Answer / haridass

In normal running plant the ESDVs will not be operated
unless there is an emergency situation, it happens rarely.
Sometime those valves will get struck in open position and
it will not help the situation to protect the plant.

So to avoid this kind of problem, the PARTIAL STROKE
TESTING (PST) system is applied. Periodically, the ESDV
will be closed 20% from full open to close and immediately
open fully, which will not affect the process flow. This
movement makes the valve free from struck-up.

This PST function takes place only when the valve is full
open. During the valve close PST FAIL alarm will be
occured. and recorded in the event summary.

Answer / yasir & farhan

we give nearst 70 psi so just we that esdis fully open or
close

Answer / kyle condran

So you know your actuator works without fully closing you esd valve, as this is not a good idea unless you want to upset your process.

How can you add value to this Industry if offered the job?

0 Answers   SNS,

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how we can calibrate level transmiiter in field?

6 Answers  

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how magentic flow tx. vortex flow tx & ultrasonic flow tx works and its prinicle?its callibtration prosedure?

1 Answers  

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Why trim span ? How?

0 Answers  

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what is Automation?

3 Answers  

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what is span value and zero ? and how set ?

0 Answers  

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In RTU Panel we are having several Analogue & Digital Inputs /Outputs. We are recently facing some problems over Analog inputs , which are not updating properly (But Digital Input are updating normally) Can any one tell me from where the problem is creating , we have checked PLC CPU card, Analog Input card & we reconfigured ,But still the issue is there. Issue : 1. Sometimes Analog values are updating & sometimes not. 2. Analog values are not updating normally , showing some wrong Values 3. Total dead (0 value) Analog values are Level & flow measurement from the field instruments. (But in field the instruments are working normally & Displaying the values normally in local display unit) This problem we are facing in our Water Plant. If any one experienced this same problem or having any ideas related to our issue PLS send your valuable Answers/Replies...

6 Answers   L&T,

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yokogawa Temperature transmitter showing Error 15 which is Reverse Cal Fail (confirmation calculation result is bad) in manual they mentioned reasion That the output goes to the value set by hardware failure mode jumper. How can solve this problem ? anybody can say solution

1 Answers   GTL,

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Dear sir i m presently working in power plant nd my question is if any pump give flow 18tph then how would i know that how much range flow tx installed their flow line for flow measurement plz give me ans

1 Answers   HPSL, Infotech,

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what is diff b/w neutron and ground?

3 Answers  

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i have one absolute pressure transmitter for the range is -400mmhg to 400mmhg. If i do the zero trim at atmosphere the transmitter should be give 4ma or 12ma? which one is correct?

2 Answers  

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WE ARE HAVING YOKOGAWA CENTUM CS 3000 DCS, 2 FCS AND 4 HIS " When the operation Download to HIS message appears: Equalize start. HIS0163 WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. HIS0163 ---- ERROR = 3 WARNING = 1 ---- Tell me, please, why and how to solve the problem."

6 Answers   Khas Pvt Ltd, Yokogawa,

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