Answer Posted / www.islamqa.com
#"Cv" for valve is known as: valve sizing coefficient or
valve flow coefficient
#It refers to " how many gallons per minute can pass
through a fully open valve under diffrential pressure of 1
PSI "
#Cv is a unitless value and by getting it's value we can
get the valve size in inch from tables.
#Cv is got from calculations using s/w provided by
manufacturer as we have many parameters affect its value,
and Cv value is critical as it affects valve size which
leads us - if wrong - to oversized valve or undersized
valve, which harm the process.
#Cv - as mentioned - is got from calculations using s/w,
but it has a basic formula for gas service and liquid
service.
#For liquid service:
Q = Cv (DP/ROH)^.5, ROH IS SPECIFIC GRAVITY
#For gas service:
Q = 963 Cv (DP(P1+P2)/ROH*T)^.5, T is gas temperature in
Rankin
Regards,
Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
ahmedsabry.online@gmail.com
CELL.: 00 2 0121367310
Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
How INtools is useful for routine Instrument maintenance?
Please any one can provide latest aptitude test,technical test and interview questions for tata consulting engineering (TCE) i need it asap thanks in advance
Tell me the field calibration procedure step by step with diagram of pressure gauge, pressure switch, pressure transmitter, temperature switch, level switch, flow switch, flow transmitter.
How hart protocol can be connected with control valves?
How the sizing of the analog signal cable is calculate?
How to calibrate the flow transmitter
Full form of KKS when use DCS.
Describe how to use megger to measure the earth resistance and insulation resistance
how to calibrate steam control valve in steam turbine
can any send me a forbes marshall dtron 316 manual
how to connect transmitter measuring sulfur process? 1-by using long impulse line or 2- by using coated short impulse line
What is solenoid valve? Where it is used?
what is the field bus calble ? what are diffrences in orang colur cable and black coular calble ?
Can anybody please let me know Orifice plate sizing calculation formula and step by step procedure
Dear Friends, we are planning to design Power distribution and Fiber optic in the same cabinet.Like Front side Fiber optic and Rear side Power distribution.Is it any possibility of problem occurs like interference etc? Your answer is highly appreciate.