Finish Thompson GP11 Series Installation And Maintenance Instructions Manual
GP11 SERIES Sealed
Non-Metallic Centrifugal Pumps
Installation and
Maintenance Instructions
ASSEMBLY
Unpack pump from carton and check for shipping damage.
PUMPS WITH MOTOR
No assembly required. Simply unpack the pump and motor and
examine for any shipping damage. If damage is detected, save
the packaging and notify the carrier immediately.
Remove the shipping plugs from the suction and discharge of
the pump and proceed to the “Installation Requirements” section of these instructions.
PUMPS WITHOUT MOTORS
1. Unpack the pump and examine for any shipping damage.
If damage is detected, save the packaging and notify the
carrier immediately. Use the “Supplied and Optional Parts”
section of these instructions to verify that all items have
been received.
2. Prepare to install the pump onto the motor.
a. Remove the protective shroud (Item 22) from the motor
adapter (item 6).
b. Ensure that the set screws in shaft adapter (Item 20)
are loosened to avoid interference when installing.
c. Coat the motor shaft with an anti-seize compound prior
to installation.
3. Properly adjust the spacing between the impeller (item 3)
and the housing cover (item 2).
NOTE: Proper spacing of the Impeller to the housing cover
is critical for performance and to avoid damage to pump
components. A .050” gap is required.
a. Slide the shaft adapter onto the motor shaft until the
impeller is tight against the inside of the housing
cover (look through the pump’s discharge to verify).
Make sure that the shaft adapter’s set screws do not
line up into the motor shaft’s key way.
b. Temporarily bolt the motor adapter to the motor, placing
shims (flat washer - item 10) between the motor
adapter and the motor using two hex-head cap screws
(Item #11) 180° apart (see Figure 1).
c. Tighten the four set screws from the shaft adapter onto
the motor shaft.
d. Remove the two temporary hex-head cap screws and
shim washers.
4. Pull the motor adapter flush against the motor face. Install
Figure 1
four hex-head cap screws and flat washers through the
motor adapter and into the motor and tighten.
5. Verify there is a .050” gap between the impeller and housing cover by looking into the discharge of the pump.
6. Reinstall the protective shroud.
7. Install the pump into your system according to the “Installation Requirements” section of these instructions.
INSTALLATION
MOUNTING
Motor or base plate must be securely fastened.
PIPING
• Always support the piping near the pump to minimize
stress and strain on the pump’s casing.
• Minimize frictional losses by increasing the piping size by
one diameter.
• Use a minimal number of bends, keeping any bends at
least a distance of ten pipe diameters away from the pump.
• Install valves on the suction and discharge lines. Place the
valves within a distance of ten pipe diameters away from
the pump.
• Ensure that the piping is leak free.
• Position the pump as close to the liquid source as possible.
• Maintain a flooded suction at all times.
PUMPS WITH COOLING (PRESSURE) COLLARS
A cooling collar provides a water flush to the pump’s seal. This
is necessary when pumping hot liquids or liquids that tend to
build up or crystallize around the seal faces. If your pump is
supplied with a cooling collar, proper water flow and pressure
are critical to the operation of the pump.
1. Plumb a water supply to the cooling collar. Use 1/8” NPT
threaded holes for the water inlet and drain lines. Either
hard pipe or flexible tubing is suitable.
2. Adjust the water flow and pressure of the flush/cooling
water BEFORE starting the pump.
1
• For pumps with bellows or multi-spring seals, supply
one to two gallons water flow per hour at 1 - 2 psi.
• For pumps with a double seal, supply one to two
gallons per hour water flow at 5 - 10 psi ABOVE the
discharge pressure of the pump.
1. Never run a pump equipped with a cooling collar
2. Do not over-pressurize the cooling collar’s water
CAUTIONS:
without a proper water supply. Doing so will result in
damage to the pump. Use of a flow switch is
recommended.
supply. Doing so can result in damage to pump
components.
SPECIAL PIPING SITUATIONS
SUCTION LIFT
1. Install a priming chamber on the feed side of the pump or
appropriate piping on the discharge for priming the pump.
2. Install a foot valve on the bottom of the suction piping to
maintain a prime to the pump.
PUMPING LIQUIDS WHICH MAY SOLIDIFY OR
CRYSTALLIZE
Add a flush system to the pump’s piping to prevent accumulation of material inside the pump. Install water inlet and outlet
valves as shown in Figure 2. Refer to the “Operation” section of
these instructions for the flush procedure.
CAUTION: Suction prime must be maintained at all
times. Running the pump dry will cause damage to pump
components. To protect the pump if prime is lost, use a
pressure switch on the discharge, a vacuum switch on the
suction, or a motor minder to monitor motor current draw.
d. Jog the motor (allow it to run for only one to two sec-
onds) and observe the rotation of the motor fan. Refer to
the directional arrow on the pump if needed.
NOTE: A pump running backward will run but at a greatly
reduced flow and pressure.
OPERATION
FLOODED SUCTION SYSTEMS
1. Fully open the suction and discharge valves.
2. If a cooling collar is used, turn on the cooling water.
3. Start the pump and verify liquid is flowing. If there is no
liquid flow, refer to the “Troubleshooting” section of these
instructions.
4. Adjust the flow rate and pressure by regulating the discharge valve.
SUCTION LIFT SYSTEMS
1. Fully open suction and discharge valves.
2. If a cooling collar is used, turn on the cooling water.
3. Prime the pump by filling the priming chamber. Allow time
4. Start the pump. Adjust the flow rate and pressure by
FLUSH SYSTEMS
1. Fully close the suction and discharge valves.
2. Connect the water supply to the water inlet valve and con-
3. Turn on the water supply and open the inlet and outlet
4. Close the inlet and outlet valves and turn off water supply.
CAUTION: Never attempt to adjust the liquid flow with
the suction valve. Limiting the suction will result in damage to pump components.
for any trapped air in the suction piping to escape.
reguating the discharge valve.
CAUTION: Never attempt to adjust the liquid flow with
the suction valve. Limiting the suction will result in damage to pump components.
nect a drain hose to water outlet valve.
valves. Flush the system until the pump has been cleared
of any material buildup (approximately 5 minutes).
Figure 2
ELECTRICAL CONNECTIONS
1. Install the motor according to NEC requirements and local
electrical codes. Motor should have an overload protection
circuit.
2. Wire the motor for clockwise rotation when facing the fan
end of the motor.
3. To verify correct rotation of the motor:
a. Install the pump into the system.
b. Fully open the suction and discharge valves.
c. Allow fluid to flow into the pump. Do not allow the
pump to run dry.
SEALS
SEAL REMOVAL AND INSPECTION
1. Disconnect the piping and electrical power from the pump.
2. Disassemble the pump from the motor adapter.
a. Remove the six hex-head cap screws from the
impeller housing. The impeller housing will loosen if
gently tapped at the discharge outlet.
b. Remove the protective shroud from the motor adapter.
c. While preventing the motor shaft from moving (insert
a screwdriver into the motor’s fan), unscrew the
impeller from the motor shaft. Remove the impeller,
seal, cooling collar (if applicable) and housing cover
as one assembly from the motor shaft.
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NOTE: For pumps using a 56C/145TC or motor adapter,
leave the shaft adapter secured to the motor shaft.
3. Remove the seal for inspection.
a. Lubricate impeller’s shaft with rubber lubricant
emulsion or soapy water to allow the seal to slide
easier.
NOTE: Never use a petroleum product for lubrication.
Doing so will effect the seal elastomer’s performance
after reassembly.
b. If no cooling collar is present, carefully remove the
retaining ring that holds the rear of the seal. If
equipped with a cooling collar, carefully slide the
cooling collar off of the Impeller’s shaft.
• With single bellows or multi-spring seals, a
retaining ring holds the seal in place. Carefully
remove the retaining ring.
• With double seals, the cooling collar holds the seal
in place.
c. Remove the seal’s spring. Grasp the rotating head of
d. Remove the housing cover from the impeller.
e. Press the ceramic stationary seat portion of the seal
4. Visually inspect all parts for damage. Replace any parts
• Look for scoring of the seal’s ceramic face.
• Inspect the rotating seal face for wear.
• Check for degradation or chemical attack of any
• Look for signs of heat damage (melted plastic) to the
CAUTION: The seal’s spring is compressed and under
pressure. Use care when removing.
the seal by hand and twist to remove from the
impeller’s shaft.
out of the housing cover.
that appear worn or damaged.
elastomers and other seal components.
Housing Cover and Impeller’s shaft.
SEAL INSTALLATION & PUMP REASSEMBLY
Single Bellows Seal
1. Install the stationary seal face.
a. Lubricate the stationary face’s o-ring with a rubber
lubricant emulsion or soapy water. Keep the polished
surfaces of the seal face clean.
NOTE: Never use a petroleum product for lubrication.
Doing so will effect the seal elastomer’s performance
after reassembly.
b. Carefully press the stationary face into the housing
cover (use a piece of cardboard to protect the seal while
pressing against the stationary face). The smoothest
side of the stationary face should be facing outward.
2. Install the rotating face.
a. Lubricate the impeller’s shaft with a rubber lubricant
emulsion or soapy water.
b. Carefully slide the housing cover over the Impeller’s
shaft. The side of the housing cover with the pressed-
in seal face should be away from the impeller.
c. Separate the rotating head of the seal from the large
spring. Relubricate the impeller’s shaft, then carefully
slide the rotating head of the seal over the Impeller’s
shaft using a twisting motion. The carbon side of the
rotating face should be toward and pressed against the
stationary head of the housing cover.
3. Install the seal’s spring and spring retainer. Compress the
4. Install the assembled seal, impeller and housing cover onto
a. If a cooling collar is being used, slide it onto the
b. Screw the impeller onto the motor shaft or shaft
c. Make certain that the housing cover’s o-ring is in place.
d. Place the impeller housing into position and install the
CAUTION: The carbon portion of the seal is easily
damaged. Take care not to apply uneven force or crack
the carbon while installing.
spring and snap the retaining ring (item #8) into the groove
on the Impeller’s shaft.
the motor bracket.
Impeller’s shaft at this time. Take care to align the
water connections so they are accessible.
adapter.
hardware. Tighten the six hex-head cap screws to 90
inch-pounds.
Multi-Spring Seal
The basic installation procedure for a multi-spring seal is the
same as for the single bellows seal. The exception is that a
multi-spring seal has 4 set screws which need to be tightened
on the Impeller shaft.
Double Seal
1. Remove the motor adapter from the motor’s face (the pump
has previously been removed).
2. Install the stationary seal faces.
a. Lubricate the stationary faces’ o-rings with a rubber
lubricant emulsion or soapy water. Keep the polished
surfaces of the seal face clean.
NOTE: Never use a petroleum product for lubrication.
Doing so will affect the seal elastomer’s performance
after reassembly.
b. Carefully press the stationary faces into the housing
cover and the cooling collar (use a piece of cardboard
to protect the seal while pressing against the stationary
face). The smoothest side of the stationary face
should be facing outward.
NOTE: If using a special seal material, it is vital that the
special stationary seal face is pressed into the housing
cover.
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