Woodward 1907
Large Liquid Fuel Valve With EM35 Actuator

The 1907 large liquid fuel valve accurately meters liquid fuel to a gas turbine during acceleration, steady-state operation, and deceleration. The valve may be used for almost any liquid-fueled industrial gas turbine application within its range of fuel flow 68 to 11 340 kg/hr (150 to 25,000 lb/hr). When used in conjunction with an EM35 actuator and EM35 digital driver, the 1907 valve delivers the demanding accuracy needed for DLE applications. The EM35 actuator is all electric, so hydraulic contamination and maintenance problems are eliminated. Cost is reduced since there is no HPU to maintain or replace. In addition, the EM35 actuator is designed for long life, although it may be replaced in the field if necessary. The EM35 actuator is designed for use with both analog and digital EM35 motor drivers. The motor is a brushless dc motor with a motor clutch and gearhead assembly. The motor uses Samarium Cobalt permanent magnets bonded and sleeved to the rotor element. Rotor position sensing is performed through the use of a brushless field director, and motor velocity feed is performed by means of a brushless tachometer.