Viking Pump TSM230: Hygienic Series - Manual (Page 10)

SECTION TSM 230 ISSUE B PAGE 10 OF 15
17. Install the head nuts to secure the head to the casing.
18. Insert length of plastic through port opening between
rotor teeth to keep shaft from turning. Torque locknut to
value shown in Table 1 using a bearing locknut socket
and a torque wrench. Failure to tighten locknut could
result in premature bearing failure and cause damage to
pump. Remove length of plastic from port opening.
19. Install the end cap into the bearing housing and secure
with the end cap capscrews. Adjust pump end clearance.
Refer to Thrust Bearing Adjustment, page 14.
MECHANICAL SEAL
DANGER !
Before opening any Viking pump liquid chamber
(pumping chamber, reservoir, etc.) Be sure:
1. That any pressure in the chamber has been
completely vented through the suction or
discharge lines or other appropriate openings
or connections.
2. That the driving means (motor, turbine, engine,
etc.) has been “locked out” or made non-
operational so that it cannot be started while
work is being done on pump.
3. That you know what liquid the pump has
been handling and the precautions necessary
to safely handle the liquid. Obtain a material
safety data sheet (MSDS) for the liquid to be
sure these precautions are understood.
Failure to follow above listed precautionary
measures may result in serious injury or death.
WARNING !
DO NOT INSERT TOOLS IN THE VIEWING GAPS
BETWEEN THE CASING AND BRACKET OR
DAMAGE TO THE SHAFT, SEAL, AND BEARING
WILL RESULT.
FIGURE 8
SINGLE SEAL CROSS SECTION
FIGURE 9
SINGLE SEAL ROTARY MEMBER
SINGLE MECHANICAL SEAL
SEAL HOUSING O-RING
ROTARY FACE O-RING
STATIONARY FACE O-RING
SEAL HOUSING ROTARY FACE
STATIONARY FACE
WAVE SPRING
ROTOR
ROTARY
FACE O-RING
ROTARY
FACE
The seal used in this pump is simple to install and good
performance will result if care is taken during installation.
The primary sealing area of a mechanical seal is between
the faces of the rotary and stationary members. These parts
are lapped to a high finish and their sealing effectiveness
depends on complete contact.
Never touch the sealing faces with anything except clean
hands or clean cloth. Minute particles can scratch the seal
faces and cause leakage.
Mechanical Seal Removal:
Use steps 1-2, 4, 6-10, and 12-13 from the disassembly
procedures to remove the mechanical seal components.
The locknut does not need to be removed and the bearing
housing does not need to be adjusted during seal removal.
The bracket and shaft may be left in place to eliminate shaft
realignment after reassembly.
Mechanical Seal Installation:
Follow the rotary and stationary member installation
instructions for the seal type used in the pump. For
mechanically sealed pumps, use steps 24-31 from the
assembly procedures to reassemble the pump. For O-ring
sealed pumps, use steps 8-13 and 15-17 from the assembly
procedures to reassemble the pump. As long as the thrust
bearing was not adjusted, the end clearance should still be
set correctly. Verify the end clearance and adjust if necessary
before putting pump back into service. If the locknut needs
to be retightened or the end clearance needs to be adjusted,
follow the complete assembly procedures. Do not tighten
the locknut or make major (> 0.005”) adjustments to the end
clearance of mechanically sealed pumps while the seal is
installed in order to avoid damaging the seal faces.
SINGLE MECHANICAL SEAL