Instruction Manual

Instruction Manual
D100390X012
ED Valve
October 2014
14
CAUTION
To avoid leakage when the valve is returned to service, use appropriate methods and materials to protect all sealing
surfaces of the new trim parts while assembling the individual parts and during installation in the valve body.
1. Apply a suitable high-temperature lubricant to the inside diameter of the C-seal plugseal.Also,lubricatethe
outside diameter of the valve plug where the C-seal plug seal must be pressed into the proper sealing position
(figure 6).
2. Orient the C-seal plug seal for correct sealing action based on the process fluid flow direction through the valve.
D The open interior of the C-seal plug seal must face up in a valve with flow-up construction (figure 6).
D The open interior of the C-seal plug seal must face down in a valve with flow-down construction (figure 6).
Figure 6. Fisher ED with C-seal Trim
37B1045-A
37B1397-A
FLOW DOWN
FLOW UP
VIEW A
CAVITROL III 2-STAGE
6
6
3
Note
An installation tool must be used to properly position the C-seal plug seal on the valve plug. A tool is available as a Fisher spare part
or a tool could be manufactured following the dimensions given in figure 7.
3. Place the C-seal plug seal over the top of the v alve plug and press the C-seal plug seal onto the plug using the C-seal
installation tool. Carefully press the C-seal plug seal onto the plug until the installation tool contacts the horizontal
referencesurfaceofthevalveplug(figure8).
4. Apply a suitable high-temperature lubricant to the threads on the plug. Then, place the C-seal retainer onto the
plug and tighten the retainer using an appropriate tool such as a strap wrench.