Why we use the double acting control valve in flow line?
Answer Posted / carl_ellis
Part of your problem is your terminology.
Valves are chunks of machined metal and elastomers, valves
are not single action or double action, the actuator that
moves the valve stem is.
So your Google search should be for double action actuator,
which will provide you an answer.
Carl Ellis
Measure First
| Is This Answer Correct ? | 8 Yes | 3 No |
Post New Answer View All Answers
POSSITIVE PULSE IS APPLIED TO AN INVERTER INPUT.THE TIME FROM THE LEADING EDGE OF THE INPUT TO THE LEADING EDGE OF THE OUTPUT IS 10 ns. THE TIME FROM THE TRAILING EDGE OF THE INPUT TO THE TRYLING EDGE OF THE OUTPUT IS 8 ns. WHAT ARE THE VALUES OF tPLH and tPHL?
how to commission furnace ( water heater)
the whole paper was based on Transducers..questions like define repeatability, error,accuracy,precision..den there were many q. on the conversion of Pa to mmHg and other units.. also..der wer few Q. on some level sensors(with diagram)
where uses EXe /EXd/Exo/Exn/Exp/Exq/EXia
how can i check vortex shedder bar it is ok? if there is ohms condition are shown correct?
selection criteria of control valve? and selection criteria of actuator explain in brief?
what is cold loop? difference between hot and cold loop?
Calibration procedure for electro magnetic flow meter
CONTROL VALVE OPERATING IN MANUAL BUT NOT IN MANUAL. WHAT SHOULD BE THE PROBLEM ?
what different types of problems do occur while doing instrumentation commisioning and how to solve them? please explain in detail
Which type of diaphragm use in costic line, dm water line, natural gas line, oil line?
what are the definitions of input, output, command & signal according to instruments controlled by PLC using DCS System?
why fuse block is not used for AI signal?
1)How many tpes of vibration probe and how many tpyes of vibration. 2)how we can calibrate a vibration probe with tk3 3)what is RMS value in vibration measuring application and how we calculate it.
need instrumentation job completed 1 year trainee ship in mnc pesticide company. now in search of job