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Case Study

Main Steam Stop Valve

Obsolete product on main steam line of power station.

Challenge

  • Valve was passing after failure of the valve seat.
  • Original manufacturer not supporting the products.
  • Inline repair carried a high level of risk
  • 200 available days from client contact to planned shutdown
  • Valve was required in cast alloy steel with special bore
  • HPHT application – 165 Bar @ 450 Deg C
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Urgent Valve Replacement

Valve replacement required in 24hrs.

Challenge

  • Control system had stopped working in operation resulting in the plant tripping
  • FPS Engineers attended site to carry out inspection and fact finding.
  • Controls bypassed and found the solenoid valve to be the cause of the problem, an actuator leak was also identified.
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Solution

  • FPS contacted a valve manufacturer in Korea with the specs and drawings.
  • Quotation was submitted with 100- day EXW Korea terms
  • Air freight arranged for 4500kg valve
  • FPS engineers received valve at client site and stripped it to allow welding to be completed.
  • Valve rebuilt and commissioned on site.
  • Old valve transported to FPS workshop for machining and development of tooling for other site work
  • Work completed 4 days ahead of client expectation.

Solution

  • FPS contacted a valve distributor for exact replacement.
  • Immediate quotation submitted.
  • Replacement valve sourced and delivered within 4 hours of initial call.
  • FPS engineer on site to replace valve and ensure operation of the actuator.
  • Full actuator repair completed at next shutdown with further issues identified that will require more work in future.