Practical Pointers | Fives North American

MANIFOLDS, VALVES, LINKAGES

motor arm

connecting rod

motor arm clamping bolt

setscrew "B"

valve control handle

Figure 2

Figure 1

VALVE LINKAGE ADJUSTMENTS FOR A BUTTERFLY OR ADJUSTABLE PORT TYPE VALVE LINKED TO A MODULATING OR 2-POSITION CONTROL MOTOR For Motors with 90 Degree Travel Adjust linkage by trial and error until a setting is found that will give satisfactory high and low points. For Motors with 160 to 180 Degree Travel In using this method, it makes no difference whether low or high rate setting is made first. LOW RATE SETTING 1. Drive control motor to its low rate position. 2. Loosen motor arm clamping bolt to free linkage so motor arm, linkage, and control handle can be moved. 3. Move valve control handle to desired low rate position as indicated by a downstream gauge, and mark the valve pointer position on the valve dial (position "L" on figure 1). 4. Return valve control handle and entire linkage to closed position ("C" on drawing) as formerly, and tighten motor arm clamping bolt on motor shaft.

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