Flowserve MSS Series - Manual (Page 2)

2
The MSS seal is a precision crafted split mechanical seal. While it has
been designed for rugged industrial applications and ease of installation,
it does require careful assembly in a clean environment according to the
following installation steps.
The MSS seal is primarily designed to seal agitator shafts and
can be run dry up to 350 rpm or wet up to 1750 rpm. Consult your
nearest Flowserve Sales and Service Representative, regarding other
applications.
1 Equipment Check
1.1 Follow plant safety regulations prior to equipment disassembly:
• lock out motor and valves.
• wear designated personal safety equipment.
• relieve any pressure in the system.
• consult plant MSDS files for hazardous material regulations.
1.2 Remove existing mechanical seal and gland or packing gland
(follower flange) and enough of the compression packing to allow
the MSS stationary face to pilot in box bore.
1.3 Make sure the shaft or sleeve in the seal shaft packing (P) area
and the seal housing bore (B) and face are clean and free of
burrs, cuts, dents or corrosion that might cause leakage past the
rotating face gasket or stationary face mounting O-rings.
1.4 Check equipment dimensions to ensure that they are within the
dimensions shown in Figures 1 and 2 or 3. Critical dimensions
include shaft or sleeve OD (A), seal housing bore (B), and the
distance to the first obstruction (J).
1.5 Check gland bolting to ensure that bolt size (D) and bolt circle (F)
conform to the dimensions shown in Figures 2 or 3.
Tools Needed for Installation
• A 5/32" T-handle or right angle Allen wrench.
• An open or box end wrench of suitable size for the gland bolts.
• Two (2) 1/8" Allen wrenches.