Instruction Manual

Instruction Manual
D102136X012
KALREZ System - Sliding-Stem Valves
May 2011
3
scratched, nicked, or worn, replace the valve stem before installing the KALREZ Packing System. Check the condition
of the packing bore and clean or hone it out, as necessary. Refer to the appropriate valve instruction manual to replace
the valve stem.
Figure 1. Belleville Spring Stacking Order
A6642
7 SPRINGS
PACKING FOLLOWER
For key number locations refer to figure 3. Then proceed as follows:
1. The original packing flange studs used for standard packing arrangements should be long enough to accommodate
the KALREZ packing parts. If you determine that the existing studs and nuts should be replaced however, due to
their condition, replace them with new studs and nuts (keys 200 and 212).
2. Complete all valve maintenance before installing the KALREZ packing system into the bonnet.
3. Be careful NOT to position the KVSP packing system adjacent to any lubrication holes in the bonnet which could
compromise its sealing performance.
Note
Ensure that the Belleville springs are stacked properly (see figure 1) and packing box parts are assembled in the correct order (see
figure 3). Packing parts cannot function properly if the Belleville springs or other packing parts are not stacked correctly.
4. KVSP packing systems should be installed as a complete set, NOT AS INDIVIDUAL PIECES OR COMPONENTS.
5. All kits include a single use packet of KRYTOXr GPL 206 high performance fluorinated grease to maximize service
life and ease of assembly. KRYTOX lubricants are chemically inert to the chemicals regulated under the U.S. Clean
Air Act, non‐reactive to gaseous and liquid oxygen and chlorine services, with chemical compatibility consistent
with KALREZ and the KVSP Systems.
6. Apply the KRYTOX lubricant liberally to both the I.D. and O.D. surfaces of each packing set component (key 215)
before installing. All exposed surfaces of the packing assembly should be fully covered.
7. Carefully slide the packing down the stem while being careful not to force the packing and damage it on the stem
threads. Use figure 3 to ensure that the packing parts and spring pack are assembled in the correct order.
Tightening Procedures
A modified tightening procedure is recommended for live‐loading the KVSP System to ensure the correct loading
force is used during the life of the packing and to avoid any overcompression of the packing. This procedure also
creates open space within the spring set that allows dynamic movement of the packing system to compensate for any
volumetric changes that occur during thermal cycling.