Finish Thompson MSKC User Manual
MSKC SERIES Multi-Stage
Sealless Non-Metallic Centrifugal Pumps
Installation and Maintenance Instructions
ASSEMBLY
WARNING: Magnetic field hazard. This pump contains
powerful, rare earth magnets. When the pump is disassembled
(not connected to a motor) and the magnets are exposed, these
magnets produce powerful magnetic fields. Individuals with
cardiac pacemakers, implanted defibrillators, other electronic
medical devices, metallic prosthetic heart valves, internal wound
clips (from surgery), metallic prosthetic devices or sickle cell
anemia must not handle or be in the proximity of the magnets
contained inside the pump. Consult a health care provider for
specific recommendations before working with this pump.
Unpack Pump, Drive Magnet Assembly and Hardware Package
from carton and check for shipping damage.
PUMPS WITH MOTORS
Proceed to Installation Section.
PUMPS WITHOUT MOTORS
(56C frame)
1. Remove pump, drive magnet assembly and hardware package
from box.
CAUTION: Keep away from metallic particles, tools and
electronics.
CAUTION: Drive magnets MUST be free of metal chips.
2. Slide drive magnet assembly (item 10) onto the motor shaft
until it is between 3.110” and 3.120” as measured from the
motor face to the top of the drive magnet assembly. See
Figure 1. Align cone point set screw (item 10B) with key slot
on the motor shaft and tighten both set screws with a 5/32”
Allen wrench to 140 in-lbs. (15.8 N-m).
CAUTION: Do not operate/test the motor with the drive
magnet assembly exposed.
WARNING: Magnets are strong. To avoid damage and pinch-
ing fingers, tightly grasp pump assembly keeping finger tips
away from the area where the motor adapter and motor meet.
3. Carefully slide the pump assembly over the drive magnet
assembly. Orient the discharge port to either the 12 or 9
o’clock position. Make sure rabbet (step) on motor is fully
seated into the motor adapter (item 11). Align bolt holes in
motor adapter and motor. Install (4) bolts and washers (items
14A,14B,14C) from hardware package.
4. Manually rotate pump assembly to ensure that the pump is
not binding or rubbing on the drive magnet assembly.
5. Install the pump into the system according to installation
instructions.
Figure 1
PUMPS WITHOUT MOTORS
(71/B14 & 80/B14 frame)
1. Remove pump, drive magnet assembly and hardware package
from box.
CAUTION: Keep away from metallic particles, tools and
electronics.
2. Remove screws and washers (items 12A, 12B & 12C) from
impeller housing (item 1) and remove wet end assembly from
motor adapter (item 11).
3. Install motor adapter onto motor (labels at top) and secure
with motor bolts and washers (items 14A, 14B, 14C) from
hardware package.
4. Slide the drive magnet (item 10) onto the motor shaft so that
the cone point setscrew (item 10B) is aligned with the motor
shaft keyway. Install the drive magnet so that it is recessed
1.016 mm (.040” +/- .005”) below the surface of the motor
adapter (see figure 2). Tighten both setscrews with a 5/32”
Allen wrench to 15.8 N-m (140 in-lbs.).
Figure 2
STRAIGHT
EDGE
DRIVE
T
MAGNE
ASSY.
CAUTION: Do not operate/test the motor with the drive
magnet assembly exposed.
CAUTION: Drive magnets MUST be free of metal chips.
Note: Prior to start-up, double check both drive magnet set
screws to assure that they are firmly tightened. Failure to do so
could result in internal damage. Rotate to assure clearance with
the motor adapter.
WARNING: Magnets are strong. To avoid damage and pinching fingers, tightly grasp pump assembly keeping finger tips away
from the area where the housing and motor adapter meet.
.040”
1
5. Place wet end assembly (comprised of items 1-9) into the
motor adapter (item 11). Grasping the barrier at opposite
bolt tabs, carefully lower the wet end assembly into the motor adapter/drive assembly. Line up the tabs of the wet end
between the tabs on the motor adapter to avoid pinching
fingers. Once seated, rotate the wet end until bolt holes line
up.
6. Align mounting holes and install 6 mounting screws and
washers (items 12A, 12B & 12C) from hardware package.
Hand tighten screws using pattern shown in Figure 3.
7. Rotate motor fan to verify there is no internal binding or rubbing.
8. Install pump into the system according to installation instructions.
1
3
6
5
Figure 3
9. Install valves on suction and discharge lines (a minimum of
10 pipe diameters from the pump).
10. For units in a suction lift system, install appropriate piping in
the discharge to allow priming of the pump.
Note: This pump is not self-priming.
11. The suction valve should be completely open to avoid
restricting suction flow.
CAUTION:
To stop the pump if prime is lost, use one of the following:
(1) pressure switch on the discharge, (2) vacuum switch on
the suction, (3) a power monitor to monitor motor power.
12. When pumping liquids that may solidify or crystallize, a flush
system should be added to the piping. See Figure 4. Install
water inlet and outlet valves as shown.
Note: This pump is provided with a provision for a customer
installed 1/4” NPT drain in the impeller housing. See Drain
Installation Section for details.
Discharge Valve
Suction
Valve
Water Inlet Valve
2
4
INSTALLATION
MOUNTING
Motor should be securely fastened.
PIPING
1. Support piping near the pump to eliminate any strain on the
pump casings.
2. Do not overtighten the piping on the discharge on initial
installation. Damage to the discharge can occur. An o-ring
can be used when there is wear and the plastic threads are
loose.
Note: BSP housings are shipped with an o-ring on the dis-
charge.
3. To minimize head loss from friction:
a. Increase pipe size by 1 diameter.
b. Use minimal number of pipe bends.
4. Keep bends and valves a minimum of 10 pipe diameters from
the suction and discharge.
5. Position pump as close to the liquid source as possible.
6. Maintain a flooded suction (liquid above pump prior to being
primed).
7. Ensure that the piping does not leak and suction is not prone
to clogging.
8. If flexible hose is preferred, use a reinforced hose rated for the
proper temperature and pressure. This helps avoid collapse
or kinks.
Water
Outlet
Valve
Figure 4
ELECTRICAL
Install motor according to NEC requirements and local electrical
codes. Motor should have an overload protection circuit.
IMPORTANT: To verify correct motor rotation:
1. Install pump into system.
2. Fully open suction and discharge valves.
3. Allow fluid to flow into the pump. Do not allow pump to run
dry (PTFE and ceramic bushings cannot be run dry without
damage to pump components).
4. Jog motor (allow it to run for one or two seconds) and observe
rotation of motor fan. Correct rotation is clockwise as viewed
from motor fan. Refer to directional arrow on pump.
Note: A pump running backwards will pump but at a greatly
reduced flow and pressure.
OPERATION
FLOODED SUCTION SYSTEM
1. Completely open suction and discharge valves
2. Start the pump and check liquid flow. If there is no flow, see
the Troubleshooting section.
3. Adjust the flow rate and pressure by regulating the discharge
valve. Do not attempt to adjust the flow with the suction valve.
2
SUCTION LIFT SYSTEM
1. Prime the system by filling the priming chamber and/or suction line with a liquid. Allow time for trapped air to work its
way out.
2. If priming via filling the suction line, close the discharge valve
prior to returning the suction line to the tank.
FLUSH SYSTEMS
CAUTION: Some liquids react with water.
1. Completely close suction and discharge valves.
2. Connect water supply to water inlet valve.
3. Connect drain hose to water valve.
4. Open inlet and outlet valves. Flush system until pump is clean
(approximately 5 minutes).
MAINTENANCE
CAUTION:
Keep the drive magnet and impeller assemblies away from
metal chips or particles.
EXAMINATION
1. Check impeller bushings (item 8A) in both the impeller assembly (item 8) and the impeller drive shaft (item 3), check
both thrust rings (item 2A), both ceramic housing rings, and
both the barrier ceramic post and the first stage impeller
housing ceramic post for cracks, chips, scoring or excess
wear. See figure 5. Replace as required.
2. Check for loose magnets on drive magnet assembly or rubbed
areas on the impeller or barrier assemblies. Contact your
distributor or FTI Technical Service if a problem is found.
3. If you do not remove the drive magnet assembly, check the
set screws for tightness before reassembly.
DISASSEMBLY
1. Disconnect power. Remove electrical wiring and motor
mounting bolts.
2. Close suction and discharge valves. Disconnect piping.
3. Securely hold or clamp motor in place.
4. For 71/80 motor frame pump, skip to step 5. For 56C motor
frame pumps, remove the four motor adapter bolts (item 14A)
and pull the pump end away from the motor/drive magnet
assembly. Set pump end on motor adapter flange with suction facing up.
5. Remove the six screws (item 12A) from the impeller housing.
6. Using a thin bladed screwdriver, gently separate the first
stage housing (item 1) from the diffuser (item 5). Remove
the first stage impeller housing (item 1) being careful to pull
straight off so as not to damage the ceramic front spindle
support. Remove the housing o-ring (item 4). Holding down
on the outside of the diffuser assembly (item 5) with one
hand, gently pull the first stage impeller/impeller drive shaft
assembly (items 2 and 3) from the pump.
7. Remove the diffuser assembly (item 5) and the diffuser o-ring
(item 6) from the top of the second stage impeller housing
(item 7). Remove the second stage impeller housing, the
housing o-ring, the second stage impeller assembly (items
2 & 8), and the barrier (item 9) from the motor adapter (item
11).
8. If the drive magnet assembly (item 10) or the motor needs to
be replaced, do the following. On 56C frame motors, loosen
the two drive magnet set screws (items 10A and 10B) with a
5/32” hex wrench, and remove the drive magnet assembly.
On 71/80 frame motors, insert a 5/32” hex wrench into the
access hole on the top of the motor adapter (item 11) and
loosen the two set screws. Remove the drive magnet assembly from the motor shaft. Remove the motor adapter if
the motor is being replaced.
.020” min.
Figure 5
.415” max.
BUSHING REPLACEMENT
1. To remove the bushing in the second stage, insert 1/16” pin
punch into balance hole (inner circle of 4 holes) of impeller
drive. Gently tap the bushing out of the back of the impeller
drive. The punch may need to be moved to a different hole if
the bushing is difficult to remove.
2. To replace the bushing, clean the impeller bore. Insert the new
bushing into the back of the impeller drive by aligning the
bushing with the impeller bore. Press gently until the bushing
bottoms out (use a block of wood and mallet if necessary).
3. If the bushing in the impeller drive shaft is worn and needs
to be replaced, the complete impeller drive shaft with bushing (item 3) will need to be purchased. Grasp the impeller
assembly in one hand and pull the impeller drive shaft from it.
REASSEMBLY
If the drive magnet assembly (item 10) is to be replaced, install as
follows. On a 56C motor frame, slide the drive magnet assembly
(item 10) onto the motor shaft until it is between 3.110” and
3.120” as measured from the motor face to the top of the magnet
assembly. See figure 1. Align cone point set screw (item 10B)
with key slot on the motor shaft and tighten both set screws with
a 5/32” Allen wrench to 140 in-lbs. (15.8 N-m).
3
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