Instruction Manual

Instruction Manual
D103221X012
D3 FloPro Valve
February 2014
12
4. Apply a 3mm (1/8 inch) bead of the supplied high performance fluorinated grease (key 44) around the groove of
the female packing adaptor as shown in figure 5 and install over the valve stem (key 16).
5. Apply a 3mm (1/8 inch) bead of the supplied high performance fluorinated grease (key 44) around the groove of
the packing ring as shown in figure 5 and install over the valve stem.
6. Install the male packing adaptor, lower anti-extrusion washer (key 10), and lower packing spacer over the valve
stem as shown in figure 3.
7. Firmly press all packing parts into the packing bore with a tube.
8. Install the five Belleville springs (key 9) over the valve stem as shown in figure 3.
9. Install the valve plug (key 3) on the stem and insert a new groove pin (key 43).
10. Lubricate the threads of the packing retainer with anti-seize and install into the bonnet using a 1-1/8 inch wrench.
Make sure the Belleville springs are completely enclosed by the packing retainer as shown in figure 4.
11. Torque the packing retainer to 81 NSm(60lbfSft). The packing retainer has been installed correctly when a
metal-to-metal contact has been made between the packing retainer end and the bonnet (key 7). The packing
retainer threads should be completely enclosed by the bonnet.
12. Assemble the valve per steps 9 - 14 in the Spring-to-Open Trim Assembly section of the Valve Plug and Seat Ring
Maintenance section of this manual.
Servicing the Actuator
The D3 FloPro valve is equipped with a spring and diaphragm actuator. The actuator action may be reversed without
the need for additional parts. The number of springs contained in the actuator may have to be adjusted according to
actuator action and/or supply pressure. Refer to table 2 for the proper number of springs for your actuator action and
valve service c onditions.
Actuator Disassembly
Spring-to-Close (Air-to-Open)
Key numbers are referenced in figure 7.
WARNING
Observe the warning at the start of the Maintenance section.
Inspect all parts for wear or damage during disassembly. Replace any worn or damaged parts with genuine Fisher
replacement parts. If the diaphragm is replaced, a new diaphragm O-ring should also be installed.
1. Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body (key 1), and drain
the process media from both sides of the valve.
WARNING
To prevent possible personal injury or property damage from removing the casing cap screws in the wrong sequence,
follow the procedure as outlined below for removing the upper casing.
Be aware as you loosen and remove the actuator casing cap screws that the actuator springs are under compression.