Instruction Manual

Instruction Manual
D103221X012
D3 FloPro Valve
February 2014
14
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.
2. Remove the ten short actuator casing cap screws (key 29) and the two long actuator casing cap screws (key 31).
3. Remove the upper casing (key 32).
4. Lubricate the threads above the stem nut (key 27) with anti-seize lubricant to prevent galling of the threads.
WARNING
To prevent possible personal injury or property damage, be aware as you loosen and remove the stem nut that the actuator
springs are under compression.
5. Relieve spring tension by slowly removing the stem nut. Do not allow the valve stem (key 16) to turn while
removing the stem nut. Keep the valve stem from turning by inserting a 1/8 inch drift punch in the holes provided
on the valve stem.
6. Remove the diaphragm washer (key 22), diaphragm (key 23), diaphragm plate (key 24), diaphragm O-ring (key 19),
and actuator spacer (key 26).
7. Remove the bonnet locknut (key 20) with a 1-1/2 inch socket wrench and lift off the l ower casing (key 21).
8. RemovethecasingO-ring(key17).
9. Break the bonnet nut (key 5) loose with a hammer. Continue turning the bonnet nut by using a hammer or a large
adjustable wrench, tightened around one ear of the bonnet nut. If the bonnet (key 7) is stuck in the valve, continue
to unscrew the bonnet nut. The bonnet nut will contact the spring pins (or pipe plugs) (key 6, figures 7 or 8) and
jack the bonnet out of the valve. Carefully lift the actuator assembly from the valve body.
WARNING
The spring pins/pipe plugs (key 6) must a lways be in place during valve operation. They provide a safeguard against injury
when the unit is being disassembled.
10. Completely remove t he packing retainer(key8)usinga1-1/8inchwrench.
11. Remove the valve plug (key 3) by driving out the pin (key 43) and unscrewing the valve plug from the stem. Utilize
a 1/8 inch drift punch in the holes provided on the stem to keep the stem from turning as the plug is removed.
12. Remove the five Belleville springs (key 9), lower packing spacer (key 12), packing set (key 11), and two
anti-extrusion washers (key 10) from the bonnet using a formed wire hook.
13. Completely remove the flow adjuster (keys 13, 14, and 15) from the valve stem.
14. Removethevalvestemfromthebottomofthebonnet(key16).
CAUTION
The valve stem must be removed to replace the stem O-ring and the bonnet bushing. If the valve stem is removed, the valve
packing must be replaced since the threads on the valve stem may damage the packing when the valve stem is removed.