Answer / akhil pawar

in flashing, upstream pressure decreases to vana contracta
point.at this point,pressure is called as vena contracta
pressure.after this point , pressure recovery starts but its
not that enough to take down stream pressure above the
vapour pressure. means downstream press< vapour press.as a
result bubbles are formed and they remain there ,not
collapas.this is flashing,combination og liquid and vapour
flow at downstram.
in CAVITATION also, same situation arises.
only difference is downstream pressure is > vapour pressure,
therefore bubbles formed are burst.

In control valve , Failure position : Close If it is Fail close(FC) during failure of AIR.. what will be the initial/ normal position of control valve is it normally open or close? please some one explain soon..

2 Answers  

---

how to rectify the problem ,if we erected the DPT instrument wrongly of hp on lp side and lp on hp side?

5 Answers  

---

How does pyrometer works?

1 Answers  

---

Dear all... I have 1 0-400 duplex type RTD, I connected the A side to the temperature indicator and B side to the PLC panel, but when I have observed then found that The PLC side temp has the variation. and it was distub to other RTD temp also. so what can I do.pls help me

1 Answers   Worley Parsons,

---

Why rdt and thermocouple both give different output .and one things more, how to generate  ohm or mili volt  plz mail me merajalam143545@yahoo.com

0 Answers   Samsung,

---

tion 0,50,100% equql to voltage formula?

1 Answers  

---

What is controller? What is transmitter?

1 Answers  

---

what is interlock ckt? why it is necessary in industrial machines ?

2 Answers   IOCL,

---

Give 2 application of quartz crystal used for process parameter measurement.

1 Answers   ADMA OPCO,

---

what is LAS in foundation fieldbus protocol?

1 Answers  

---

Explain the burnout feature.

0 Answers  

---

I have a problem with a valve (air to close). When it is fully closed and try to open 1% it doesn't responce till 3% open suddenly more than 3% then back to 3%. I tried to tune positioner then removed it, the problem still exist. Any idea

3 Answers  

---