Single acting ON-OFF valve. it is air to open. when sov energized , valve will b

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

Question Posted / neel

4 Answers
6143 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during th..

Answer / ahmed

the valve will close because air is fail then only one force is available the spring force the valve will follow spring power even if sov still energized

Is This Answer Correct ?

13 Yes

0 No

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during th..

Answer / prem

Since SOV is energized theoretically valve will not close. To depressurize the actuator/valve SOV must de energize to open the vent port.
In Other whand,if pneumatic source become empty and no back up supply, Valve will close gradually due to loss of instrument air supply even though SOV is energized.

Is This Answer Correct ?

5 Yes

1 No

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during th..

Answer / kausar

If it has airlock then it will be remain same because at the time of pneumatic failure it locks the air automatically.generally now with control valve airlock,booster ,sov and air filter regulator are arranged in order to make the line safe

Is This Answer Correct ?

1 Yes

1 No

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during th..

Answer / bibhutibhusan0

It will be remain in same condition if there is no air leakage and the valve is not spring loaded.

Is This Answer Correct ?

1 Yes

1 No

Post New Answer

More Instrumentation Interview Questions

how many types of sensor in instrumentation

3 Answers SRACO,

Please send the all question with answer related for interview.

1 Answers

What are securities of turbine?

1 Answers

WHAT IS SMART SENSOR AND DIFFERENT B/W SMART SENSOR AND SENSOR??? PLS GIVE ME ANSWER AS SOON AS POSSIBLE.....

1 Answers

what is ment by PID controllers? explain with example?

2 Answers

How to derive IO Count (AI, AO, DI and DO ) from a Field instrument (FI) Bill of Quantities (BOQ) given by client.

1 Answers

how the transmitter send MA?

1 Answers

What is mean by Ethernet, Device net and Control net? For what application we are using these?

4 Answers

what is the difference between sinking and sourcing inputs and also what are there applications?

2 Answers

how do calibrate the valves.. with clear manual

0 Answers Essar,

diff bw range and span?

3 Answers

How to calculate the flow rate in Vortex flow meter?What is K factor?Can you give me an example calculation to understand the same as better?

1 Answers npcc, Zadco,

For more Instrumentation Interview Questions Click Here