8577 Auxiliary/Stop Valves

  • 8577 Auxiliary/Stop Valves

    8577 Auxiliary/Stop Valves

Providing fast and reliable shutoff of LOW Btu waste gas fuel flow to the combustion system of a large IGCC industrial or utility gas turbine, the Aux/Stop valves utilize a common design for 12” to 16” line sizes.

APPLICATIONS

The Y&F 8577 Series Control, Stop/Ratio and Aux/Stop valves provide fast and reliable control and shutoff of LOW Btu waste gas fuel flow to the combustion system of a large IGCC industrial or utility gas turbine. 

DESCRIPTION OF OPERATION

The two-way gas fuel control, stop and auxiliary stop valves utilize Y&F's patented high-torqueactuator that maximizes torque at valve opening and closing, with no slamming. The stop/ratio and auxiliary stop valves maintain a constant differential pressure across the control valve addition to providing positive shut off and isolation of fuel. The gas control valve assembly meters the flow of fuel into the gas turbine based on a position command from a controller. 

GENERAL SPECIFICATIONS

Y&F 8577 Series Valves utilize a common design for 12" to 16" line size applications. 

FEATURES

  • Control, auxiliary stop, and stop/ratio valves for large IGCC turbines 
  • Hydraulically actuated, servo controlled 
  • 1200 to 1700 PSI hydraulic pressure nominal; to 3000 psi available 
  • Torques to 55,000 in-lbs 
  • RVDT or LVDT feedback of 0.7 to 3.5 Vrms with 7.0 Vrms input 
  • Independent trip valve 
  • Slew time: 1.5 +/- 0.3 seconds 
  • Failsafe close or open 
  • Patented high-torque amplification at valve opening 
  • 6" stroke (for 16" valves) 
  • Easy access to major subcomponents 
  • Designed for ease of service and maintenance 
  • Certified to North American and European standards for use in hazardous locations.

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