Instruction Manual
D104138X012
D2T FloPro Valve
June 2017
5
1. Remove the six
short
actuator casing cap screws (key 22) first. Once these have been removed from the actuator
assembly, remove the two
long
actuator cap screws (key 30) by alternating between them as you loosen them, to
keep the upper casing (key 21) level during this procedure.
Note
Be aware as you loosen and remove the actuator cap screws that the actuator springs are under compression.
2. Remove the upper casing (key 21) and the springs (key 27).
3. Do not turn the valve stem (key 4) while removing the diaphragm hex nut (key 26). Keep the stem from turning by
using an open end wrench on the machined flats located on the valve stem above the flow adjuster for this
procedure. Continue the actuator disassembly by removing the washer (key 24) diaphragm plate (key 25),
diaphragm (key 19), washer (key 36), and O‐ring (key 37). Inspect the diaphragm for any wear or damage. Replace
with a new one if necessary.
4. Unscrew the socket head cap screws (key 29), and remove the flow adjuster halves (key 14 and 15). Position the
stem (key 4) to its most upward position.
5. Place 2 of the springs (key 27) from the actuator into the bottom casing (key 20), equally spaced, 180 degrees
apart. Place the washer (key 36) over the valve stem, as shown in view A of figure 7. Then place the O‐ring (key 37)
over the valve stem. Next install the diaphragm plate (key 25) and, using the diaphragm plate, correctly position the
actuator springs.
6. Place the diaphragm (key 19) over the stem, along with washer (key 24). Position the diaphragm so the holes in the
diaphragm align with the holes in the bottom casing.
7. Insert a 1/8 inch diameter drift punch, or other suitable device through the 5/32 inch diameter hole in the valve
stem located below the bottom of the previously removed flow adjuster. Install hex nut (key 26) and tighten to 10
N
S
m (90 lbf
S
in). Use the 1/8 inch drift punch or other holding device to turn the stem to align the holes of the
diaphragm (key 19) to the lower casing (key 20).
8. Position the upper casing and install the two
long
cap screws (key 30) opposite one another. Install the six shorter
cap screws (key 22) and the hex nuts, tightening the actuator casing cap screws evenly using a cross‐tightening
procedure. Torque to 10 N
S
m (8 lbf
S
ft).
9. Connect a pressure line to the top actuator pressure connection, and apply pressure to the actuator. Stroke the
actuator until the valve plug is seated on the seat ring. Install the flow adjuster, positioning it to the desired travel.
Tighten the flow adjuster socket head cap screws to 3 N
S
m (26 lbf
S
in).
10. Release the actuator pressure, and install the vent plug (key 28) into the bottom casing pressure connection.
Maintenance
Valve parts are subject to normal wear and must be inspected and replaced as necessary. Inspection and maintenance
frequency depends on the severity of service conditions. This section includes instructions for packing and trim
maintenance, and replacing actuator parts.
All maintenance operations can be performed with the valve in the line.
Note
Whenever a gasket seal or O‐ring is disturbed by removing or shifting gasketed parts, a new gasket should be installed upon
reassembly. This is necessary to ensure a good gasket seal, since the used gasket or O‐ring will not seal properly.