• Environment:

Operating Temperature:

1. –20 to +105 °C (–4 to +221 °F) (8402-249, 8402-251, 8402-259)
2. –20 to +95 °C (–4 to +203 °F) (8402-250, 8402-255)

Storage Temperature: –40 to +70 °C (–40 to +158 °F)

Vibration: Contact Woodward for vibration qualification data and analysis.

Operating Humidity: ≤ 85% relative humidity, non-condensing

Storage Humidity: ≤ 90% relative humidity, non-condensing

Humidity, Salt Spray, Pressure Wash Resistance, etc: The unit withstands exposure to pressure washing, salt spray, etc., without adverse corrosion or infiltration.

Ingress Protection: IP66

Maximum Altitude: 4000 m

Fuel Gas Specifications:

1. NG = Natural Gas
2. CMM = Coal Mine Ventilation Gas
3. CBM = Coal Bed Methane

• Performance: 

Response (assumes the use of a Woodward In-Pulse control)

1. Time to full open after signal on: 0.0050 second max
2. Time to full closed after signal off: 0.0050 second max

Steady State Flow Rate (with valve in full open condition): See the flow equation defined previously in the sizing section.

Maximum Leakage When Closed: Less than 0.25% of the rated steady state flow rate (i.e., 0.25% of the flow calculated in Steady State Flow Rate above)

Filtration Required: 5 µm absolute max particle size

Expected Maximum Gas Supply Pressure (P1) (not a limiting specification): 450 kPa/4.5 bar absolute (65.3 psi absolute)

Expected Maximum Air Manifold Pressure (P2) (not a limiting specification): 300 kPa/3.0 bar absolute (43.5 psi absolute)

Maximum Gas Manifold to Air Manifold Pressure Difference (the limiting specification: P1 – P2): 150 kPa/1.5 bar (21.7 psi)

Maximum Backfire Pressure Spike (without back-flowing through valve): 50 kPa/0.5 bar (7 psi) above the current gas manifold pressure. Exceeding this by more than 2 bar (29 psi) may damage the valve.

Expected Maximum Gas Supply Temperature: 80 °C (176 °F)