Interested to Buy Any Domain ? << Click Here >> for more details...
when the operation engineer told you that he gives the
control valve order to open but there is no response !
what will you do ?
and if you found that there is astuck , what will you do ?
(note : it is apanumatic valve )
- 5 Answers
- 7826 Views
- I also Faced
- E-Mail Answers
Answer Posted / b.kumaran
after doing all the priliminary inspection if u found the
valve is struck, u can directly give the air supply to the
actuator in a repeated manner.if the struck
is minor by repeaded giving of supply air will slowly
remove the struck.still its struck then loosen the body
bolts and try to open by the above method. If still there is
a struck up then u can remove the valve from the process
line, dismantle and clean the valve body whether any solid
material bloks the way.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Specific gravity.
give me the formula for analog to digital converter and also d to a converter
Exothermic reaction./ endothermic reaction
if my flow is 20000 m3/h than which range of DPT i have to use????
can anyone tell me about the basic concepts to consider before to start a PLC panel wiring
what can of fault ofently come in vibration mesurement?
which type of zones used for boiler? & why ?
Q1]IF THE RANGE FOR FLOW IS -35 TO 125 WHAT WILL BE THE SPAN FOR ABSOLUTE AND FOR NORMAL? Q2]HOW TO CALIBRATE CAPILLARY TYPE LT? Q3]HOW MANY ERROR CALCULATIONS ARE THERE USED IN PROCESS INDUSTRIES? Q4]HOW TO CALIBRATE TEMPERATURE TRANSMITTER? Q5] HOW TO CALIBRATE LEVEL TROLL AND HOW TO CONNECT? Q6]PLEASE TELL ME THE BASIC FOR INSTRUMENTATION WHICH IS APPLIED FOR CALIBRATION AND FOR ALL? PLEASE MAIL THE ANSWER TO honest_yes@yahoo.in
How can measure flow in oil line?which type of transmitter is generally used?
what does it mean an active front end in vfd plz explain it briefly
we have a s-5 simense plc having op7 .recently on op7 showing error 1.plc not present 2. DB error frequently. can u have any solution . please send me.
typical loop drawing of a simple feedback control comprising of one transmitter and one control
How to measure the dust in chimney(spm)?
Operational amplifiers
Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =
