Digital guide
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Woodward 8915-1154
Product Family: 3103 Rotary Sleeve Gas Metering Valve with EM35MR All-Electric Actuator
Verified Family Technical Data (from Woodward official publications):
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Flow Range: 50 to 40,000 lb/h (23 to 18,144 kg/h)
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Maximum Inlet Pressure: 900 psia (6,205 kPa gauge) — enhanced; 720 psia (4,964 kPa) for CE marking
Detailed content
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Differential Pressure: 25 to 900 psi (172 to 6,205 kPa)
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Metered Fuel Types: Natural gas, propane, methane
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Specific Gravity: 0.5 to 1.05
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Gas Temperature: -40°C to +149°C (-40°F to +300°F)
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Actuator Power: 18–32 Vdc, 37 A peak to driver
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Driver: 8200-177 EM 24V Digital Driver (single resolver) or 8200-176 (dual resolver)
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Signal Interface: 4–20 mA, RS-485 (RT SI/O)
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Position Accuracy: ±0.10° digital
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Bandwidth: >5 Hz
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50° Stroke Time: 150 ms open, 80 ms close at 28 Vdc, room temperature
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Explosion-proof: CSA Certified Class I, Division 1, Groups C & D; Not for new ATEX Zone 1 applications when minimum position switch is incorporated
Material & Structure: Stainless steel valve body with through-hardened stainless steel internals; cast aluminum explosion-proof actuator housing; brushless DC motor with samarium-cobalt magnets; planetary gearbox; stainless steel torsional coupling; resolver-type shaft position sensors.
Working Principle: Electronic control signal drives the brushless servo motor through a planetary gearbox, directly turning the 3103 valve metering sleeve via a torsional coupling. The resolver provides non-contact position feedback for closed-loop control. On power loss, the internal spring returns the valve to minimum fuel position.
Note: For exact port size, flange rating, certification variant, and configuration-specific parameters of 8915-1154, consult the Woodward factory or authorized representative with the serial number. The 3103/EM35 family is designated “Not for New Applications” in current Woodward literature — upgrade path is the GS40 or GS50 Series.
