Answer / raj anu raj

the valve will go to its fail safe position ie.. either
open or close

Answer / varathan

when communication failure occurs, Valve positioner have
three different action depend on application.
1. Fail to close
2. Fail to open
3. Fail to Standstill.(remain in the previous position)
Note: In automatic closed loop system, during failure
condition; controller must be forced back to manual mode
for safe operation

Answer / vijay singh

if profibus fails in operation.Valve positioner have
different action depend on application.
1.if valve is fail to open then valve will be in fully open
position
2.if valve is fail to close then valve will be in fully
close position.

Answer / ecxlsync

in an event of profibus failure or an absence of command signal, some valves will remain its current position, some will return to its safe position (fail safe).
There are valves designed to fully close (Fail to Close) or Fully Open (Fail to Open) in an event of failure.

Answer / jignesh parekh

during fail of profibus a valve be remain as it is. because
there is no command to travel a control valve move close or
open.

Difference between ultrasonic flow meter and radar type flow meter

2 Answers   Dodsal, Qatar Petroleums,

what is piezo electric transducer?its principle?

2 Answers  

what pressure transmitter?

8 Answers   Bhel,

micromotion flow meter used for

3 Answers   Reliance,

what is unit and element of viberation?

1 Answers   Kentz, KOC,

how to calibrate and troubleshooting of leveltroll?

0 Answers   Kharafi National,

Please explain the difference between instrument range and calibration range in terms of pressure transmitter? line design pressure: 93 bar operating pressure : 82 bar press Transmitter Range? calibration range ?

3 Answers   L&T,

NAME ANY TWO ELASTIC PRESURE SENSOR?

2 Answers   DVC,

we want to control pump in let pressure and tank (for exp) our inlet line if water cam and pump will on and when our tank will full pump will off also if our inlet pressure low pump will off even tank not full.this pump i want to uses on our water supply line.

0 Answers  

how to convert cubic metre per hour to newton cubic metre per hour

0 Answers  

how can calibrate transmitter online

2 Answers  

How to convert gpm into inches of eater.I nerd formula with example so pls help me.

1 Answers