Answer / mohammad reyaz ansari

Globe valve, Butterfly valve, Gate valve, Diaphergm valve,
Ball valve, Knife Edge valve, Angle valve, Three way valve,
Twoway valve.

Answer / samir

There are two types to define the control valve types:

(1)As per action
(2)As per design

1. As per Action : (a)Air to open (b)Air to close
2. As per design : Globe valve,Gate valve,Ball
valve,Diaphragm valve,Butterfly valve,Knife edge valve ect.

Answer / ns

The question can be mean different way.
One answer is as follows. depend upon the valve actuator
can be consider two types. AIR FAIL TO CLOSE and AIR FAIL
TO OPEN.

Answer / sudheer

AFO is Air Fail Open,AFC is Air Fail Close,What is "AFS"?I
heard Air Fail Static.If the valve static position in air
fail condition how it is possible,Can you please explain.If
the valve not acting as AFS how to troubleshoot?

Answer / suhel

As per action 
As per design




1. As per Action : (a)Air to open (b)Air to close
2. As per design : Globe valve,Gate valve,Ball 
valve,Diaphragm valve,Butterfly valve,Knife edge valve ect. 

Answer / faheem haider

Two types
1. Linear
2. Rotary

Answer / dhirendra kumar singh

pneumatic control valve,motarise control valve,hydraulic
control valve,globe control valve,butterfly control
valve,flow control valve,automatic control valve,stainless
steel control valve

Answer / muhammad sanaullah

sanders patent valve , Butterfly valve , Three way valve , Two way valve , Angle body valve , Needle valve , V-port valve , Double seated valve .

Answer / s93381

flow control valve
Temp control valve
level control valve

Answer / anand.k

servomotor control valve,mass flow control valve,modulating
control valve,

I am a instrument technician. recently i attend interview and face one of question for DP transmitter ,the client asking about the calibration of DP transmitter ,am answer the calibration procedure, they will ask one more question. why open LP side in atmosphere? i did not answer that question. so please help me and explain the particular question. Dear firends waiting for your valuable replay

3 Answers   Qatar Petroleums, Samsung,

Please any one can explain how to calibrate transmitter (smart) online with out remove from the container suppose it is interface level or static pressure level measurement we dont want to remove transmitter from the container mean it is running plant please give me detail. thankx brothers

1 Answers   KNPC,

What is the use of temprature compensation?

0 Answers  

What is the diffrence between digital signal processing and discrete signal processing?

0 Answers  

Why we are using thrust bearing at turbine side?

3 Answers   Edac,

how to connect transmitter measuring sulfur process? 1-by using long impulse line or 2- by using coated short impulse line

0 Answers  

why is the sleeve of the cable used for?

2 Answers   Jindal,

How to calibrate a orifice differential pressure flow transmitter in process?

1 Answers  

two common seiling liquid used in seal pots are:

1 Answers   Thermax,

I am going to attend a recruitment drive by Schneider in 2 weeks. They have a technical test in the beginning. I would like to know what are the areas i should concentrate on while preparing for the test. My major is Electronics and Instrumentation.

1 Answers  

what is the input of conductivity sensor and meter during the calibration time and what is the output?

2 Answers  

what is three element in thermal boiler

9 Answers