- 14 -
M A I N T E N A N C E
TYPE A AND B PACKING GLAND SEAL
SEAL REPLACEMENT
The packing gland seals are used in non-sanitary applications. They are available in two styles:
standard packing and water cooled packings. The packings have been designed to give long life
and service free operation. Each packing ring serves a definite purpose and is made to properly
“fit” around the shaft. The packing rings are impregnated to provide lubrication to the surface of
the pump shaft and prevent burning of the packing.
The packing gland seal with water contains a seal cage inserted between the packing rings to
distribute coolant under pressure in both directions, thus sealing the packing along the shaft, and
reducing operating temperatures.
It is not necessary to remove the backplate, which also forms a stuffing box, from the pump to
replace packings. To replace packings:
1.
Remove the split gland nuts and split glands.
2.
Remove the old packings using a packing hook or other suitable tool.
3.
Insert new packing rings into the backplate.
Notes: The packing rings are die formed and must be carefully handled.
The packing rings furnished by Tri-Clover are in a package. The first ring of the packing is
tagged, and the remainder of the rings are to be installed as they are assembled in the
package. The packing rings should be twisted laterally until they slide over the shaft. The
joints in the packing rings should be staggered to minimize leakage.
4.
Replace the split gland and nuts.
5.
Tighten the split gland nuts only until a slight drag is felt on the shaft. If the packings are too
tight they will bind on the shaft causing scoring of the shaft and burning of the packing.
After packing installation, the pump should be brought up to operating temperature, and the split
glands adjusted several times to prevent excessive leakage. The packing gland seal with water
should drip water from the stuffing box at a rate of 8 to 12 drops a minute for best results.
DISASSEMBLY
1.
Remove the two nuts securing the packing gland to the backplate.
2.
Remove the split packing gland.
3.
Slide the backplate containing the packing rings off the shaft.
4.
Remove the casing gasket.
Note:
The packing rings are accurately die formed. Care should be taken when removing the
bakplate so that the packing rings are not damaged.
CAUTION
Before servicing the pump, disconnect electrical power
source, carefully relieve all pressure, and drain all fluids
from the pump and connected piping.
