IMPORTANT:
Follow all plant procedures and equipment
manufacturer safety practices throughout installation process.
Read all instructions prior to installation.
1. Remove old packing from stuffing box. Stuffing box should
be free of any old packing residue, solids and corrosion left
from the process.
2. Inspect pump sleeve. Sleeve should be in good condition
and free of excessive wear, corrosion or pitting for optimum
packing service life.
3. Clean the packing gland and gland follower. Remove burrs,
corrosion or any residual material which would impede
insertion into the stuffing box.
4. Calculate the packing cross section:
a. Measure the shaft sleeve diameter (or locate and
measure a packing mandrel, an old packing sleeve or
a piece of wood the same diameter as the shaft sleeve).
b. Measure the stuffing box bore.
c. Cross section = (Bore ID – Stem OD) ÷ 2.
5. Wrap the packing around the packing mandrel and mark at
one complete ring.
6. Remove packing from mandrel.
7. Before cutting rings determine which style packing you
want facing the shaft, then cut rings using a 45° skive cut.
8. Each ring should be cut with the arrangement required for
each application. Typical arrangement would be (3) primary
sealer rings (shown in Figure 1 with Black ePTFE facing the
shaft), (1) top end ring, and (1) bottom end ring (shown in
Figure 2).
(See Figure 3 for stuffing box arrangement)
Additional rings may be required to pack the stuffing box. After
each ring is cut wrap them around mandrel to check fit before
proceeding to installation.
DualPac
™
2211
Installation Instructions
EQUIPMENT PREPARATION
MECHANICAL PACKING
INSTALLATION INSTRUCTIONS
CAUTIONS
These instructions are general in nature. It is assumed that the installer
is familiar with mechanical packing and with the plant requirements for
the successful use of mechanical packing. If in doubt, get assistance
from someone in the plant that is familiar with the product, or delay the
installation until a packing representative is available.
All necessary auxiliary arrangements for successful operation
(heating, cooling, flushing) as well as safety devices must be
employed. These decisions are to be made by the user.
The decision to use this or any other Chesterton product in
a particular service is the customer’s responsibility.
Black ePTFE
Yellow Aramid
Figure 1 – Primary Sealer
(SHOWN WITH Black ePTFE SEALING SHAFT)
Figure 2 – End Ring
