Viking Pump TSM230: Hygienic Series - Manual (Page 4)

SECTION TSM 230 ISSUE B PAGE 4 OF 15
CLEANING
Determine the on-site pump cleaning schedule for the materials
being processed and the plant maintenance schedule.
COP (CLEAN OUT OF PLACE) RECOMMENDATIONS:
Hygienic Series pumps are suitable for manual cleaning.
Please consider the following when manually cleaning a pump.
1. Use steps 1-4, 6-10 and 12-13 from the disassembly
procedures to remove the wet end components. The locknut
does not need to be removed and the bearing housing
does not need to be adjusted during the disassembly
for cleaning. The idler pin does not need to be removed
from the head and the seal housing does not need to be
removed from the casing unless the O-ring material of
the pump is not compatible with the cleaning solution. For
mechanically sealed pumps where the seal housing is not
removed from the casing, make sure the stationary face(s),
stationary face O-ring(s), and wave spring(s) are removed
from the seal housing to avoid damaging the face(s) during
cleaning. The bracket and shaft may be left in place to
eliminate shaft realignment after reassembly.
2. Submerge and soak wet end components in Clean Out
of Place tank with suitable cleaning solution. Soak pump
components only long enough to ensure adequate cleaning.
WARNING!
IF STEAM IS USED DURING THE CIP CYCLE,
THE PUMP SHOULD NOT BE ALLOWED TO
ROTATE DURING THE STEAMING PROCESS.
WARNING!
ENSURE THAT THE CLEANING SOLUTION
IS COMPATIBLE WITH PUMP COMPONENTS.
PUMP PARTS SHOULD REMAIN IN CLEANING
SOLUTION NO LONGER THAN NECESSARY TO
AVOID CORROSION TO PUMP COMPONENTS.
DRILLED IDLERS:
Some Hygienic Series pumps use a drilled idler and bushing.
For replacement parts, Viking recommends purchasing the
complete drilled idler and bushing subassembly from your
local Authorized Viking Pump Distributor.
PREVENTIVE MAINTENANCE:
Every 6 months or every 2,000 hours of operation,
whichever occurs first:
Re-torque rotor retainer to recommended torque value in
Table 1.
Every 12 months:
1. Replace outer ball bearing.
2. Replace all O-rings including the idler pin O-ring.
3. Inspect and measure pump internals including the
idler pin, idler, idler bushing, rotor, shaft, inner ball
bearing, casing, and seal. Replace as necessary. Pump
Inspection Reports can be obtained from your local
Authorized Viking Pump Distributor.
INSPECTION OF SHAFT AND ROTOR SPLINE:
Each time the pump is disassembled the spline area of the
shaft and rotor should be visually inspected. If the spline of
the rotor or shaft is damaged or worn, replace the damaged
or worn part. If the shaft shoulder next to the spline area has a
sharp edge, use a fine emery cloth to remove the sharp edge
to avoid damaging the seal. Wear to the shaft shoulder and
the back of the rotor is caused by operating the pump with
a loose rotor retainer. It is critical that the rotor retainer
be torqued properly to the value shown in Table 1. Best
practice is to use a calibrated impact wrench or an impact
wrench with a properly sized torque stick.
3. Use new O-rings when reassembling the pump. For
O-ring sealed pumps, use steps 7-17 from the assembly
procedures for O-ring sealed pumps to reassemble the
pump. For mechanically sealed pumps, follow steps
7-9, 13 and 24-31 from the assembly procedures for
mechanically sealed pumps 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.
CIP (CLEAN IN PLACE) RECOMMENDATIONS:
Hygienic Series pumps are designed for in place cleaning.
A partial bypass loop around the pump is recommended to
control the pressure and flow across the pump during the CIP
process. Please consider the following recommendations
when designing and installing a CIP system.
1. Casing must be installed with one port oriented
downward to allow liquid to drain from the casing.
The port with a casing groove needs to be used as
the suction port for the pump’s primary rotation.
2. Differential pressure must be created across the
pump during the cleaning process in order to force the
cleaning solution through the clearances of the pump. A
differential pressure of 15 to 30 psi (1 to 2 bar) across the
pump during the cleaning process is adequate for most
applications.
3. The velocity of the cleaning solution must be sufficient to
clean the entire system. A velocity of 5 ft/sec (1.5 m/s) in
a pipe of equal diameter to the pump port connections is
adequate for most applications. For example in a pump
with 2” ports, the flow rate needs to be 49 gpm (185 lpm).
An additional CIP supply pump may be used if the pump
cannot meet the CIP velocity requirements.
4. It is recommended that the pump rotates during the CIP
process to increase turbulence, which will assist with the
cleaning process.