why use on -off control valve in glove valve

1 Answers  

---

How comparison of objects is done in PHP5?

1 Answers   TIS,

---

What s PDS & PDMS tools ?its role in instrumentation?

1 Answers  

---

why using 4-20ma not using 0-20or why not using 1- 20ma???????

7 Answers  

---

What is the Main principle and formula for the steam flow compensation?

2 Answers  

---

---

Can we calibrate an actuator?

5 Answers   Siemens,

---

How can we test a bently nevda 3500/42M accelerometer monitor card by simulating it with test equipment?. what king od of signal (milli volts or volts or or resistance ) we should feed in the terminals of the card?

0 Answers  

---

What is three element in drum level?

0 Answers  

---

what is air to open and air to close control valve and difference btwn this...and how to measure milli amp by this...and what is the role of positioner and i/p converter in this..plz help me

2 Answers   HCL, SOC,

---

In control engg. : Differences b/w 1st order & 2nd order system, graphically & theoretically ?

0 Answers  

---

can you send remote seal interface level transmitter calculation steps for oil water saperator.

0 Answers   Sasol Firm, Thermax,

---

Why we use 4 - 20 ma?

6 Answers   IJT, ONGC,

---