Instruction Manual

Instruction Manual
D100401X012
EZ Valve
June 2014
11
serial card provided with this product. Use of unapproved materials and parts could lead to stresses exceeding the design
or code limits intended for this particular service. Install studs with the material grade and manufacturer's identification
mark visible. Contact your Emerson Process Management representative immediately if a discrepancy between actual
parts and approved parts is suspected.
11. Install bolting, using accepted bolting procedures during tightening so that the body-to-bonnet joint can
withstand test pressures and application service conditions. The bolt torques in table 2 may be used as guidelines
unless accepted bolting procedures dictate otherwise.
12. Install new packing and the metal packing box parts according to the appropriate arrangement in figure 3, 4, or 5.
If split-ring packing is being added, alternatethepositionofthesplitstoavoidaleakpath.Placeasmooth-edged
pipe over the valve stem and gently tap each soft packing part into the packing box, being sure that air is not
trapped between adjacent soft parts.
Installation of graphite ribbon packing requires special care to avoid trapping air between the rings. Start with only one
ring at a time without forcing the top of the packing ring below the bottom of the entrance chamfer of the packing
box. Thus, when a ring is added, the stack should not be pushed into the cavity more than the thickness of the added
ring.
13. Slide the packing follower, upper wiper, and packing flange (keys 13, 12, and 3, figure 11) into position. Lubricate
the packing flange studs (key 4, figure 11) and the faces of the packing flange nuts (key 5, figure 11). Install the
packing flange nuts.
Note
The torque values discussed in step 14 and shown in table 3 are recommended guidelines only and are presented as a starting
point for this procedure. Tightening the packing flange nuts to a torque value that exceeds the table guidelines, in order to obtain
a seal, may indicate other problems.
14. For spring-loaded PTFE V-ring packing, tighten the packing flange nuts until the shoulder on the packing follower
(key 13, figure 11) contacts the bonnet.
For graphite packing, tighten the packing flange nuts to the maximum recommended torque shown in table 3. Then,
loosen the packing flange nuts, and retighten them to the rec ommended minimumtorqueshownintable3.
For other packing types, tighten the packing flange nuts alternately in small equal increments until one of the nuts
reaches the minimum recommended torque shown in table 3. Then, tighten the remaining flange nuts until the
packing flange is level and at a 90-degree angle to the valve stem.
For ENVIRO-SEAL or HIGH-SEAL live-loaded packing, refer to the note at the beginning of the Maintenance section on
page 5 of this manual.
15. Mounttheactuatoronthevalvebodyandreconnecttheactuatorandvalvestemaccordingtotheprocedurein
the appropriate actuator instruction manual.