Tri-Clover C216 - Maintenance; Type D or F Seals External Balanced

8
MAINTENANCE
TYPE D OR F SEALS EXTERNAL BALANCED
DISASSEMBLY, CLEANING (GENERAL)
It is necessary to disassemble parts of the pump for cleaning and sanitizing. For Tri-Clover pumps
equipped with the “Groove-In-Shaft” design (types D, DG, or F seals only), it is not necessary to
disassemble if used in Clean-In-Place installation.
The extent of disassembly will depend on the application, and the type of seal used in your pump. To
disassemble, disconnect the suction and discharge piping. Remove seal guard assembly with a
wrench of appropriate size. Turn the wing nut on the clamp assembly until tension on the clamp
saddle is relieved. Open the saddles and remove the casing. At this point the disassembly varies
depending on the impeller retaining system applicable to your pump.
For floating retainer models
Push back on the impeller and center the retainer in the stub shaft. Slide the impeller forward and
remove it. Do not try to remove retainer before removing impeller as this will cause damage to the
retainer, shaft and impeller.
For threaded shaft models
Remove cotter pin and turn castellated nut in counterclockwise direction. Remove washer's and
impeller.
For both models
1. Rotate the backplate until the backplate pins clear the pins in the adapter and remove the
backplate.
2. Remove the casing gasket.
Note: Protect the sealing surface of the backplate against nicks and scratches while removing,
cleaning and reassembling.
3. Remove the carbon seal, o-ring seal, seal cup, and spring.
DG/FG CLAMPED IN SEAT
1. Remove four bolt/screws from backplate. Inspect DG seat insert, gland ring, and gaskets for
damage or wear, and replace as required.
Note: #80P outboard and #80R inboard gaskets are NOT INTERCHANGEABLE. #80R (thicker)
gasket MUST be inboard-between backplate and seal seat. Care must be taken to protect
the sealing face of the backplate for D and F seals and the seal seat for DG seals from nicks
and scratches.
2. Remove the carbon seal and o-ring seal. Examine and replace as necessary.
WARNING
Before servicing pump, disconnect electrical power
source, carefully relieve all pressure and drain all
fluids from pump and connected piping.