Interested to Buy Any Domain ? << Click Here >> for more details...
HI FRIENDS IHAVE QUESTION 1.WHAT IS PARTIALSTROKE TEST?WHY
IT IS USED ON ESD ON OFF VALVES?
- 3 Answers
- 8625 Views
- KNPC, Rotork, I also Faced
- E-Mail Answers
Answer Posted / sebastian
ESD valve or EIV(Emergency Isolation valves) are only used
(operates)for Emergency conditions only, usually theses
valves are reamins open till incase any Emergency occures
that is fire .some times it remains open till plant next
turnaround@3-4 years).so valve trim or actuator may stuck
due to some reason and valve never clos when real
Emergency, to avoid this situation , goverment athority or
insurance company guidlines are given to plant operation
section to check availablity and functionality of ESD
valves periodically, may be each 3 month, 6 month etc.
Partial stroke: Valve start to move from its open position
to close postion only @20-25% of its total traval(to avoid
process upest)and return back.there is a Function logic
built in the ESD logic with Protection timer(incase valve
limit switch not moved from open postion at set time the
logic will re set for valve its open condition and
indicate failed.(partial stroke test failed) .
if valve moved from open position (by means of limt switch
leves its contact)logic will re set and remais for open
position and indicate succes test.
if any details requred with logic contact me
sebalukose@gmail.com
| Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
How to Calibrate Level Troll in field
what is actual drum level and compensated drum level?
Draw symbols of the following :
what are the values of fuel flow rate in various places in boiler.
how will you segregate the alarm levels in alarm management system during factory Acceptance Test
What is sensitivity in vibration probes..?
How do bending tubing provide better measurement than using tubing fittings such as elbows?
how does we calibrate a square root flow transmitter ,give an example and explain it step by step like range calculation , calibration hook up series connection , zero check , and how to apply pressure , and if not geting proportional output then what should we do ?
while am calibrating Drager polytron 2IR flame gas detector occured non zero status.how can i get zero status?
key phaser where is use and work
What is the principle of capacitance type level transmitter?
hello sir/madam, I,Subramanian need 5yrs placement papers of officer trainee of Instrumentation technology.pls send to this mail id mani_nxtgen@yahoo.co.in please do the needful. with regards, subramanian.v
What is the exact differences between HART,FOUNDATION FIELDBUS,PROFIBUS?
why micro controller 8051/52's clock frequency is internally divide by 12 ?? and why it is further divide by 32 in UART serial communication ??
Can I route 110 VDC and 24 VDC in a same Duct for our Interposing relay cabinet? IF yes or NO Please provide me IEEE Std. for the same. Please i required it on Urgent basis, i need to design IRP Cabinets and we have MCC 110VDC and Our Coil side is 24VDC, Please help as soon as possible.
