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
5797 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

Anybody know how to create a ladder programme for power switch in TV remote without using counter... ie TV can be turn on and turn off using single push button switch... on pressing the switch first time TV turn on and hold the on state till i press the switch again, and after TV turn off.

2 Answers

WHY WE NOT USE 2-20mA,1-20mA,3-20mA or 10-50mA SIGNAL? INSTEAD OF 4-20mA.

6 Answers Hindustan Unilever Limited, Yashmun Engineers,

Calibration of flow transmitter.

1 Answers CCIE, Power Plant,

If range of 3-15 psi, a multiplying relay with a 1:2 ratio would give what output pressure for 6 psi input?

1 Answers

can u plz send me technical questions asked in SCHNEIDER ELECTRICAL technical paper?

0 Answers TCS,

what is the best method to measuring level in high pressure and temperture thank?

4 Answers

Where we cant instal mass flow meter.