Answer / aftab ahmed mazari

I agree with Yomama answer, but add one thing more, Cage also controls cavitation and flashing, it routes flow at different angles to avoid flashing and cavitation.

Answer / yomama

The walls of the cage contain openings that usually
determine the flow characteristic of the control valve.

Answer / yomama

The walls of the cage contain openings that usually
determine the flow characteristic of the control valve.

Answer / ayaz

control cage use for minimize the control valve noise and control  cavitation,flashing and plug support etc

Answer / faiyaz ahmad

cage is generally use for flow there are three types of cage linear equal percentage and quick opening which type we need flow according to the cage fluid will be flow that's it

Answer / mazari

Cage is used in control valve to control cavitation or to minimize it.
aftabmazari@yahoo.com

Answer / mohamed rafik

The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.

Answer / mohamed rafik

The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.

If you SOURCE your outputs from a PLC, would you have to make the output HIGH, or LOW, in order to switch an output ON?

1 Answers  

We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

in my company organisation in plan to take new PLC system for replacing old relay system , for that what I/P needsd to submit to the system house of PLC supplier?

1 Answers  

What is the purpose of bypass valve across AS valve.

0 Answers   ADMA OPCO,

Explain about the leakage class of the control valves

0 Answers   CCIE,

which are types of orifice tap ?

2 Answers  

Explain ratio control system.

1 Answers  

what is the difference between laminor flow and turbulant flow

2 Answers   Invensys,

how to relay switch sense the fault?

0 Answers   ME,

what diffrence b/w plc s7200,300,400

0 Answers   IFFCO, Reliance,

If an Instrument has 550 ohm internal resistance and the cable used for that instrument is 0.5 ohm per meter resistance. If the voltage is 12volt.How much length cable can be used? Please tell me its Calculation formula.

5 Answers   MOL,

Anybody know how to create a ladder programme for power switch in TV remote without using counter... ie TV can be turn on and turn off using single push button switch... on pressing the switch first time TV turn on and hold the on state till i press the switch again, and after TV turn off.

2 Answers