what is cavitation in control valve?
& how we can avoid it?
Answer / rajesh.
When a fluid passes a valve the fluid velocity increases. If the speed through the valve is high enough, the pressure in the liquid may drop to a level where the fluid may start bubble or flash. The pressure recovers sufficiently and the bubbles collapse upon themselves.
This situation is extremely destructive and may wear out the trim and body parts of the valve in short time which called Cavitation.
With an increasing fluid temperature the possibility for cavitation increases.
Cavitation can be avoided by using more than one control valve or more convenient - a multistage control valve.
Is This Answer Correct ? | 18 Yes | 1 No |
Explain the mechanism behind the turbine meter.
What are the questions asked in fresher instrumentation candidates
What are the disadvantages of Human-Machine Interface (HMI)? atleast 3.
If a transmitter is installed 10 m below its tapping point how much pressure exerted if fluid is water?
how pressure reduce through pressure control valve? suppose we have to reduce 20 kg pressure to 10 kg pressure , then what we do ? open the valve or close the valve , initially it is 20 % is upon ( for ur knowledge ).
Pls.could any one Clarify the following with an example. 1.At What condition Close on Rise and Close on Fall Pressure Switch contacts are used. 2.If Pressure is abnormal as per set pressure,if connecting Terminal of pressure switch breaks,how the voltage extends to Relay base. 3.Are these contacts come under fail safe philasaphy.
what is function of DCS , and how is it work , explain with difination
1 Answers Bapco Bahrain Petroleum Company,
What are the logic behind 2x2 and 2x3 logic and more when ask in interviews
How do you calibration D.P transmitter? ?
WHY THE DEGREE OF VALVE PLUG AND VALVE SEAT IS SLIGTLY DIFFERENT I CONTROL VALVE TRIM DESIGN
what is the difference between servo valve & proportional valve
What are different types of valves?