Woodward 8915-1010

Digital guide

Product Description: Based on Woodward’s published 3103/EM35 product platform data, 8915-1010 belongs to the 3103 gas valve paired with EM-35 electric actuator family, designed for industrial gas turbine fuel control. The EM-35 actuator receives electronic controller command signals and uses a fully electric drive system to precisely control the opening of the 3103 gas valve’s rotary metering sleeve, achieving high-precision fuel flow metering and regulation. As a member of the 3103/EM35 series, this unit is fully electric, low-maintenance, and factory-matched and base-calibrated.

WhatApp

WeChat

Detailed content

Technical Specifications (per Woodward 3103/EM35 platform data):

Valve Type: 3103 series stainless steel gas valve
Actuator Type: EM-35 electric actuator
Flow Range: 50–40000 lb/h (approximately 23–18144 kg/h) natural gas
Maximum Fuel Supply Pressure: 900 psia (6205 kPa)
Power Supply: 18–32 Vdc, 25 A to driver
Compatible Drivers: 9907-127 EM35 Digital driver with single resolver feedback; 9907-067 EM35 Analog driver with single resolver feedback
Control Signal: 4–20 mA or signal from a MicroNet PCM (position control module)
Self-cleaning metering port: Yes

Key Features:

Fully electric drive with no hydraulic oil supply required
Brushless DC motor with samarium-cobalt permanent magnets
Fully encapsulated motor stator windings
High-precision resolver for position feedback directly coupled to the metering sleeve
Planetary gear reduction for high torque output
Fail-safe spring return to minimum fuel position on loss of power
Self-cleaning, shear-type metering action resistant to gas condensate and contaminant buildup
Analog or digital control modes
Explosion-proof design, CSA and ATEX certified
Woodward has designated the 3103/EM35 with single resolver configuration as “Not for New Applications,” indicating 8915-1010 belongs to a legacy but supported configuration

Application Scenarios:

Industrial gas turbine fuel control
Facilities without hydraulic oil supply
Explosion-proof zones (Zone 1 / Division 1)
Power generation, petrochemical, oil & gas transmission, and distributed energy sectors

Material Composition:

Valve Body: Stainless steel
Internal Components: Through-hardened stainless steel
Actuator Housing: Cast aluminum explosion-proof enclosure
Motor: Samarium-cobalt permanent magnet brushless DC motor
Coupling: Stainless steel torsion coupling

Structural Characteristics:

EM-35 actuator directly coupled to 3103 valve body via adapter
Rotary sleeve and shoe metering structure
Resolver directly coupled to metering sleeve
Inlet guide tube and redundant sealing design

Working Principle: The electronic controller sends a command signal to the EM-35 driver. The driver energizes the brushless DC motor to produce precise rotation. The motor, after planetary gear reduction, directly drives the 3103 gas valve’s metering sleeve via a stainless steel torsion coupling to change the opening. The resolver detects the actual position of the metering sleeve in real time and feeds it back to the driver, forming a closed-loop position control. On loss of power, the spring returns the valve to minimum fuel position.

Installation Requirements:

Handle the unit carefully during installation to avoid damage to seals and factory calibration.
Protect fuel connection ports when not connected to formal piping.
Configure appropriate fuel filtration (25 micron absolute) at inlet.
Use shielded cable for electrical connections and ground properly according to hazardous location wiring methods.

Usage Notes:

Fuel cleanliness is critical; maintain strict filtration standards.
3-phase motor field director and tach for commutation signal with single resolver excitation and single feedback; features hard overcurrent shutdown.
This configuration is non-preferred and not for new applications per Woodward; not CE certified.
Follow Woodward recommended maintenance intervals for actuator overhaul.