Control valve Flow characteristic. How the equal percentege
curve form?
- 5 Answers
- 9009 Views
- I also Faced
- E-Mail Answers
Answer Posted / www.islamqa.com
x-axis is %valve stroke
y-axis is %flow rate
we have 3 versatile characteristics:
====================================
linear: flow rate is linearly proportional with valve stroke
equal percentage: flow rate increases slowly with valve
stroke
quick opening: flow rate is increasing dramatically with
small valve stroke
Regards,
Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
CELL.: 00 2 0121367310
| Is This Answer Correct ? | 2 Yes | 2 No |
Post New Answer View All Answers
In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.
What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?
which type inter lock use in petrochemical refinery,and oil & gas?
how can i calibrate the temperatuture gauge used by temperature bath(dry block) i mean step by step procedure?
in sulfur process what is material of impulse line we use to connect with transmitter ? and does teflon affected by sulfur?
Give an example where you had aproblem on the job, and tell me how you solved the problem. and the finalvoutcome.
I am manjunath having exp in maintenance of chemical plants,know i want to do a design course INTOOLS,after doing design course can we get jobs in design field.sinve i dont have design exp..
how many types of spped sensors n vibration sensors?their basic principle n connection?
What should be the main consideration while starting the Rotating compressor when we dont know the cut in and the cut off pressure setting of the pressure switch
What care will you take in the installation of control valves,SCADA,DCS and FOC in Oil and Gas Project?
how to calibrate electro pneumatic positioner 8013 mil controls ltd ?gsr
Pressure tx shows 1 mbar but we need 1000 mbar at this process condition .. how can we sort it out .
how to tune siemens sipart electro pneumatic positioner..plz tel me..
line up procedure for dp type flow transmitter?
What types of Instrumentation Related Questions can an Interviewer ask in a Telephonic Interview ?
