I have a problem with a valve (air to close).
When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%.
I tried to tune positioner then removed it, the problem still exist.
Any idea
- 3 Answers
- 2853 Views
- I also Faced
- E-Mail Answers
Answer Posted / jigaranadkat
There can be may issues :
1) Very first indication is that your plug and seat are having some foreign particles or uneven surface which is restricting the valve for initial opening.
2) Check the springs of the actuator for any crack as when pressure is increased it lifts the valve.
3) Check for positioner relay.
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
what does the ratio 800-400-300-200/1-1-1-1-1 in the specification of current transformer indicates?
Why thermo wells are used? What materials are used in thermo wells?
Which type of diaphragm use in costic line, dm water line, natural gas line, oil line?
what is interface level and how it is calibrate?
wich is coming the first HAZOP OR SIL
in natural gas indirect water bath heater,how to prevent the problem of backfire from firetube during ignition...becoz of this backfire performance of wbh is going low.
For what reason would you possibly be compelled to make use of a Smith Predictor. Explain the idea behind the operation of this device.
what is actual drum level and compensated drum level?
how can be calibrate flow indication transmitter (rosemount) it shows excess milli amps nearly about 24 ma on full scale, but its scale was set on 20ma on full scale..???how can be simiulate..???
my data card only does run in my mobile so how can change it that it run other mobile & computer and i can stor data in my data card
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.
how u calibrate pneumatic n motorized c/v?
dear sir we have insatlled positioner model no.sipart PS2 make Siemens at our control valves . now problem is if we want to increase the response of valve opening speedy /fast. what parameters do we change for positioner ? any idea. please guide us.
What is the difference between conductive lined pipe and conductive unlined pipe? Why do we see that?
What are different types of valves?
