Today we stroked a control valve and looked through the outlet port. The entire cage seemed to move up/down. Is our valve damaged? Until now, I thought that only the plug moves inside the cage. Movement of the cage means what? that the cage has been detached? In case such valve exists, what is...
Spare actuator-diaphragms for installed control valves
In our plant, some control valves are getting old and diaphragms are getting damaged. We wish to procure diaphragms only (not entire actuators. Which data (general specs) has to be included in indent for a procurement case. We opened one of...
The starting current for some of our 6.6 kV motors is more than 12 times of rated current. What could be the possible reasons for such a high starting current?
If the injector solenoid opens somehow while the engine is off, what will happen? Will the diesel fuel be admitted to the cylinder in the absence of required compression ratio or some protection will prevent this from happening? How can the fuel be removed from the cylinders if this happens in...
We have two power transformers of 132 kV/6.6 kV each. Both are of different make. One is 25 years old, the other is brand new. The only common points between the two are: same volt-amp ratings i.e 10/13 MVA, same turn ratio corresponding to 132 kV/ 6.6 kV, and they both have OLTC (of different...
On a newly installed power transformer, we are observing some arcing type noise coming from (most probably) the tap changer. The noise is noticed on a single tap only: when the transformer is at some other tap, the operation is noiseless.
Can anyone please point out the reason and remedy for...
