7 replies to this topic

[trungphu]

Dear all,

 

I have a couple of queries about a liquid ammonia pump that is operating at -33 Celsius degrees.  What are the main purposes of the equalizing pipe to suction vessel and the line for pump quenching?  The suction and discharge pressures of the pump are, respectively, 0.6 barg and 11 barg.

 

I hope to get valuable answers from professional engineers in the forum.

Edited by trungphu, 10 September 2015 - 04:21 AM.
spelling, grammar

[breizh]

Hi ,

Consider these resource to support your work .

 

Hope this helps

 

Good luck!

 

Breizh

[trungphu]

Thank Mr. Breizh for your help

[Satyajit]

Hi,

      Appreciate your questions. These are good points .  I think the lines you  mentioned are  meant for pump cooling and to remove any vapors formed in pump CAN.  Please submit your pump P&ID so that so  I can give you  exact reasons  for the lines provided.

Kind regards,

Satyajit

[trungphu]

Thank you so much , Mr Satyajit. I  dont know how to upload a photo on this website.

[fallah]

trungphu,

 

By clicking on "more reply options" at the bottom of the window in which you write the reply, you can attach and upload any file relevant to that reply...

[trungphu]

Thank you, Mr. Fallah.

 

Mr. Satjaity : Please refer to the PI&D I attached  to this reply.

Attached Files

•  WP_20151003_004.jpg   68.66KB   7 downloads

[manojkaila]

Dear,

 

As per my understanding this line is a casing vent.  This is required for introducing cold NH₃ liquid into the pump, cooling it down by vaporization of the initial NH₃ and allowing the pump to pump the cold, saturated NH₃ liquid without vapor binding the pump casing.  The pump can only pump liquid and will vapor bind if filled with vapor.  Once the initial cool-down of the pump is done, the casing vent line should be blocked and closed to allow the pump to operate normally with liquid.