PROCEED HPA 3 Manual de instrucciones descargar pdf (Pagina 29)

Instruction Manual

D101634X012

HP and HPA Valves

October 2014

3. PlacetheC-sealplugsealoverthetopofthevalveplugandpressitontotheplugusingtheinstallationtool.

Carefully press the C-seal plug seal onto the plug until the installation tool contacts the horizontal reference surface

of the valve plug (figure 12).

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.

5. Using an appropriate tool such as a center punch, stake thethreadsontopofthepluginoneplace(figure13)to

secure the C-seal retainer.

6. Replace the piston rings following instructions in the Trim Replacement section in this m anual.

7. Return the seat ring, cage, plug/retainer assembly, and stem to the valve body and completely reassemble the valve

package following the appropriate instructions in the Trim Replacement section in this manual.

CAUTION

To avoid excessive leakage and seat erosion, the valve plug must be initially seated with sufficient force to overcome the

resistance of the C-seal plug seal and contact the seat ring. You can correctly seat the valve plug by using the same force

calculated for full load when sizing your actuator. With no pressure drop through the valve, this force will adequately drive

the valve plug to the seat ring, thus giving the C-seal plug seal a predetermined permanent set. Once this is done, the

plug/retainer assembly, the cage, and the seat ring become a matched set.

With full actuator force applied and the valve plug fully seated, align the actuator travel indicator scale with the lower end

of valve travel. Refer to the appropriate actuator instruction manual for information on this procedure.

Parts Ordering

Each body-bonnet assembly is assigned a serial number, which can be found on the valve body. This same number also

appears on the actuator nameplate when the valve body is shipped from the factory as part of a control valve

assembly. Refer to the number when contacting your Emerson Process Management sales office for technical

assistance or when ordering replacement parts.

When ordering replacement parts, also be sure to include the 11-character part number for each part required from

the following parts list.

WARNING

Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should

not, under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the

performance of the valve, and could cause personal injury and property damage.

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PROCEED HPA 3 Manual de instrucciones Pagina 29