APS Training Manual

VOLUME CHANGE COMPARISON A conventional actuator and a diamond-shaped actuator are arranged as per "FIGURE 5". The conventional actuator's boundary face area is the same as the area of each of the four equal sides of the diamond-shaped actuator. The valve is closed. The valve is opened causing both the actuators to drive equal distances as per "FIGURE 6". The relationship is linear regarding the volume change relative to travel for the conventional actuator. The relationship is non-linear regarding the volume change relative to travel for the diamond-shaped actuator. For any change in linear travel the diamond-shaped actuator requires less fluid than the conventional actuator achieving identical travels. 13.251 FLUID SOURCE CONVENTIONAL ACTUATOR DIAMON-SHAPED ACTUATOR HINGE (TYPICAL) FIGURE 5 FIGURE 6 EQUAL TRAVEL FLUID SOURCE VALVE CONVENTIONAL ACTUATOR DIAMOND-SHAPED ACTUATOR

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