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11. Position locator ring (60) in counterbore of backplate (6A, B). Make sure antirotation pin (T) engages in
slot in back of stationary seal face.
12. Place one square head bolt (G) through each slot in backplate (6A, B) and through each hole in seal
retainer (9). Secure seal retainer against backplate using two locknuts (F).
13. Assemble backplate assembly to remainder of pump following correct steps in Section 11,
INSTRUCTIONS FOR PUMP ASSEMBLY.
TRIPLE LIP SEAL
A triple lip seal can be used in the same backplates used for shaft packing and mechanical seals. Different drive
shafts are required for the triple lip seal pumps.
The triple lip seal comes from the manufacturer with a small amount of grease between the lips. Do not remove
this grease as it is necessary to provide lubrication to the inner lips on startup.
DO NOT distort the metal casing around the triple lip seal when installing the seal. Be very careful not to damage
or distort the seal lips during installation. Follow the assembly instructions in the IOM and you will have good
service from the seal.
The standard triple lip seal arrangement is good for products that will not solidify when exposed to air. Optional
arrangements are available where a barrier fluid or flush is required to prevent exposure of the triple lip seal to air.
Figure 15.1
37
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