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Join Date: Aug 2008
Posts: 56

What Kind of Level Switch Is This?

02/23/2009 4:28 AM

Can anybody tell me what type of level switch is this. Base of the tank is liquid ammonia and the upper portion is gasous ammonia.The one end of the switch is connected to the inlet line which is liquid ammonia and the other one is connected to the outlet line which is gasous ammonia.

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Anonymous Poster
#1

Re: What Kind of Level Switch Is This?

02/23/2009 12:15 PM

Y dont u ask the licensor?

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Anonymous Poster
#2

Re: What Kind of Level Switch Is This?

02/23/2009 10:55 PM

Dp switch, calibrated to suit the conditions, also Ex rated

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Join Date: Oct 2007
Posts: 29
Good Answers: 1
#3

Re: What Kind of Level Switch Is This?

02/23/2009 11:01 PM

This is a Level Switch based on Differential Pressure.

Low side is connected to the TOP of the tank through which vapour pressure is compensated, which is acting on both sides. Finally you will detect actual LEVEL of Liquid.

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Commentator

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Posts: 56
#4
In reply to #3

Re: What Kind of Level Switch Is This?

02/24/2009 2:01 AM

I searched out for DP Type level switch but i could not found. Can you please suggest me any model for such switch.

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Associate

Join Date: Oct 2007
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#6
In reply to #4

Re: What Kind of Level Switch Is This?

02/24/2009 3:13 AM

Dear Rajkumar,

There is one more link you can try;

http://www.ashcroft.com/library/PS_gseries.pdf

Goodluck !!!

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Join Date: Apr 2008
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#5

Re: What Kind of Level Switch Is This?

02/24/2009 2:06 AM

LSHH stand for Level Switch High-High, This must be a diffrential pressure switch. It is not possible to use normal level switch like in oil or water when you have ammoniac.

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Participant

Join Date: Feb 2009
Location: Canada
Posts: 4
#7

Re: What Kind of Level Switch Is This?

02/24/2009 8:15 AM

Looks to me like a differential pressure switch. The top connection should be connected to the low side of your switch. This is what is refered to as your compensating leg which compensates for the pressure of the gas in a closed tank. You can confirm what you have by cross referencing the model number to the product sheet of the instrument. If you do not have the product sheet, check on the manufacturer's web site.

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

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Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#8

Re: What Kind of Level Switch Is This?

07/25/2024 7:31 AM

Yes. It will be found on the Instrument Schedule document applicable to the design. The names of the <...anybody...> will be found on that document.

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Anonymous Poster (2); Instrumenttech (1); jangkly (1); PWSlack (1); RAJ KUMAR (1); srzambre (2)

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