Interested to Buy Any Domain ? << Click Here >> for more details...
Control valve Flow characteristic. How the equal percentege
curve form?
- 5 Answers
- 11029 Views
- I also Faced
- E-Mail Answers
Answer Posted / k.surya mutyalaro
each increment in valve lift increases the flowrate by a
certain percentage of the previous flow. The relationship
between valve lift and orifice size (and therefore flowrate)
is not linear
but it is depends on Valve rangeability (ratio of the
maximum to minimum controllable flowrate)
v(h)=((e power x)/t) * Vmax
V(h)=
Volumetric flow through the valve at lift H.
x
=
(ln t) H Note: 'In' is a mathematical function known as
'natural logarithm'.
t
=
Valve rangeability
H
=
Valve lift (0 = closed, 1 = fully open)
max
=
Maximum volumetric flow through the valve
it is very important that the Valve rangeability defers
from the valve to valve.
| 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 does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?
how to calibrate electro pneumatic positioner 8013 mil controls ltd ?gsr
How do you identify between actual alarm and false alarm in a Temperature Transmitter in SCADA based Control System
How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?
How digital input and digital output 's are working in dcs
What are the key features of a Distributed Control System? describing the various layers (sensor through to business system interfaces) as well as the hardware, software and security aspects of the DCS.
what happen if i increase height of displacer type LT.accuracy or sensitivity are affected.why?
In Safe Guarding test what means by "Failed to Danger" ?
hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....
what is thermo coupler and how it works
Which type of diaphragm use in costic line, dm water line, natural gas line, oil line?
can any one tell me when ongc placement test and its forms is available????/ pls tell me if u know
What is the use of each wire in three wire RTD
what is a half wave, full wave, and bridge rectifer.
