Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...


why full bore ball valve is not used in steam applications?



why full bore ball valve is not used in steam applications?..

Answer / 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

More Instrumentation Interview Questions

Flame scanner

1 Answers  


What is protocol ?

3 Answers  


our kks tagging is crossing more than 12 character please suggest how to take tags in the DCS

0 Answers  


why use on -off control valve in glove valve

1 Answers  


State 5 different method of level measurements.

3 Answers   SRACO,






which gas or which liquid is filled in capillary of dial type temperature indicators on power transformers

2 Answers  


how to calibrate the temprature transmitter MURCREYtype and thermocouple input type.

1 Answers   Shree Cement,


Why thermo wells are used?

1 Answers  


Why do we floating DC in DC system.

0 Answers  


what is PM/CM/RCM?

2 Answers   Emco,


What is the difference between DCS and SCADA?

1 Answers  


How to measure high frequency using thermistor

1 Answers   DRDO,






Categories
  • Civil Engineering Interview Questions Civil Engineering (5074)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4444)
  • Electrical Engineering Interview Questions Electrical Engineering (16594)
  • Electronics Communications Interview Questions Electronics Communications (3915)
  • Chemical Engineering Interview Questions Chemical Engineering (1092)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (214)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (258)
  • Instrumentation Interview Questions Instrumentation (2986)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (123)
  • Power Plant Engineering Interview Questions Power Plant Engineering (170)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (0)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1377)