Property and usage:
It  is  level  a  control  valve  developed  from  advanced  energy-saving  technology  introduced  from  abroad.  It  is  very  reliable  and  energy-saving.
Its  upper  and  down  parts  are  tightly  sealed  to  ensure  reliable  close.  It  is  mainly  used  in  various  automatic  water  supply  system  of  pools,  water  tower  and  so  on.


Structure and working principle:
It  is  roughly  composed  of  valve  body,  valve  clack,  piston  rod,  bonnet  spring  and  other  components.  When  the  water  level  of  a  water  tower  drops,  float  valve  is  open,  and  the  pressure  reduces  forming  pressure  difference  between  the  above  and  below  piston.  Driven  by  this  difference,  valve  clack  is  opened  and  water  begins  to  flow  in.  When  water  level  rise  to  the  control  level,  the  float  valve  closes,  and  the  pressure  increases.  At  that  time  the  valve  clack  is  closed  and  due  to  that  the  pressure  above  the  piston  is  greater  than  the  pressure  below.  With  such  a  repeating  circulation,  it  is  able  to  supply  water  automatically.