Answer / jazz

the glycol serves as a calibrating fluid for your high and
low pressure impulse tubing of the dp transmitter. In this
way since glycol has a high boiling point and does not
evaporate easily, the calibration of your dp transmitter
remains the same as long as the level of glycol (the wet leg
compensating fluid)does not change. this serves also to
protect your transmitter's electronics from high temperature
since heat will be dissipated along the way on the impulse
tubing before reaching your transmitter..

Answer / mohammad iftikhar

Seal pots (sometime called condensate pots) are used
to allow a liquid seal between the instrument and flowing
gases such as steam. Their function is to keep the
liquid level constant in the impulse tubes. For example,
in boiler liquid level applications the high pressure (HP)
side of a differential pressure transmitter is connected
to the vapor space on top of the steam drum. Steam
condenses in the chamber or seal pot and fills the impuls
eline with condensate. The seal pot is located to
allow the condensate to drain back to the source thus
keeping the liquid level constant.

Answer / christian

it serve as protection to the instrument.it contain glycerin
or water vapor.with the principles of pascals law.external
pressure will be undiminished.

Answer / qamar abbas

if some meteriel come in impulse line he will block the
impulse line same like caustic sulphar thats why we fill
the glycol and also trasmiter superation and wet leg

Answer / suresh

The main purpose of filling Glycol is
(1) to avoid depositing of liquid with high density from the process which causes erratic reading. Glycol is having a density of more than 1.1 and normally liquids with less than this value will never settle down in the impulse line, giving a constant head which is suppressed or elevated to zero during the calibration.
(2)To transmit signals from process to transmitter where high viscous or solidifying products at ambient temperature is to be measured.Steam tracing can be avoided.

Answer / dsyedjaffer

Glycol used to portect electrions compounts ofthe transimeter.incase process variable is low density &pressure ie:white petrol
is easily evapourte inthe impulse line so we are used it.it is withstand high tem(1000 degree) so it used steam line

Answer / murali

it isolated the mix up of high pressure tapping & process
line fluid.and if any vapour presented in HP tapping fluid
it will remove it

How many types of Control Modes in process control, plz tell me all.....?

2 Answers  

what is the electrical operation procedure for switching on 27.6MVA electric furnace.

0 Answers   Jindal,

Why Pressure Transmitter is NOT installed before up-stream of an ORIFICE PLATE? in a flow measurement.

4 Answers   Mecon,

hii my name is sujith...i am preparing for HPVL GET 2010... so ,,,pls help me by send any previous questions or material to my site.....(Msujith_12@in.com) thank q

0 Answers  

what is the difference between cold loop and hot loop

2 Answers  

How can we check Zero of DP type Level Transmitter onside?

7 Answers   Birla,

why we are using perforted cable tray for control cable and ladder tray for power cable

1 Answers  

What is close loop ?

1 Answers   College School Exams Tests, GMR,

what are the difference between conventional and smart transmitter.

1 Answers  

can anyone guide me how to get any of the previous year GAIL question papers? are they available? 0n 2nd august i have to take the written test.

0 Answers  

what is preventive maintenance , explain with difination

1 Answers   Bapco Bahrain Petroleum Company,

What is the use of keyphasor in turbine.

7 Answers   Hindustan Zinc, R&D,