Emerson Rosemount 370XA System Reference Manual page 157

System Reference Manual
7P00370-H01
26.
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Place the two lower actuation diaphragms (1) over the lower
actuation plate so that the diaphragms' holes align with the
holes in the lower actuation plate.
Place the actuation cap (1) over the lower actuation plate.
Insert the hex bolt (1) with its flat washer (2) into the assembled
valve's center hole and hand-tighten.
370XA Gas Chromatograph
APRIL 2014