YF 8655 Series Electric Stop/Ratio Valve

  • YF 8655 Series Electric Stop/Ratio Valve

    YF 8655 Series Electric Stop/Ratio Valve

The Young & Franklin 8655 Series Electric Stop/Ratio Valves are designed to regulate fuel pressure and provide rapid fuel shutoff capability.  Fail Safe to closed position is accomplished by the use of two torsion springs.  The actuator is suitable for fuel modules in Class 1 Div 2 Hazardous Locations. 

Line Size
4" Valve
6" Valve
8" Valve
Flow Profile Equal Percentage
Rated Cg (Class IV / Class VI)
10,400 / 11,200
18,400 / 19,700 27,900 / 30,600
Estimated Dry Weight 260 lbs. (118.2 kg) 330 lbs. (150 kg) 450 lbs. (204.5 kg)
Slew Time
≤ 250 ms
Trip Time ≤ 200 ms
Max Gas Fuel Temperature Metal Seat: +450°F (+232°C)        Composite Seat: +300°F (+148.9°C)
Maximum Operating Pressure
Metal Seat: 680 psig (46.88 barg)        Composite Seat: 730 psig (50.33 barg)
Valve Flange Size
ASME B 16.5 Class 300 Flange
Ambient Temperature Range
-4°F to 212°F (-20°C to 100°C)
Mean Time Between Service- Valve
32,000 Hours
Mean Time Between Service- Actuator
128,000 Hours
Valve Materials
Carbon Steel (NACE Compliant)
Bandwidth/Frequency Response
Customizable up to 23 Hz with 3dB attentuation
Independent Feedback
2 LVDTs (Optional)
Motor Coil
Class F insulation (311°F, 155°C)
LVDT Wiring
6.56 ft (2 m) Flying Lead or MIL Connector
Motor Wiring
32.8 ft (10 m) Jacketed Cable
Visual Position Indicator
Ingress Protection
Stem Leakage
Zero Leakage, as shipped
Failure Mode
Spring to drive valve to Safe position (Fail Close)
MIL-STD-810 - Shock and Vibration
4-20 mA Position, -8 to +8 mA Triple Redundant Velocity
Leakage Classification
ANSI FCI 70-2 Class IV (Metal Seat), Class VI (Composite Seat)
Certifications Class 1 Div 2, Group B, C & D, T3

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PDF icon YF 8655 Series ESRV Brochure194.28 KB