SEAL (PACKING) REPLACEMENT
CB5A-021 page 20/24
Assembly
e. Clean the seal cup in a suitable solvent. Inspect
the bore for wear, roughness, or corrosion.
f. Refer to the sketch of the lower packing box for
the proper location and orientation of the
packing components, then install the packing
rings, washers, and spring. Install the retainer
ring while using the handle end of a screwdriver
to compress the packing spring.
g. Install the S3R seal in the seal cup as shown in
figure 14a. Place the S3R seal on the packing
installation tool in the order shown in figure 14b,
with the upper segment toward the tapered end
of the installation tool. Insert the installation
tool, with the S3R seal, into the seal cup, with
the tapered end toward the packing rings.
Place seal cup cover on seal cup and secure
with two capscrews
h. Install the O-ring on the seal cup. Secure the
seal cup to the packing box with eight
capscrews.
Figure 14a – Seal Cup Assembly
Figure 14b - S3R Oil Seal Installation
6.
Two-Seal Packing Box Assembly
a. Install the inner retainer ring of the lower
packing.
b. LB162B, LB362C, LB602B – Install the packing
rings, spring, washers, and the second retainer
ring. To ease installation on the second retainer
ring, use a screwdriver handle and press on the
last washer to compress the seal spring slightly.
LB602C –Attach the S3R seal cup assembly to
the bottom of the packing box.
c. Insert the oil deflector ring (excluding LB602)
through the top of the packing box, flat side
down, into the cavity between the upper and
lower packing. The oil deflector ring will be
positioned between the two sets of packing.
d. Install the upper packing set starting with the
inner retainer ring.
7.
Packing Break-in
The lower packing MUST be manually lubricated
with oil several times during the first 60 minutes of
compressor operation to prevent overheating of the
piston rods and potential damage to the packing
material. If possible, perform the packing break-in
at a lower speed – 400-500 rpm.
To lubricate the packing:
a. Remove the inspection plate from the crosshead
guide.
b. Run the compressor for 5 minutes then
stop
the
compressor for 5 minutes to allow adequate
cooling of the piston rods.
c. Using a small oil can, lubricate the piston rods
each time the compressor is
stopped
.
Do not insert objects or fingers in
inspection cavity. Can cause severe
personal injury
Hazardous
machinery can
cause serious
personal injury.
Improper seal installation could release
explosive gas to the atmosphere
creating an explosion hazard, possibly
causing severe personal injury or death.
Hazardous gases
can cause property
damage, personal
injury or death
8. Proceed according to steps 5 through 15 of the
"Compressor Assembly" section.
