Answer / aftab ahmed mazari

It is a very lengthy topic. I will try to explain some major point.
1. Mark the parts orientation before dismantling, such as mark at body, bonnet, yoke, pressure chambers casing.
2. Note down the threads upper side and lower side of coupling.
3. Suppose, valve is air to open, open it with direct feeding signal to diaphragm upto 5%.
4. remove the coupling.
5. release load pressure
6. Loose yoke nut and remove yoke from bonnet
7. Remove gland packing nuts,remove gland pusher
8. Dismantle bonnet nuts
9. Remove bonnet from body
10. Remove trim material

whatis range of marcury filled tempereture gague

0 Answers   Dr Reddys,

---

why we use 24 vdc in instruments mostly?

2 Answers  

---

What is rtd output signal

4 Answers   Nestle,

---

what do you know about Foundation Fieldbus?

1 Answers   CCIE,

---

hi vishok this is noor plz tell me what type problems will occured i use T/C in the place of RTD in (FEED WATER TANK),plz send ur e-mail address to my ID (mail2noor.hyd@gmail.com)

6 Answers  

---

hi all plz tell me difrence between analog or digital load cell.

2 Answers  

---

how to measured k type thermocouple temp.

3 Answers   NTPC,

---

What is difference between ESD and PLC please Explain me clearly.

0 Answers  

---

If i have 4 Allen Bradely make RS logix 5000 PLC and for viewing that we are using 4 RS view SCADA for 4 different packages. Now, I will want to view two packages on only one SCADA. Then how i will do it?

0 Answers   Essar, Reliance,

---

pls provide me syllabus and old question paper of instrumentation engineering for GET(JSPL)

0 Answers  

---

Where & Why we are using SURGE PROTECTION ?

4 Answers   IOCL,

---

what is The specifications for oriface instalation

0 Answers  

---