Interested to Buy Any Domain ? << Click Here >> for more details...
what is the meaning if the control valve CV is 27,in terms
of selecting procedure?
- 2 Answers
- 11224 Views
- I also Faced
- E-Mail Answers
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 ? | 6 Yes | 1 No |
Post New Answer View All Answers
I want measure the volumetric flow of gas in waste heat recovery Boiler?Tell me how and which type of instruments required. Plz mail me:naba02222@gmail.com Sam please post the answer .
How many types of sensor
I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.
what are the use of belew gear in general ??
Which type of diaphragm use in costic line, dm water line, natural gas line, oil line?
Capacitance, resistance ( colour coding ), parallel & series circuits.
what is interface level and how it is calibrate?
How can measure flow in oil line?which type of transmitter is generally used?
how can i check vortex shedder bar it is ok? if there is ohms condition are shown correct?
What are primary elements of measuring pressure?
where proximity sensor installed on tank in loading arm application
what is interlock system and why we use of this?
what is the procedure of O2 sensor(ABB) calibration?
What is offset in a control system.
how do i tune dearator pr control valve using PID. we set the set point is 0.6kg/cm2 now i want 0.5 to 0.7kg/cm2 limits so what should i give p,i,d values. then pls explain how do set pid values for control valve tuning?
