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Hai FSX, Well, what is value of spread 2 and spread 3? Whether one thermocouple is reading high or the region is having different readings? If one thermocouple is more or less then probably thermocouple fault. take care G.Rajesh

Hai Teekay, >>When we checked the small hydraulic filter before the GCV & SRV servo valves, it was clogged. So we cleaned & changed Did you clean and fixed back or totally replaced the hydraulic line filter? (better to replace with new, cleaning may not give sufficient result) >>it...

Hai Teekay, Is there any alarm like "STARTUP FUEL FLOW EXCESSIVE TRIP"? If YES, then servo valve not maintaining the p2 pressure. It could be a servo valve problem. Have you confirmed SRV operation by stroke checking? Is there any hunting on trip oil or hydraulic oil systems? Have...

Dear Cris, Do you mean to ask diff. between IGV and VIGV (variable inlet guide vane)? Take care G.Rajesh

>And, pray tell, when is the next HGPI? May be in next year between Jan to March. Take care G.Rajesh

Dear Magdy, Do you have historian at your site? It'll be very useful to get back any small event change. OR have you operator saved any images during trip? (normally they used save images if any abnormal noticed). take care G.Rajesh

Thanks CSA, Yes we agree with you, it could be many reasons. In next HGPI we'll replace hot gas path parts and we'll write you back about the performance. take care G.Rajesh

Dear CSA & all, Thank you for your feedback. >>So, if that's true, what is the FSR for each of the two machines at Base Load?<pre> UNIT DATE FSR (%) GT-2A 29-Nov-11 __________62.88 GT-2B 30-Nov-11 __________60.62 GT-2B 16-Apr-12 __________67.63</pre> As you guessed unit with lower...

Dear Johnston, Thanks for your feedback. We are having dual fuel selection (liquid / gas) but liquid for only backup. The readings which was provided on natural gas. GT-2A 29-Nov-11 106.1 550 550 551 551 10.3 32926 30 GT-2B 30-Nov-11 103.03 561 562 561 561 9.77 31864 30 If we look...

Wow, fantastic reply by CSA. Keep it up your good work take care G.Rajesh

Dear calvein, could you provide the alrams which occured during trip? Take care G.Rajesh

Dear Ibrahim, Sometime, it may happen, if anyone exhaust thermocouple read very high temperature. Please look the trip history and see all the exhaust temperature parameters. In your case it tripped after 25 MW, may be with spread issue. take care G.Rajesh

Dear CSA, Thank you for your feedback. We have measured many times and confirmed it values (at differnent blades). Moreover after this auto calibration only our exhasut temperature and CPD were matching with the other unit (earlier 10 deg.C more and 0.5 bar less). The above problem...

Dear All, If anybody having a thought, why IGV angle moved to 28 deg.c, please share with us. Take care G.Rajesh Thank you

Dear All, We have inspected our IGV during the past maintenance and observed closed angle is only 28 deg and full open is 84 deg. We have done auto calibration and checked again with Speedtronic against real IGV position and confirmed both are matching exactly. After this calibration, we...

Dear CSA & All, Once again thank you for your information. The quoted amount for the servo tester is 23K Euros (almost equal to 12 new servo valve price). Hence we decided to purchase BUT still we are analysing the situation as you mentioned. We'll keep you update in future. Take...

Dear CSA & all, Please view the following link for more details about servo valve tester. if have any idea please share again. http://dietzautomation.com/download/Valve%20Expert%2001%20-%20English.pdf Take care G.Rajesh

Dear CSA & All, Thank you very much CSA for your detailed reply Well, we intend to have servo valve tester because we are having 40-50 servo valves which replaced in the past. (We have 3 frame-6B & 2 frame-9E). We are not sure all may not bad. To test all the servo's the kit may helpful...

We too learnt about LZZ. Thanks CSA take care G.Rajesh