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  1. A

    3-Way Purge Valve Passing Liquid to Liquid Fuel Nozzle

    Waiting for any helpful idea. Thank you.
  2. A

    Questions on Lift Oil and Effect of Orifice Pressure

    First, I am the happy one here since I have have someone (like you) answering my questions and others' question. Second, I apologize if this was inappropriate. All I wanted is increasing my troubleshooting ability. I wanted to know how a change affects the system. Hopefully I will gain this...
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    3-Way Purge Valve Passing Liquid to Liquid Fuel Nozzle

    P&ID showing the re-circulation line and the line to the cans http://s000.tinyupload.com/index.php?file_id=42448606239873481490
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    False Start Drain

    Greetings We have 7FA Turbine, 14 cans and the false start drain is in the lower 7 cans. What is the idea behind the false start drain being only in the lower cans? Is it gravity or what? Also I noticed that the dead bottom can (that is can 7) has a bigger false start drain pipe than the...
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    3-Way Purge Valve Passing Liquid to Liquid Fuel Nozzle

    I forgot to mention 2 points. first, usually we don't run the unit on liquid. it is safe to say that we don't touch the unit from April to September due to the high demand load on hot days. we run it on cold days only, but we use re-circulation all around the year. second, the false start...
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    3-Way Purge Valve Passing Liquid to Liquid Fuel Nozzle

    Greetings, One of our 7FA turbine had high dynamic pressure in can 3 and 4 while running on natural gas and the liquid fuel re-circulation was on. Now the unit is off, and while liq fuel re-circulation is on, the 3 way valve is passing liquid fuel to the liquid fuel nozzle and combustor and...
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    Questions on Lift Oil and Effect of Orifice Pressure

    Greetings, 1.We have 7 FA turbine, the lift oil pressure is 3500 psig, and the lockable flow control valve is adjusted so that the shaft is lifted by 5 mils approximately.I wonder what would happen to the pressure of lift oil if we increase the lifting distance and put is for example 7 mils...
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    3 Way Valve Drain Port "Vent"

    > If the 3 way valve is a pilot (operates by air another > larger valve), it has to have a vent to let the air out (let > it bleed to zero). thank you, yes the valve is operated by air. this valve has a test procedure to insure the valve is working properly. it is written that the pressure...
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    3 Way Valve Drain Port "Vent"

    >What does the P&ID indicate the vent is for? Well, I am not sure, but maybe the vent air well help pushing the liquid in the drain line, to the false start drain. see the picture in the link. the vent is the blue arrow and the distributor drain is the red arrow. after that they will...
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    Liquid Fuel System Articles

    Thank you dear CSA, I really want to thank you for your time and effort. you always elaborate on the topics and never give a short answer. I wish you all the best.
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    3 Way Valve Drain Port "Vent"

    Greetings, In the liquid fuel system in our power plant, there is a 3 way valve in the turbine compartment that direct either purge air or diesel based on what fuel the turbine is burning. My question is that there is a drain port in the valv,e and it is stamped "vent". this line goes to...
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    Liquid Fuel System Articles

    waiting for you guys, especially you CSA.
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    Liquid Fuel System Articles

    I have seen some articles (for example CCJonline and there are other sites), about water cooled check valve increases the reliability of transfer to liquid fuel when needed. Are these articles talk about the LF system that has re-circulation and benefited from water cooled check valve? or...
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    Lube Oil Pump

    Dear CSA, I really like when you elaborate in your reply. As you said, it is essential to understand the P&ID to fully understand the system. Actually usually when I begin studying a new system, I will not skip the P&ID. Thank you for this advice. Actually we have removed the pump along...
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    Lube Oil Pump

    Thank you for taking time to reply. Apparently, the problem is within the pump. (pump + shaft + discharge) as shown in the link. Thank you again
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    Lube Oil Pump

    Greetings, we had two lube oil pumps (vertical centrifugal pump, 7FA turbine) running @ the same time because if only one is working the pressure would decrease. we have changed the pump with a new one, and the problem was solved. They didn't see any sign of damage or something suspicious...
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    Vacuum at Bearing Housing

    Dear CSA, I really wish you were my mentor in the plant. Is there anyway to get in touch with your more personally than the forum? sorry for this request. I have understood your explanation. Anyway, I was talking about Turbine & generator bearings, if there is any difference in the...
  18. A

    Generator Humming Sound

    Thank you CSA, >It definitely sounds as if something is loose; possibly stator through-bolts? >Hope your outage is soon. yeah, it is not far. Hopefully, I will provide you with the feedback.
  19. A

    Vacuum at Bearing Housing

    Greetings, What is the real purpose behind keeping the bearing housing at vacuum? and what would happen if the we lost the vacuum? Thank you
  20. A

    Generator Humming Sound

    Any ideas? It is not the same sound as the one found in transformers Actually the sound gives you a feeling like something is shaking. >I forgot to say that there were no vibration detected by the >two vibration measurement devices.
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