Emerson D2 Manuel d'instructions télécharger pdf (Page 18)

Instruction Manual

D103031X012

D2 FloPro Valve

June 2011

and inspect the valve body gasket surface for damage. Visually inspect the valve body interior below the seat ring

for erosion. Replace the valve body if necessary.

To replace the seat ring, first install a new seat ring gasket. Install the new seat ring and tighten to 230 NSm (170

lbfSft).

Cover the opening in the valve body to prevent foreign material from getting into the valve body cavity.

WARNING

To prevent possible personal injury or property damage from removing the casing cap screws in the wrong sequence,

follow the procedure as outlined below for removing the upper casing.

5. Remove the six short actuator casing cap screws (key 22) first. Once these have been removed from the actuator

assembly, remove the two long actuator cap screws (key 30) by alternating between them as you loosen them, to

keep the upper casing (key 21) level during this procedure..

Figure 8. Packing and Belleville Spring Stacking Order (Appendix A)

ANTI-EXTRUSION

RING

PACKING SET

ANTI-EXTRUSION

RING

SPACER

BELLEVILLE

SPRINGS

PACKING

RETAINER

E0784-1

Note

Be aware as you loosen and remove the actuator cap screws that the actuator springs are under compression for the air-to-open

configuration.

6. Remove the upper casing (key 21) and the springs (key 27).

7. Do not turn the valve stem (key 4) while removing the diaphragm hex nut (key 26). Keep the stem from turning by

using an open end wrench on the machined flats located on the valve stem above the flow adjuster for this

procedure. Continue the actuator disassembly by removing these parts: washer (key 24) diaphragm plate (key 25),

diaphragm (key 19), washer (key 36), and O-ring (key 37). Inspect the diaphragm for any wear or damage. Replace

with a new one if necessary.

If you wish to inspect/replace the bonnet to actuator casing O-ring (key 16), mark the orientation of the actuator

pressure connection to the bonnet for later reference (see figure 9). Unscrew the hex nut (key 18) from the bonnet.

Remove the bottom casing (key 20).

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 24

Pas de commentaire

Emerson D2 Manuel d'instructions Page 18