Installation Instructions

Instruction Manual

D103597X012

D4 Valve with easy-Drive Actuator

November 2013

The valve stem packing can only be accessed from within the valve body.

Disassembly

1. Disassemble the valve per steps 1 through 12 of the Valve Plug and Seat Ring Disassembly section in this instruction

manual.

2. Unscrew the packing retainer (key 10) from the bonnet (key 5).

3. Remove the five Belleville springs (key 11), packing spacer (key 14), packing (key 13), and two anti-extrusion rings

(key 12) from the bonnet, using a formed wire hook. To aid in packing removal, the stem may be removed.

4. Clean and inspect the packing box wall to ensure that thepackingsurfacesarenotdamaged.Ifthesurface

condition is damaged, and cannot be improved by light sanding, replace the bonnet by contacting your Emerson

Process Management sales office.

5. Inspect the valve stem for scratches or wear, and valve plug for wear or damage. Replace if necessary.

Figure 9. Fisher D4 Packing Installation

VALVE PLUG, BELLEVILLE SPRINGS, AND PACKING RETAINER

CORRECTLY INSTALLED AND TIGHTENED

BELLEVILLE SPRINGS FULLY ENCLOSED BY

THE PACKING RETAINER

PACKING RETAINER

(KEY 8)

UNTIGHTENED,

NOTE THE GAP

FULLY TIGHTENED,

NO GAP

UPPER PACKING

SPACER (KEY 48)