Instruction Manual

Instruction Manual
D103221X012
D3 FloPro Valve
February 2014
10
9. LubricatethebonnetO-ring(key4)withlithiumgreaseandinstallonthebonnet.
10. Apply anti-seize lubricant to the threads on the valve body and bonnet nut (key 5) and the contact surfaces of the
bonnet and bonnet nut flange. Install the bonnet and actuator assembly onto the valve body. Tighten the bonnet
nut until the nut stops turning. A few hammer blows will be required to ensure that the assembly is tight.
11. Pressurize the actuator to a maximum of 2.41 bar (35 psi) to stroke the valve fully closed.
12. Loosen the hex socket head cap screws (key 15) and set the desired flow rate position according to figure 2.
13. Tighten the hex socket head cap screws to 3 NSm(26lbfSin).
14. Relieve pressure to the actuator.
Packing Maintenance
WARNING
Observe the warning at the start of the Maintenance section.
Key numbers are referenced in figure 3.
The valve stem packing can only be serviced by removing the bonnet from the valve body.
Packing Disassembly
Spring-to-Close (Air-to-Open)
1. Disassemble the valve per steps 1 - 8 in the Spring-to-Close Trim Disassembly section of the Valve Plug and Seat
Ring Maintenance section of this manual.
2. 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 (key 7) using a formed wire hook.
3. Clean and inspect the packing box wall to ensure that thepackingsurfacesarenotdamaged.Ifthesurface
condition is damaged and cannot be improved by light sanding, replace t he bonnet.
4. Inspect the valve stem (key 16) and valve plug (key 3) for scratches or wear and replace if necessary.
Spring-to-Open (Air-to-Close)
1. Disassemble the valve per steps 1 - 8 in the Spring-to-Open Trim Disassembly section of the Valve Plug and Seat
Ring Maintenance section of this manual.
2. 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 (key 7) using a formed wire hook.
3. Clean and inspect the packing box wall to ensure that thepackingsurfacesarenotdamaged.Ifthesurface
condition is damaged and cannot be improved by light sanding, replace t he bonnet.
4. Inspect the valve stem (key 16) and valve plug (key 3) for scratches or wear and replace if necessary.
Packing Assembly
The following steps define the proper procedure for installing the packing in a D3 FloPro Control Valve. Improper
packing assembly can lead to poor valve performance. The proper packing arrangement is shown in figure 3.
Spring-to-Close (Air-to-Open)
1. Ensure the upper packing spacer (key 12) is installed.