Instruction Manual

Instruction Manual

D100390X012

ED Valve

October 2014

Figure 2. Lubricator and Lubricator/Isolating Valve (optional)

LUBRICATOR

LUBRICATOR/ISOLATING VALVE

10A9421-A

AJ5428-D

A0832-2

For spring-loaded single PTFE V-ring packing, the spring (key 8, figure 3) maintains a sealing force on the packing. If

leakage is noted around the packing follower (key 13, figure 3), check to be sure the shoulder on the packing follower

is touching the bonnet. If the shoulder is not touching the bonnet, tighten the packing flange nuts (key 5, figure 18)

until the shoulder is against the bonnet. If leakage cannot be stopped in this manner, proceed to the Replacing

Packing procedure.

If there is undesirable packing leakage with other than spring-loaded packing, first try to limit the leakage and

establish a stem seal by tightening the packing flange nuts.

If the packing is relatively new and tight on t he stem, and if tightening the packing flange nuts does not stop the

leakage, the valve stem may be worn or nicked so that a seal cannot be made. The surface finish of a new valve stem is

critical for making a good packing seal. If the leakage comes from the outside diameter of the packing, the leakage

may be caused by nicks or scratches around the packing box wall. If performing any of the following procedures,

inspect the valve stem and packing box wall for nicks and scratches.

Replacing Packing

WARNING

Refer to the WARNING at the beginning of the Maintenance section in this instruction manual.

1. Isolatethecontrolvalvefromthelinepressure,releasepressure from both sides of the valve body, and drain the

process media from both sides of the valve. If using a power actuator, also shut off all pressure lines to the power

actuator,andreleaseallpressurefromtheactuator.Uselock-outprocedurestobesurethattheabovemeasures

stay in effect while you work on the equipment.

2. Disconnect the operating lines from the actuator and any leak-off piping from the bonnet. Disconnect the stem

connector, then remove the actuator from the valve by unscrewing the yoke locknut (key 15, figure 18) or the hex

nuts (key 26, figure 18).