API Plans 02 & 11

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API Plan02

Product recirculation from pump discharge to seal through a flow control orifice.

Required Media Characteristic-

  • Clean fluids with low temperatures and higher specific heat such as water

  • Can be used in some suspensions and solidifying fluids

Feature -

  • Does not need any external piping.

  • Used in relatively low speed pumps is used.

  • Cooling water or low temperature steam can be used in the seal chamber cooling jacket to decrease seal chamber temperature.

  • Normally is used along with a jacketed seal chamber. It can also be used for tapered seal chambers, especially for slurries.



API plan 11
    
Product recirculation from pump discharge to seal through a flow control orifice

Required Media Characteristic-

  • Clean and Non Polymerizing fluid

  • Moderate temperature

  • Media should not contain abrasive 

Feature –

  • It is default plan in all seals

  • Prevents product from vaporizing by maintaining positive pressure above vapour pressure.

  • It is self venting plan

  • If  pressure  difference  between  discharge and stuffing box is less then we prefer plan 13

       

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