Flowserve MSS User Manual
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Split Mechanical Seal MSS - Installation and maintenance instructions for machinery parts
6.9 Install the white split backing ring
P1
into the seal ring bore next to the O-ring.
Install the two black elastomer backing rings
P
. Be sure to stagger the backing
ring joints by 10°.
!
Do not bond the backing ring joints together.
6.30 Mount the seal drive halves
5
around the shaft and loosely fasten them together
with the shoulder screws
K1
provided. Line up the pins in the seal drive with the
holes in the rotatig face and slide the seal drive towards the rotating face until a
0.1“ (3 mm) spring gap is achieved using the two 1/8“ Allen wrenches as spacers.
Tighten the shoulder screws completely and lock seal drive to shaft.
Designs that incorporate set screws
57
in the seal drive, after tightening shol-
der screws
K1
, tighten the set screws
57
to lock the seal drive to the shaft.
The seal is now ready for operation.
!
For special problems encountered during installation, contact your nearest
Flowserve Sales and Service Representative or Authorized Distributor.
7.0 Connecting the Seal Support System
7.1 The mechanical seal type MSS is pressurized from the product pressure, see para-
graph 3.1, due to this the connection of a seal support system is inapplicable.
7. A check can now be conducted on the mixer’s sense of rotation (without pressurized
product chamber).
8.0 Starting up the Machine
!
The MSS seal is designed to run dry at speeds of up to 350 rpm. If operated
dry, no special environmental controls are necessary. For wet operation of up to
1750 rpm, make sure that the seal water flush, Plan 3, is adequate to remove
seal generated heat and that the flush is on before start-up of the equipment.
Contact your nearest Flowserve Sales and Service Representative or Authorized
Distributor, for seal flush requirements
!
Parts of the mechanical seal type MSS, which rotate during operation of the
machine, must be secured against contacts, in accordance with the specifica-
tions from the machine manufacturer.
8.1 The mechanical seal type MSS is ready for operation of the machine after it has been
installed.
8. The installed mechanical seal type MSS is bidirectional.