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We have using 2 nos 2*30MW GE make Gas turbine Frame VI which faces frequent ratchet trouble during shut down or cooldwn ON process and though 88HR running pressure does not built upto 60-70 Kg/cm2. While we press the plunger of 20CS (ratchet SOV) for initial time the pressure built up to 60-70 Kg/cm2 and ratcheting proceeds. We have checked 20CS,33HRF,33CSE,88HR ok.
Is there is problem in "Self Sequencing Block," i.e,.any jam in the two cylinders of "Self Sequencing Block"?
Please suggest and share information regarding this.
chinmoy
Is there is problem in "Self Sequencing Block," i.e,.any jam in the two cylinders of "Self Sequencing Block"?
Please suggest and share information regarding this.
chinmoy