CR4® - The Engineer's Place for News and Discussion®


Previous in Forum: Trash Rake Design   Next in Forum: Decompression Valve for an Emergency Diesel Generator
Close
Close
Close
7 comments
Participant

Join Date: Jul 2017
Posts: 1

Ebara HP Ammonia Pump Seal Water Leak Off

07/16/2017 8:00 AM

Hi All,

I need to know what is the use of the leak off line on the Ebara hp ammonia pump and how to use or when it has to be opened and when i can close back.

Thank you in advance.

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Guru

Join Date: Mar 2007
Location: at the beach in Florida
Posts: 19263
Good Answers: 1129
#1

Re: Ebara HP Ammonia pump Seal water Leak Off

07/16/2017 12:19 PM
__________________
Life is like riding a bicycle. To keep your balance you must keep moving. A.E.
Register to Reply
Guru

Join Date: Apr 2011
Posts: 6557
Good Answers: 241
#3
In reply to #1

Re: Ebara HP Ammonia pump Seal water Leak Off

07/16/2017 4:22 PM

The diagram does not appear to represent a pump that uses seal water. The magnetic coupling črosses a welded barrier separating the motor fron the pump. There might be fluid usec for cooling, but there isn't any needed to seal a shaft for what is represented in the diagram.

__________________
Eternal vigilance is the price of knowledge. - George Santayana
Register to Reply Score 1 for Good Answer
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 19986
Good Answers: 750
#4
In reply to #3

Re: Ebara HP Ammonia pump Seal water Leak Off

07/17/2017 12:24 AM

I wonder about that too. I have often seen low-temperature oil used as a sealing fluid in ammonia pumps, but water seems odd. (Unless maybe used to pressurize the area above the cable seal gland [??]). Other items in the drawing also remain unexplained.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Anonymous Poster #1
#7
In reply to #1

Re: Ebara HP Ammonia pump Seal water Leak Off

07/28/2017 4:39 AM

This is an in column (in tank) magnetically coupled submerged pump and will have no seal or "seal water leak off".

Ebara makes a multistage API 610 pump suitable as an ammonia feed pump, but these are usually fitted with API Plan 53 seal systems, so again no seal water.

Only other possibility I see is that this is an old installation with a single seal with a water quench - if so, not a great place to work.

Register to Reply
2
Guru
United States - Member - Hobbies - Fishing - New Member Hobbies - Target Shooting - New Member Hobbies - RC Aircraft - New Member Engineering Fields - Aerospace Engineering - New Member

Join Date: May 2009
Location: On the road, USA
Posts: 2164
Good Answers: 68
#2

Re: Ebara HP Ammonia pump Seal water Leak Off

07/16/2017 1:10 PM

What do the operator/ maintenance manuals have to say about it?

We need more information like, what is the model number of this pump? Ebara makes several different types of pumps.

I, myself would not play with anything until I know.

If and when in doubt, call Ebara,

US office 1-775-356-2796

Middle East & Africa office 44-1372-739-666

Asian office 81 (3)6275-5732

__________________
Confucius once said, “ Ability will never catch up with the demand for it".
Register to Reply Good Answer (Score 2)
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain, and now disconnecting as Little England and Wales (not too sure about Wales bit, either). Kettle's on.
Posts: 26715
Good Answers: 701
#5

Re: Ebara HP Ammonia Pump Seal Water Leak Off

07/17/2017 11:28 AM

The original equipment manufacturer's Technical Helpline should always be the first source of information.

__________________
"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Guru
Safety - Hazmat - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Chemical Engineering - Old Hand

Join Date: Mar 2011
Location: Lubbock, Texas
Posts: 13540
Good Answers: 155
#6

Re: Ebara HP Ammonia Pump Seal Water Leak Off

07/17/2017 1:52 PM
  1. Obtain the model and serial number of the pump
  2. Call Ebara customer service and ask them several questions about this pump, including the one you posed to this forum.
  3. Standby for their answers in response to your questions.
  4. Be prepared to restore the pump to new conditions based on what you are telling us here.

That should just about sum up what Ebara folks will recommend.

__________________
If it ain't broke, don't fix it. Just build a better one.
Register to Reply
Register to Reply 7 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); dj95401 (1); James Stewart (1); PWSlack (1); SolarEagle (1); Tornado (1); truth is not a compromise (1)

Previous in Forum: Trash Rake Design   Next in Forum: Decompression Valve for an Emergency Diesel Generator

Advertisement