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http://indianaquariumhobbyist.com/community/ :: View topic - Query on Solenoid valve
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Query on Solenoid valve

 
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nskumar
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PostPosted: Mon Mar 11, 2013 10:29 am Post subject: Query on Solenoid valve Reply with quote

 Dear  Members,
 
 I  am  facing  a  different  kind  of  problem  on  my  Co2  setup  where  I  want  a  solution  for  this.
 
 My  inlet  pressure  shows  between  800  to  900  PSI  and  my  outlet  pressure  is  set  to  2Kg/Cm2.   I  set  one  bubble  per  3  seconds.
 
 I've  checked  for  leaks  and  there  are  no  leaks  found.  My  problem  is  after  switching  off  solenoid  valve,  I'm  able  to  see  Co2
 
 coming  out  and  going  into  the  diffuser  @  one  bubble  per  10  seconds.  I  believe  solenoid  valve  is  used  to  cut  off  Co2  completely  
 
 when  it  is  switched  off.  In  my  case  it  is  not  happening  as  per  rule.  During  day  time  it  is  constant  at  one  bubble  per  3  seconds.
 
 What  is  wrong  with  my  solenoid  valve?  Has  anyone  faced  this  sort  of  problem  on  your  Co2  setup.  Experts  please  help  me  to
 
 resolve  this  issue.
 
 Thanks  in  advance.
 
 Regards,
 Senthil
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kbharanikumar
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PostPosted: Mon Mar 11, 2013 11:10 am Post subject: Re: Query on Solenoid valve Reply with quote

 Look  like  solenoid  valve  is  not  working
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nskumar
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PostPosted: Thu Mar 14, 2013 9:15 am Post subject: Re: Query on Solenoid valve Reply with quote

 Now  it  shuts  off  during  night  properly.  But  again  in  the  morning  Co2  is  not  getting  diffused  in  the  tank.
 
 I  need  to  manually  adjust  the  needle  valve  to  release  Co2  and  once  this  is  done  it  is  normal.
 
 What  is  wrong  with  my  Solenoid  valve  or  is  this  a  problem  with  needle  valve
 
 Please  help  me  to  resolve  this  issue.
 
 I  arranged  my  Co2  setup  this  way
 
 Cylinder  ->  Regulator  ->  Non  Return  Valve  ->  Solenoid  Valve  ->  Flow  Control  Valve  ->  Needle  Valve
 
 -Senthil
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abhishekls
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PostPosted: Thu Mar 14, 2013 11:28 am Post subject: Re: Query on Solenoid valve Reply with quote

 Hey  Senthil,
 
 Move  the  non  return  valve...  betwee  the  needle  valve  and  the  diffuser.
 
 what  kind  of  solenoid  you  have,  the  round  ones  are  not  that  good.  the  square/rectangle  ones  are  good.
 Check  your  solenoid....  sometimes,  if  something  is  stuck  inside  it,  it  still  leaks  after  switching  off.
 
 The  way  I  do  it  is...  I  release  pressure  from  cylinder,  then  use  the  key  to  increase  desired  outflow  pressure,  while  my  flow  control  is  completely  shut
 Then  adjust/needle  valve  or  the  flow  control  for  bubbles.
 
 The  watch  your  pressure  guage  for  sometime...  if  it  drops  either  there  is  a  leak,  or  you  need  to  release  more  co2
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abhip29
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PostPosted: Thu Mar 14, 2013 11:41 am Post subject: Re: Query on Solenoid valve Reply with quote

 As  you've  mentioned  1  bubble  per  3  seconds,  the  amount  of  Co2  &  the  pressure  going  to  diffuser  is  considerably  low.  
 
 Considering  my  example,  I've  set  the  Co2  flow  at  1  bubble  per  second  &  it  takes  atleast  2  mins  for  the  CO2  to  flow  out  from  the  diffuser  once  the  solenoid  valve  is  switched  ON.  I  guess  this  is  due  to  the  water  pressure  built  up  in  the  diffuser.
 
 So,  1  bubble  per  3  seconds  might  take  a  bit  more  time  I  believe.
 Also,  it  depends  upon  the  placement  of  check  valve  &  the  length  of  the  tube.
 
 Regards,
 ABHILASH
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zico_aqua
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PostPosted: Thu Mar 14, 2013 3:05 pm Post subject: Re: Query on Solenoid valve Reply with quote

 IMO  -  the  solenoid  may  shut  off  but  the  pressure  present  in  the  PU  tube  is  still  there..it  happens  for  all!  it  will  bubble  for  sometime  but  will  fade  in  time,  happens  with  me  as  well.  as  for  the  adjustment  in  the  morning  -  it's  again  the  same  the  pressure  might  be  in  your  reg,  but  your  PU  tube  is  devoid  of  pressure  by  morning  and  it  will  take  time  max  15-20  mins  to  be  up  and  running  again.  so  chill  it's  perfectly  fine.
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nbj12345
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PostPosted: Thu Mar 14, 2013 4:33 pm Post subject: Re: Query on Solenoid valve Reply with quote

 @Abhradip  
 
 I  too  have  faced  the  same  problem  
 even  though  my  solenoid  valve  is  turned  off  the  bubbles  in  the  co2  diffuser  continue  
 Initially  i  also  thought  that  it  might  be  the  pressure  in  the  PU  tubes  but  those  bubbles  would  last  for  more  than  an  hour  after  turning  off  the  solenoid  then  i  had  to  turn  off  the  output  at  the  regulator  everytime
 
 What  are  your  opinions  about  it
 
 My  solenoid  is  the  Airmax  square  type  
 now  i  have  removed  the  solenoid  itself  and  manually  turning  the  CO2  on  and  off  everyday,  that  is  Pain....
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zico_aqua
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PostPosted: Thu Mar 14, 2013 8:47 pm Post subject: Re: Query on Solenoid valve Reply with quote

 mine  run  for  approximately  1.5  hrs  after  the  solenoid  goes  out..but  by  the  time  they  go  off  the  tank  is  already  oxygen  laden  with  plants  having  completed  their  photo  cycle  for  the  day  so  it  hardly  makes  a  difference.
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nbj12345
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PostPosted: Fri Mar 15, 2013 12:22 am Post subject: Re: Query on Solenoid valve Reply with quote

 ok  so  its  fine  if  it  lasts  for  an  hour  or  so  after  turning  the  solenoid  off  ....
 
 in  my  tank  also  plants  are  also  pearling  by  the  time  i  turn  off  the  solenoid  
 
 Thanks  Abhradip   Thumb Up   Very Happy
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nskumar
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PostPosted: Fri Mar 15, 2013 8:19 am Post subject: Re: Query on Solenoid valve Reply with quote

 Dear  All,
 
 Thanks  for  your  valuable  comments  and  suggestions.
 
 As  suggested,  I  will  place  non-return  valve  between  needle  valve  and  diffuser.  
 
 I'm  using  square  type  solenoid  valve.  
 
 Regards,
 Senthil
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