pressure regulator reducer failure

Discussion in 'Irrigation / Sprinkler Forum' started by raldem7, Apr 20, 2014.

  1. raldem7

    raldem7 New Member

    Joined:
    Apr 20, 2014
    Location:
    TN
    I am looking for a replacement pressure regulator for a drip system to maintain 20-28 psi (30psi max). I've read that PRVs do not necessarily fail to a limiting pressure. My system is limited by the goof plugs (rated at 30 psi max). Can anyone recommend a regulator that is unlikely to fail to a high pressure (>30 psi)? I am currently spending ~$8 per PRV and would spend considerable more for higher confidence. My supply pressure ranges from 40-70 psi. Thanks for any recommendations.

    Ralph
     
  2. DonL

    DonL Jack of all trades Master of one

    Joined:
    Mar 30, 2011
    Occupation:
    Rocket Scientist
    Location:
    Houston, TX
  3. Sponsor

    Sponsor Paid Advertisement

     
  4. valveman

    valveman Moderator Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    Any pressure regulator will have “creep”. This means it will let the pressure “creep” through until the pressure on both sides equalizes. A small expansion tank on the discharge side of the PRV will make it take a long time to increase the pressure. Without an expansion tank the PRV only has to “creep” by a thimble full of water to overpressure the system. You could also use a pressure relief valve after the PRV, but I think the little tank is best.
     
  5. DonL

    DonL Jack of all trades Master of one

    Joined:
    Mar 30, 2011
    Occupation:
    Rocket Scientist
    Location:
    Houston, TX
    The regulator should not creep on a drip system because the output should always have some flow, because it is always open.

    If it can creep then the flow of the system needs some adjustment, or the control valves need to be relocated.


    Maybe I missed something.
     
  6. valveman

    valveman Moderator Staff Member

    Joined:
    Mar 15, 2006
    Occupation:
    Pump Controls Technician
    Location:
    Lubbock, Texas
    There should be an electric solenoid valve between the drip lines and the pressure regulator. The drip lines are not always open. When the electric valves are closed, the pressure will eventually equalize on both sides of the pressure reducer valve. That is unless the solenoid valves “creep” as much as the pressure reducing valve.
     
  7. DonL

    DonL Jack of all trades Master of one

    Joined:
    Mar 30, 2011
    Occupation:
    Rocket Scientist
    Location:
    Houston, TX

    Exactly.

    I guess I don't get the problem.


    Carry on.
     
Similar Threads: pressure regulator
Forum Title Date
Irrigation / Sprinkler Forum Nozzle that provides nozzle head coverage - and pressure regulator Sep 29, 2011
Irrigation / Sprinkler Forum Low pressure May 23, 2015
Irrigation / Sprinkler Forum Pressure vacuum breaker backflow prevent or always engaging May 21, 2015
Irrigation / Sprinkler Forum Brass vs. plastic pressure reducing valve Apr 29, 2015
Irrigation / Sprinkler Forum Advice on locating Reduced Pressure Backflow Assembly in my Basement Jan 16, 2015

Share This Page