what is use single seated and double seated valve?

Question Posted / rijo

2 Answers
4552 Views
Doha Petroleum Construction DOPET, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

what is use single seated and double seated valve?..

Answer / prem

in any application single seated valve permit 2 to 3% leak in full closure position advice to use double seated valve to ensure tight shut off.

Is This Answer Correct ?

4 Yes

4 No

what is use single seated and double seated valve?..

Answer / praveen kumar

double seated valve-this type of valve used in high pressure line to minimze the force applied to the stem by process fluid pressure across the fluid.
Explanatioin:-there will be two opposed force vector, one generated at upper plug and another generated at lower plug. the plug areas are approximately equal, then the force will likewise be approximately equal and therefore nearly cancel. this make for a control valve that is easiler to actuate.

singlw seated valve used to low pre applications to control accurately

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Instrumentation Interview Questions

what are the programming languages used in dcs

7 Answers

what is the differnce between PLC & DCS

7 Answers TVS,

what is meant by Hydroelectric powerplant?

0 Answers

can we use a control valve without positioner

19 Answers

what is fire and gas system?

2 Answers Andhra Petrochemicals Limited,

A length of steel pipe is used to carry sea water to a desalination plant. An adequate corrosion allowance must be specified and indicated in the piping specification, which affects the _________________________ of the pipe

0 Answers

draw the block diagram of a level transmitter ?

0 Answers Hira Group, Samsung,

how we can measure the interface level?is it possible to measure interface level with dp or pressure transmitter?

2 Answers

I have observed in field instrumentation work... I remove the fuse of an analog transmitter then it shows 7.75 kg/sq cm (which is practically wrong value)in DCS and when put the fuse it shows 0 in dcs. Then cheach the field transmitter termination and found moister. clean that and then it shows 1.1 kg/ sq cm which is right value. Please describe the above phenomenon.

1 Answers

what is the diffrence between plc&dcs

4 Answers HCL, Hindustan Zinc,

What is the working principle of oxygen analyzers(zirconium oxide type) used in CFBC boilers?

3 Answers Bajaj, Kohinoor, Wartsila,

WHAT IS THE Differance b/w on/off & pid control valve?

10 Answers

For more Instrumentation Interview Questions Click Here