Jordan Valve Mark EZ Series Globe Style Control Valve User Manual

Page 5

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Trim Maintenance

The following procedures describe how the valve trim

can be completely disassembled. When inspection or

repairs are required, perform only those steps neces-

sary to accomplish the task. Refer to the warning at the

start of the Maintenance section.

Disassembly

Key numbers referenced in the following steps are

found in figure 11, unless otherwise indicated.

Remove the actuator and the bonnet according

to steps 1 through 6 of the Replacing Packing

Procedure of the Maintenance section.

NOTE:
To avoid personal injury due to leaking fluids, avoid
damaging gasket sealing surfaces.

The surface finish of the valve stem (key 7) is critical
for making a good packing seal. The inside surface
of the seat ring retainer is critical for smooth opera-
tion of the valve plug.

The seating surfaces of the valve plug and seat ring
(keys 2 and 9) are critical for proper shutoff.

Unless inspection reveals otherwise, assume all
these parts are in good condition and protect them
accordingly. Gasket selection criteria is provided on
page 20 of this instruction manual.

Packing parts can be removed if desired.

Replace these parts as described in the Re

placing Packing procedure.

Valves with Plain or Extension Bonnets

Perform the following steps to remove the valve trim.

Lift the valve plug and stem assembly or the

plug guide, disk retainer, and disk (keys 27,

28, and 29, figure 12) if used, out of the valve

body and set it on a protective surface.

With some valve plug sizes and configurations, the
seat ring retainer and bushing assembly (keys 3 and
26, figures 11 and 12) will come out of the valve body
with the valve plug and stem assembly, and in other
valve plug sizes and configurations, the valve plug
or tip will slide through the seat ring retainer and
bushing assembly, leaving the retainer and bushing
assembly in the valve body.

With the valve plug and stem assembly out of

the valve, either slide the seat ring retainer and

bushing assembly (keys 3 and 26), and

gaskets and shim (keys 10, 12, and 25)

up over the valve plug and stem or lift the

seat ring retainer and bushing assembly

and associated gaskets and shim out of

the valve body. If the valve plug is to be

reused, protect the valve plug seating surface to

prevent scratches.

For valves with metal seats,

drive out the pin

(key 8) and unscrew the valve stem (key 7) from

the valve plug (key 2).

For valves with 1/4 and 3/8-inch ports and

composition seats,

refer to figure 13. Drive out

the pin (key 8) and unscrew the valve stem (key

7) from the valve plug guide (key 27).

Unscrew the disk retainer (key 28) from

the valve plug guide. Remove the disk (key 29)

from the valve plug tip (key 30).

For valves with 1/2 through 2-inch ports and
composition seats,

refer to figure 13. Drive out the pin

(key 8) and unscrew the valve stem (key 7) from the

valve plug guide (key 27). Drive out pin (key 31) and

unscrew the tip (key 30) from the valve plug guide. Re-

move the disk (key 29) from the valve plug guide.

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