how many type of control valve?

10 Answers  

---

What is full form of hart communicator?

2 Answers   KOC, UPL,

---

How to calculate flow of air bubbler type level transmiter  According hight and density 

2 Answers   Qatar Petroleums, RKS,

---

Explain about P&ID diagram?

3 Answers   Technip, Toyo Denki,

---

Instrumentation Safe Guarding test. How to determine the interval time of the test. eg:Halfyearly,Every year,Every three years etc.

0 Answers  

---

---

what is the difference betwwen the 2wire level transmitter and 4wire level transmitter??and their applications also??

2 Answers  

---

how to calibrate differential pressure switch

2 Answers  

---

how the actually positioner of control valve working? where we gave 3-15psi pressure to I/P converter where it is firstly applied ?- on I/P to positioner then what happen? is control valve operate on 3-15 psi or its bench pressure?

2 Answers  

---

difference b/w single acting and double acting actuator by using application only?

2 Answers   McDermott,

---

what is the thermocuple compensation circuit

3 Answers  

---

What for barriers are used in DCS & PLC systems?

2 Answers  

---

why use to 250 ohm for hart protocol and why hart communicator not communicate without 250 ohm 

4 Answers   OMV,

---