Jordan Valve Mark D & DA Series Globe & Angle Control Valve User Manual
Page 4
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Packing Replacement
Warning
Prior to performing any maintenance
procedures, review the warning notes at the
beginning of the Maintenance section.
1.
Isolate the control valve from the line pressure,
release pressure from both sides of the valve
body, and drain the process media from both
sides of the valve.
2.
Disconnect any operating lines providing air
pressure, control signals or electrical power
to the actuator. Use lockout procedures to en-
sure the above measures stay in effect while
you work on the equipment.
3.
Disconnect the stem connector, and then re-
move the actuator from the valve body by un-
screwing the actuator yoke locknut (Key 4).
4.
Loosen the packing flange nuts (Key 2) so the
packing is not tight on the valve stem. Remove
travel indicator parts and stem locknuts from
the valve stem threads.
5.
Unscrew the bonnet (Key 6) from the valve
body (Key 7). Carefully lift off the bonnet and
plug/stem assembly (Key 19) as a unit.
6.
Remove the plug/stem assembly from the bon-
net. If you plan to re-use the valve plug, pro-
tect the plug seating surface and the stem
threads to prevent damage.
7.
Remove the bonnet gasket (Key 17).
8.
Cover the opening in the valve body to protect
the gasket surface and prevent foreign material
from entering into the valve body.
9.
Remove the packing flange nuts, packing
flange, upper wiper, and follower (Keys 2, 3,
10, and 11). Carefully push out all the
remaining packing box parts from the bonnet
using a rounded rod or other tool that will not
scratch the packing box wall or bottom guide
bushing.
10.
Clean the packing box bore and the metal
packing box parts.
11.
Inspect the valve stem threads and pack
ing box bore for any sharp edges that might
cut the packing. Scratches or burrs could
cause packing box leakage or damage to new
packing.
12.
Install a new bonnet gasket (Key 17), making
sure the gasket seating surfaces are clean
and smooth. Carefully install the plug/stem
assembly into the valve body. Then slide the
bonnet over the stem and thread it tightly into
the valve body, see torque values in Table 3.
13.
Use the sequence shown in Figure 2 to install
new packing and associated parts.
14.
Slip a smooth-edged pipe over the valve stem,
and gently tap each soft packing part into the
packing box.
15.
Slide the packing follower, upper wiper, and
packing flange (Keys 11, 10, and 3) into
position.
16.
Lubricate and install the packing flange studs
(Key 1), and nuts.
17.
For spring-loaded PTFE V-ring packing, tighten
the packing flange nuts (Key 2) until the
shoulder of the packing follower (Key 11) is
approximately 5/8” above the top of the bonnet.
18.
For other packing arrangements, tighten the
packing flange nuts (Key 2) alternately
in small equal increments. Continue until one
of the nuts reaches the minimum torque shown
in Table 1. Then tighten the remaining pack
ing flange nut until the packing flange is level
and at a 90-degree angle to the valve stem.
19.
Mount the actuator on the bonnet (Key 6) and
connect the actuator and valve plug stem ac-
cording to the procedure in the appropriate
actuator instruction manual.
20.
Check for leakage around the packing follower
when you put the control valve assembly into
service. Retighten the packing flange nuts as
required.
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