Flowserve ST Series - Manual (Page 2)

2
1 Equipment Check
1.1 Follow plant safety regulations prior to equipment disassembly:
• Consult the plant Material Safety Sheet (MSDS) files
for hazardous material regulation.
• Wear designated personal safety equipment.
• Lock out the mixer or agitator motor and valves to and
from the vessel and seal.
• Relieve any pressure in the vessel.
• Use plant vessel entry procedure if it is necessary
to enter the vessel.
1.2 Secure the mixer or agitator shaft in accordance
with the mixer or agitator manufacturer's instructions.
1.3 Remove the coupling and/or drive to access the seal area.
Follow the manufacturer's instructions.
1.4 Remove the existing seal assembly.
1.5 Remove all burrs and sharp edges from the shaft and vessel
flange area over which an O-ring must slide. The shaft and vessel
flange must be free of burrs, sharp edges, cuts, dents, and corro-
sion that may provide a leakage path past the O-rings as illustrated,
for example, by O-rings 18 and 19 as may be seen in Figure 1.
ST O-ring Gaskets Figure 1
The images of parts shown in these instructions may differ visually from the actual
parts due to manufacturing processes that do not affect the part function or quality.
19
18