Instruction Manual

Instruction Manual
D103221X012
D3 FloPro Valve
February 2014
6
4. Tighten the hex socket head cap screws to 3 NSm(26lbfSin).
5. Relieve pressure to the actuator, shut off all pressure lines to the actuator, and disconnect. U se lockout procedures
to ensure the above measures stay in effect while you work on the equipment.
6. 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.
7. Completely remove the packing retainer (key 8) using a 1-1/8 inch wrench.
8. Remove the valve plug by driving out the pin (key 43) and unscrewing the valve plug from the stem. Utilize a 1/8
inchdriftpunchintheholesprovidedonthestemtokeepthestemfromturningastheplugisremoved.Donot
remove the Belleville springs (key 9) from the stem, in order to retain the Belleville stacking orientation as shown in
figure 3.
9. Use a 1-3/16 inch socket wrench to loosen and remove the seat ring (key 2).
CAUTION
Inspect the seat ring and valve body interior for wear, erosion, or damage in the following steps.
10. Inspect the seat ring for wear or damage. If the seating surface has been damaged, discard the seat ring.
11. Visually inspect the valve body interior below the seat ring for erosion or damage. Replace the valve body if
necessary.
WARNING
Becarefultoavoiddamagingtheseatingsurfaceonthevalveplugorseatringasdamageintheseareaswillallow
excessive leakage at shutoff. Avoid damaging the highly polished valve stem surface. A damaged valve stem could cut the
packing and allow process fluid to leak to the atmosphere.
Cover the opening in the valve body to prevent foreign material from getting into the valve body cavity.
Spring-to-Open (Air-to-Close)
Key numbers are referenced in figure 8.
1. Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body (key 1), and drain
the process media from both sides of the valve.
Note
The following steps are intended to ensure the groove pin is fully exposed below the bonnet to allow you to remove the pin before
removing the valve plug.
2. Pressurizetheactuatortoamaximumof2.41bar(35psi)tostrokethevalvefullyclosed.Thiswillseatthevalve
plug (key 3) and expose the top of the serrations on the valve stem (key 16).