Flowserve MSS Series - Manual (Page 3)

3
Notice: Cleanliness during installation is crucial to the satisfactory
operation of the MSS seal.
Caution: Installation of this seal requires the use of an adhesive to bond
the O-ring secondary seals together. Do not allow the
adhesive to come in contact with skin.
There are two basic models of the MSS seal, Piloted , see Figure 2,
page 4, and Non-Piloted, see Figure 3, page 8.
Seal Chamber Requirements Figure 1
Face of seal housing to be square to the
axis of the shaft to within 0.5 mm (.020 inch)
FIM and have a 1.6 mm (63√ m inch) R
a
finish or better
A
J
B
Sleeve or
shaft finish
to be 0.8 mm
(32√ m inch)
R
a
or better
Shaft or Sleeve
OD ±.02 mm
(±.001 inch)
• Bearings must be in good condition
• Maximum axial movement of shaft (end play) = 0.25 mm (0.010inch) FIM
• Maximum combined shaft eccentricity and shaft deflection at face of housing
total = 3.8 mm (0.150 inch) FIM
First
Obstruction