Woodward Mixers and Throttles for Gas Engines

Mixers
Woodward mixers are available for a wide variety of naturally aspirated and turbocharged engines. Woodward mixers provide high homogeneity at very low resistance. All mixers feature robust, simple construction with no moving parts, and can be easily combined with Woodward air/fuel ratio control systems.

D-Series Mixers & Throttle Valves
The Woodward D100 throttle valve is designed to mount directly to the Woodward D100 gas mixer. The combination of throttle valve and gas mixer ensures optimal mixing and excellent control of engines running on gaseous fuels. The Woodward D100 throttle valve is available in a wide variety of configurations covering a wide range of applications.

F-Series ITB Integrated Actuator and Throttle Body
The Woodward F Series Integrated Throttle Bodies (ITB) are butterfly valves electrically actuated by an Woodward F-Series actuator to control flow output. Flow is a function of inlet and outlet pressure, throttle size, and throttle position. Throttle position is proportional to the position demand. The actuator drives the 0-70 degree output shaft to the demanded position based on an internal shaft position sensor. The Woodward F-Series ITB is designed to throttle air or air/fuel mixtures for gaseous engines in industrial and on-highway service. This system is designed for direct replacement of traditional throttle valves, and requires no linkage between valve and actuator. The Woodward ITB contains a return spring to fully comply with US DOT 571.124 specifications. The three
sizes (48, 60, 68 mm) are designed to cover a wide range
of engines.

Flo-Tech ITB Integrated Throttle Body/Actuator
The Woodward Flo-Tech ITB integrated throttle body and actuator is designed for direct replacement of manual throttle bodies, and is designed with flow shaping to assist in engine idle stability. The throttle body will provide equivalent maximum flow rates of standard butterfly throttle bodies of the same diameter. The system contains a return spring to fully comply with DOT 571.124 specifications. Determination of the proper size requires a knowledge of the absolute pressure drops across the valve, the expected temperature of the gaseous media flowing, and the density of the gas. Cv (volume coefficients) are provided to determine the flow vs. angle. For initial testing, a valve body diameter similar to the one typically used on the application can be used. The Woodward Flo-Tech integrated actuator/throttle body requires no actuator or linkage.

ProAct ITB Integrated Throttle Body
The Woodward ProAct ITB integrated throttle body includes 107 mm, 120 mm, and 135 mm bore sizes, and is designed for use with engines in the 1-2 MW range. These large Woodward ITB units are made to couple directly to Woodward's ProAct actuators (an electromagnetic, 75-degree device), and therefore alleviate the problems associated with linkages on gas engines, such as non-linearity and wear. This direct combination of throttle and actuator results in excellent low-load stability and transient characteristics, and requires no hydraulics, pneumatics, or governor gear train.

L-Series ITB Integrated Throttle Body
The Woodward L-Series ITB is a member of Woodward's Integrated Throttle Body family. Several throttle body size configurations (between 25 and 50 mm) are integrated with speed, position, or process control options for use on gaseous fueled industrial engines between 5 and 100 kW (7 and 134 hp). Applications include power generation, refrigeration units, pumps, irrigation, mobile industrial, and gas trim valves. The Woodward L-Series ITB integrated throttle body and speed, position, or process control provides a building block approach to total engine management. This modular design consists of a die-cast aluminum throttle body plus a fully programmable integrated digital control and bi-directional actuator.

Power Flow Integrated Valve Actuator
The Woodward Power Flow is an integrated valve actuator designed for throttling the intake of internal combustion engines. The system is designed to couple to standard market-available fuel mixer series and to standard SAE flanged intake manifolds. Standard models include the PF 31, PF 38, PF 42, PF 50, and PF 60, covering an air/fuel flow range of 125 to 475 ft³/min (3.5 to 13.4 m³/min). This integrated throttle body is adaptable to a fuel injected engine for air control.

Contact GCS for product specifications and technical manuals