. #11
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    Quote Originally Posted by BBeerme View Post
    That is not what the balanced port valve is for, or designed to do.
    Enlighten me please.

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  12. #12
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    Balanced port valves are used when the load varies greatly; that's the simple explanation.

    Whether the head varies greatly, or remains constant, really has nothing to do with it. That is a different 'problem'.


    Quote Originally Posted by Guyinfield View Post
    Enlighten me please.

    Sent from my SAMSUNG-SM-G891A using Tapatalk
    I do a triple evac with nitro to remove non condensables.

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    Quote Originally Posted by BBeerme View Post
    Balanced port valves are used when the load varies greatly; that's the simple explanation.

    Whether the head varies greatly, or remains constant, really has nothing to do with it. That is a different 'problem'.
    Understood. Theoretically would the next best option be an EPR?

    Sent from my SAMSUNG-SM-G891A using Tapatalk

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    Quote Originally Posted by BBeerme View Post
    Balanced port valves are used when the load varies greatly; that's the simple explanation.

    Whether the head varies greatly, or remains constant, really has nothing to do with it. That is a different 'problem'.
    Excuse me. Trying to explain things to myself. Wouldn't the load drop off as the SST drops off? Basically the valve would stabilize the superheat regardless of the pressure bounce?

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    No. An EPR maintains a minimum evaporator pressure. It does not control the size of the load on the system.
    Quote Originally Posted by Guyinfield View Post
    Understood. Theoretically would the next best option be an EPR?

    Sent from my SAMSUNG-SM-G891A using Tapatalk
    Sent from my SM-G965W using Tapatalk

  16. #16
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    Not sure (can't remember) why you want to change the TEV (?).

    Gotta start dinner now . . .


    Quote Originally Posted by Guyinfield View Post
    Understood. Theoretically would the next best option be an EPR?

    Sent from my SAMSUNG-SM-G891A using Tapatalk
    I do a triple evac with nitro to remove non condensables.

  17. #17
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    Quote Originally Posted by BBeerme View Post
    Balanced port valves are used when the load varies greatly; that's the simple explanation.

    Whether the head varies greatly, or remains constant, really has nothing to do with it. That is a different 'problem'.
    It's to mitigate the liquid line pressure acting as an opening force on the valve.

    The head pressure varying greatly is the perfect reason to use it.

    Sent from my Moto Z (2) using Tapatalk

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    Quote Originally Posted by shellkamp View Post
    It's to mitigate the liquid line pressure acting as an opening force on the valve.

    The head pressure varying greatly is the perfect reason to use it.

    Sent from my Moto Z (2) using Tapatalk
    So would you set it up with or without a fan cycler?

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  20. #19
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    No fan cycle in these temperatures is gonna bottom out your liquid line temperature.
    Best practice is to replace the HPC to minimize hunting of the TEV.

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    Quote Originally Posted by VTP99 View Post
    No fan cycle in these temperatures is gonna bottom out your liquid line temperature.
    Best practice is to replace the HPC to minimize hunting of the TEV.
    As I mentioned originally that is what I recommended and the decision was taken out of my hands.

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