Interested to Buy Any Domain ? << Click Here >> for more details...
why full bore ball valve is not used in steam applications?
- 1 Answers
- 6316 Views
- I also Faced
- E-Mail Answers
Answer Posted / instru
Rotary valves like Ball, butterfly valves are called as
high recovery valves. High recovery means less pressure drop
ofcourse compare to Globe valves. The biggest problem with
high recovery valves is that they are prone to Cavitation.
In case of Globe valves the path is quite torturous and
hence less prone to cavitation. In case of ball valves flow
is starigh through the ball. Cavitation occurs when pressure
at the vena contract drops below the liquid vapour presure.
In case of ball valves the vena contracta pressure and inlet
pressure have marginal difference ( thats why high
recovery). When inlet pressure and vena contract pressure
are clsoe to each other valve is definetely to cavitate .
Hence Ball valves are not used in applications where
cavitation is likely to occur.
| Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
What is Droop? What is Step/Gradient Limiter in Turbine Governor control?
1.can you use SCADA instead of DCS,DCS instead SCADA 2.Difference between DCS and PLC,can their role be reversed i.e. role interchange 3.Difference between RTU and PLC
If a warning lamp will operate with the ground circuit is bypassed with a jumper wire to ground, what should you check?
can we replace a slot sensor (inductive type) with limit switch (potenial free contact / no-nc type).
What is instrumentation instrumentation engineering?
can anyone can let me know in Eurotron Micro cal 2+ calibrator in milli amps source mode we are not able to get 20 milli amps output it only produces 1.52 milli amps out, but display shows increase in milli amps , and err6 displays, let me know how to remove the err 6.
If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?
where i can get training in INTOOLS and PDMS in Delhi-NCR OR north part of India. please reply with ur ans. at arunsamkaria@ymail.com
describe flow nozzel principle?
defination of radial vibration?
Tell about your IFFCO plant visit.
any questions on motor and energy conversions machines?
I WANT SECURITY PAPER MILL, HOSHANGABAD TEST PAPER.KINDLY SEND TO MY MAIL ID
how will you check torque value during Factory acceptance Test for control valve/ESD ON/OFF VALE how will you confirm this torque value is being correct, Which document will you be refer.
How many interlocks at turbine? Plz explain briefly
