Q-Pumps QIS Series User manual

OPERATION AND MAINTENANCE MANUAL
Qis SERIES
INTERNAL BALANCED
MECHANICAL SEAL,
CENTRIFUGAL PUMP
en.q-pumps.com
[e-mail]
02-11

2
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
CONTENT
About this Manual
Q-Pumps Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Important Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Instalation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Instalation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Assembly preliminaries . . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . 6
QIS General Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
QIS Part List 8
Start the Assambly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1. Leg Bracket Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Assembly the Adapter to the Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Spacing of the Impeller and Stub Shaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4. Assembling the Single Mechanical Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6. Assembling the Casing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Common Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Thank you for purchasing a Q-Pumps product
This manual contains installation, operation, cleaning and maintenance instructions
for the QIS Series.
It also includes a part list as well as a troubleshooting chart to assist in determining
pump malfunction and practical advices for the maintenance and operation of the
equipment.

3
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
ABOUT THIS MANUAL
ABOUT THIS MANUAL
To ensure the best performance of your pump, please read this manual before starting it. You
will nd useful information and instructions for the assembly and disassembly procedures
required for the necessary pump maintenance.
For any questions related to the operation, maintenance or installation, please contact your
local distributor or directly to Q-Pumps:
Q-Pumps S.A. de C.V.
The information in this manual might change without notice, we recommend to visit our web-
site for any updates.
Q-Pumps S.A. de C.V. Warranty
Q-Pumps guarantees that all manufactured and sold products are free from defects in materials
and manufacture for a period of one (1) year from the date of shipment. The warranty does not
apply to products which require repair or replacement due to what is considered normal wear.
Conditions caused by normal wear include (but are not limited to standard rotors wear) casing,
mechanical seals, gears and bearings wear.
Accidents, operating errors or improper maintenance are not covered by the warranty. Q-Pumps
assumes no liability for incidental, accidental or consequential damages. The purchaser by
acceptance of delivery assumes all liability for the consequences of use or misuse by it, its
employees or third parties. Unless they are approved in advance, Q-Pumps does not assume
any costs related to parts and / or service.
Q-Pumps disclaims any responsibility for modications or conversions to the pump and the
system. For security reasons and functionality use original parts only. The use of other parts
voids the warranty and excludes liability for any consequences.
The pump is designed only for pumping uids under established characteristics in the
selection sheet. Any other use besides the intended one without the prior written consent of
the manufacturer’s application, will result in disclaim of any responsibility from Q-Pumps.
If the pump is stored temporarily or indenitely, avoid weather exposure and protect the
connection ports with plastic plugs supplied with your pump. Turn the pump shaft by hand
every two months to change the rotating position of the bearings.
Acceso A # 103 Fracc. Industrial Jurica
Querétaro, Qro. Mexico. 76130
Call: [phone]
For Technical support contact:
suppor[email protected]
For Sales support contact:
[e-mail]

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
IMPORTANT SAFETY INFORMATION
Safety is very important!
DO NOT attempt to modify any Q-Pumps product, the QIS series centrifugal pumps
have been designed to be safe and reliable, to do so could create unsafe conditions and
void all warranties.
DO NOT place any Q-Pumps product in an application where general product service
ratings are exceeded. If the maintenance and operation personnel do not observe the
instructions in this manual could result in personal injury or machine damage.
The following DANGER, WARNING, and CAUTION signs and their meanings are used
within these instructions to avoid serious injury and/or possible damage to equipment.
CODE 136530002
(Guard warning)
Safety labels are placed on every pump. DO NOT remove any labeling on any Q-Pumps
product. Replace any label that is missing.
WARNING
ROTATING SHAFT
DO NOT OPERATE
WITHOUT GUARD IN PLACE
Indicates an imminently hazardous situation
which, if not avoided, will result in death or
serious injury. The word danger is used in
the most extreme cases.
DANGER
Indicates a potentially hazardous situation
which, if not avoided, could result in minor
or moderate injury. May also be used to
alert against an unsafe operating or main-
tenance practice.
WARNING
Indicates a potentially hazardous situation
which, if not avoided, could result in death
or serious injury.
CAUTION
CODE 136530001
(Rotating direction ccw)
SAFETY

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
Before servicing pump, disconnect electri-
cal power source, carefully relieve all pres-
sure and drain all uids from pump and
connected piping.
DESCRIPTION
Before servicing pump, disconnect electrical power source.
The QIS series closed-coupled pumps are made up of two sections, power or drive
section and the liquid end or pump section.
The pump is mounted to the frame of the drive motor by means of an adapter, and is
coupled to the motor shaft. The impeller mounts on the stub shaft and is retained by one
of the three methods. The casing is xed to the adapter with screws allowing to position
the discharge outlet at 0°, 45° and 90°. The internal, balanced mechanical seal (single or
double) assures long seal life. The drive motor is mounted on a frame having adjustable
legs providing simple installation and leveling.
INSTALLATION GUIDELINES
UNPACKING EQUIPMENT
Check the contents and all wrapping when unpacking your equipment. Inspect all parts
for damage that may have occurred during shipping. Report any damage to the carrier.
LOCATION AND INSTALLATION
The pump unit should be located as near as possible to the liquid source and in a position
where the suction piping can be short and direct with a minimum number of elbows and
ttings. It should also be readily accessible for inspection and cleaning.
The pump unit as received from the factory is ready for installation. To install it, attach a
hoist if necessary, loosen the set screws in the adjusting leg brackets, and individually
adjust the legs until the pump is leveled. Tighten the set screws.
Attach the suction and discharge piping. Be sure suction and
discharge piping is properly supported to avoid any strain on
the pump casing.
WARNING
INSTALATION

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
INSTALATION
ASSEMBLY PRELIMINARIES
Before beginning the assembly procedure identify every element that is going to be
installed, you can use the exploded view and part list shown in pages 7 and 8. During
the assembly you may need the following tools:
1. 1”, 3/4”, 9/16” and 1/2” Wrenches.
2. 3/16” and 1/4” Allen wrenches.
3. Rubber mallet.
4. Shims with dierent thicknesses: 0.005”, 0.010” and 0.020”.
5. Ratchet handle and sockets 5/8” and 7/8”, – for impeller nut.
6. 3/8” diameter steel rod – to avoid the stub shaft from turning.
7. Torque Wrench.
WARNING
Before servicing pump, disconnect
electrical power source, carefully relieve all
pressure and drain all uids from pump and
connected piping.

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
QIS GENERAL DIAGRAM
GENERAL DIAGRAM
1
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17 18A
18B
21
22
19
20
207
209
209A
209B
M
2
6G
6H
6A
6E
6I
6B
6J
6C
6K
6D
6L
6F
Double
Mechanical
Seal
Single
Mechanical
Seal
6K
6C
6J
6B
6I
6E
6A
6H

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
ITEM PART DESCRIPTION QTY
1CASING 1
2CASING O-RING 1
3IMPELLER NUT PLUS 1
4IMPELLER NUT GASKET 1
5IMPELLER QIS 1
6MECHANICAL SEAL 1
6A ROTARY HOLDER 1
6B INTERNAL ROTARY FACE 1
6C STATIC FACE 1
6D EXTERNAL ROTARY FACE (DOUBLE MECHANICAL SEAL) 1
6E INTERNAL ROTARY SPRING 1
6F EXTERNAL ROTARY SPRING (DOUBLE MECHANICAL SEAL) 1
6G O-RING INTERNAL ROTARY HOLDER (DOUBLE MECHANICAL SEAL) 1
6H O-RING OUTBOARD ROTARY HOLDER 1
6I O-RING STATIC FACE 1
6J O-RING STATIC FACE FRONT 1
6K O-RING STATIC FACE BACK 1
6L O-RING EXTERNAL ROTARY FACE (DOUBLE MECHANICAL SEAL) 1
7BACKPLATE 1
8PLUG (SINGLE MECHANICAL SEAL) 2
9RACOR FLUSH (DOUBLE MECHANICAL SEAL) 2
10 STUBSAHFT 1
11 STUBSHAFT PIN 1
12 STUBSHAFT KEY 1
13 STUBSHAFT COLLAR 1
14 COLLAR BOLT 1 OR 2
15 ADAPTER 1
16 ADAPTER GUARD 1
17 ADAPTER GUARD BOLT 1
18A ADAPTER HEXAGONAL SCREW 4
18B ADAPTER HEXAGONAL NUT 4
19 WASHER 4
20 CASING HEXAGONAL SCREW 4
21 WASHER 4
22 BACKPLATE HEXAGONAL SCREW 4
QIS PART LIST
QIS PART LIST

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
START THE ASSEMBLY
It is highly recommended that you use the general diagram to identify the components and
thus be able to carry out the assemblies and sub-assemblies that will be explained below.
1. LEG BRACKET ASSEMBLIES
The leg bracket assemblies are optional. They allow to level the pumps adjusting the legs
vertically. The size of the brackets (209) and legs (207) depend on the NEMA or IEC motor
frame.
First make the sub-assemblies of the legs to the brackets with the hexagonal screws (209A).
Next, with the hexagonal screws (209B) x the brackets to the motor base; You may need to
lift the motor to make this assembly. Figure A.
Figure A
209B
209A
M
207
209
START THE ASEEMBLY

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
START THE ASEEMBLY
2. ASSEMBLY OF THE ADAPTER TO THE MOTOR
Place the stainless adapter (15) on the motor ange and x it with hexagonal screws and
tighten to the torque values recommended in chart 1.
For NEMA motors “C” face use the four hexagonal screws (18A). Figure B.
Figure B
For IEC motors “FF” face (B5 ange) use the four hexagonal screws (18A) and the
hexagonal nuts (18B). Figure C.
Figure C
Chart 1 – Torque values for tightening the adapter screws
Torque ft-lb Models NEMA Models IEC
20 Frame 56 to 14Frame 80 to 90
55 Frame 18 to 25 Frame 100 to 160
70 Frame 28 Frame 180
110 Frame 32 to 36 Frame 200 to 225
15
18A
15
18A
18B

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
3. SPACING OF THE IMPELLER AND STUB SHAFT
The correct operation of the pump depends on the separation of the impeller (5) from the
backplate (7) and the xation of the stub shaft (10) on the motor shaft. Follow the next steps
to x the stub shaft on the motor shaft:
3a. Position the stub shaft collar (13) with the corresponding Allen screws (14) loosely on the
stub shaft and place it on the motor shaft, it must slide in and out without problem. Figure D.
Figure D
3b. Place and x the backplate (7) into the adapter using the four hexagonal screws (22) and
washers (21). The orientation of the backplate is with the ushing holes in a vertical position;
those holes are used only with the double mechanical seal and the backplate has a square
shape in the back to keep the static face of the mechanical seal in place. Figure E.
Figure E
13 10
14
22
21
7
START THE ASEEMBLY

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
START THE ASEEMBLY
3c. Place only the rotary holder of the mechanical seal (6A) together with its respective
O-ring (6H) until it seats on the shoulder of the stub shaft. Put the impeller key (12) on the
keyway of the stub shaft. The impeller key does not interfere with the mechanical seal rotary
holder.
Take the impeller nut (3) and place the impeller gasket (4) on it, then place the impeller in the
stub shaft and tighten with the impeller nut compressing the assembly. Figure F.
Figure F
Use a 5/8” hexagonal socket for models 114 and 214. Use a 7/8” hexagonal socket for the rest
of models to tighten the nut.
To prevent the stub shaft-impeller assembly from turning you can use a Ø3/8” rod in the bore
that has the stub shaft on its side and thus be able to tighten or loosen the impeller nut.
Figure G.
Figure G
Remember that you can use water or dishes soap to lubricate or stick the O-rings and gaskets
to the metal elements to facilitate assembly.
12
6A
6H
5
4
3
Ø3/8” rod

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
3d. Once the assembly is tightened, place a spacer between the back of the impeller and the
front of the backplate. Use a spacer of 0.025” (0.63 mm) thru 0.030” (0.76 mm) for models 114,
214, 216 & 316, and a spacer of 0.035” (0.89 mm) thru 0.040” (1.00 mm) for models 218, 318,
328, 428, 4410 & 6410. You may use a caliper or some shims to set the critical distance for the
correct performance of the mechanical seal. Keep aligned both, the stub shaft slot, and the
collar slot before tightening the screw (or screws) on the shaft collar. Compress the impeller
against the backplate with the spacer between them and proceed to tighten the screw or
screws on the shaft collar. Figure H.
Figure H
Use the torque values shown in chart 2 to tighten the collar screws. Now turn the impeller
by hand, it must turn with no restriction. Check that every blade is separated the distance
indicated.
Chart 2 – Torque values for tightening the stub shaft collar Allen screws
Torque ft-lb Models NEMA Models IEC
15 Frame 56 to 18 Frame 80 to 112
30 Frame 21 to 25 Frame 132 to 160
40 Frame 28 to 32 Frame 180 to 225
Align stub shaft
and collar slots
0.025” (0.63 mm)
thru 0.030” (0.76 mm)
or
0.035” (0.89 mm)
thru 0.040” (1.00 mm)
START THE ASEEMBLY

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
START THE ASEEMBLY
3e. Use the 3/8” rod, the hexagonal socket and wrench to untighten the impeller nut in
order to remove the elements previously assembled. Take the impeller nut, impeller gasket,
impeller and impeller key o. Do not forget to remove also the spacer used to determinate the
stub shaft position. Finally remove the backplate and continue assembling the mechanical
seal (6). Figure I.
Figure I
Continue to step 4to assemble the single mechanical seal or go to step 5if you are going to
install a double mechanical seal.
4. ASSEMBLING THE SINGLE MECHANICAL SEAL
4a. Place into the backplate seal housing the stationary face of the mechanical seal (6C)
with its O-rings (6J & 6K). First place the O-ring (6J) on the stationary face groove, then the
O-ring (6K) on the back. The square shape in both parts must be aligned. Push until the rst
O-ring fully seats in the housing. Figure J.
Figure J
Place and x the backplate with the stationary seal into the adapter as in step 3b. Use torque
value to x the backplate of 6 ft.lb for all the models. Be carefull not to hit the seal with the
stubshaft end.
7
6K
6C
6J

15
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
4b. Internal Rotary Seal Sub-Assembly
First place the spring (6E) into the rotary holder (6A), the cut side has to be centered with the
pin inside the rotary holder; it is recommended to place the tips of the spring touching the
rotary holder inside surface. Then place the O-ring (6I) in the groove on the rotary holder. Put
the internal rotary seal face (6B) into the rotary holder. The pin must t in the slot of the rotary
seal face. Then compress until the rotary seal face is inserted. Finally place the rotary holder
O-ring (6H) in the groove on the front of the holder. Figure K.
Figure K
4c. Insert the whole rotary seal sub-assembly into the stub shaft, this will contact the
stationary seal face placed previously in the backplate. Push to compress the assembly and
then insert the impeller key into the stubshaft. Assemble the impeller and tight it with the
impeller nut. Do not forget to place the impeller gasket into the impeller nut. Figure L.
Figure L
START THE ASEEMBLY
6B
6I
6E
6A
6H

16
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
4d. Tight the assembly as it is indicated in step 3c. For models 114 and 214 use a torque of
25 ft.lb and a torque of 40 ft.lb for the rest of the models when tightening the impeller nut.
Figure M.
Figure M
5. ASSEMBLING THE DOUBLE MECHANICAL SEAL
5a. To install a double mechanical seal, you must have already performed steps 1to 3and
continue with the following instructions.
Place the external rotary face (6D) with its O-ring (6L) and external spring (6F) onto the
stubshaft (10). The stubshaft has a pin (11) which locks the external rotary seal of the double
mechanical seal.
First insert the O-ring (6L) inside the rotary face (6D) groove, continue placing the spring (6F)
onto the stubshaft until reaching the shaft shoulder passing the spring at the back of the pin.
Finally place the rotary face and O-ring onto the stubshaft and push. The pin must t the
machined slot in the rotary seal face. Figure N.
Figure N
6F
6L
6D
START THE ASEEMBLY

17
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
5b. Place into the backplate seal housing the stationary face of the mechanical seal (6C) with
its O-rings (6J & 6K). First place the O-ring (6J) on the stationary face groove, then the O-ring
(6K) on the back. The square shape in both parts must be aligned. Push until the rst O-ring
fully seats on the housing. Figure O.
Figure O
Place and x the backplate with the stationary seal into the adapter as in step 3b. For all
models, use the torque value of 6 ft.lb to x the backplate. Be carefull not to hit the seal with
the stubshaft end.
5c. Internal Rotary Seal Sub-Assembly
First place the spring (6E) into the rotary holder (6A), the cut side has to be centered with the
pin inside the rotary holder; it is recommended to place the tips of the spring touching the
rotary holder inside surface. Then place the O-ring (6I) in the groove on the rotary holder. Put
the internal rotary seal face (6B) into the rotary holder. The pin must t in the slot of the rotary
seal face. Then compress until the rotary seal face is inserted. Finally place the rotary holder
O-ring (6H) in the groove on the front of the holder. Figure P.
Figure P
7
6K
6C
6J
6B
6I
6E
6A
6H
START THE ASEEMBLY

18
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
START THE ASEEMBLY
5d. Now insert the whole rotary seal sub-assembly into the stub shaft, this will contact the
stationary seal face placed previously in the backplate. Push to compress the assembly
and then insert the impeller key into the stubshaft. Place the O-ring (6G) onto the stubshaft
end; this O-ring seals between the stubshaft, the rotary holder and impeller. Now insert the
impeller and tight it with the impeller nut. Do not forget to place the impeller gasket into the
impeller nut. Figure Q.
Figure Q
5e. When placing the rotary seal onto the stubshaft, it is normal to require some force to
push the assembly due to the action of the two springs. Tight the assembly as it is indicated
in step 3c. For models 114 and 214 use a torque of 25 ft.lb and a torque of 40 ft.lb for the rest
of the models when tightening the impeller nut. Figure R.
Figure R

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OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
START THE ASEEMBLY
5f. Finally place the racor ushes (9) on to the backplate, one on top and one at the bottom.
It is recommended to feed from an external line clean water to the double mechanical seal
with a pressure of 10 to 15 psi maximum. Use the bottom racor as inlet and the top as outlet.
Figure S.
Figure S
Inlet
Outlet

20
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS SERIES-M02
START THE ASEEMBLY
1
2
19
20
1
2
19
20
1
2
19
20
Vertical Position
45 Degrees Inclination
Horizontal Position
5. ASSEMBLING THE CASSING
6a. Once the mechanical seal has been installed and the impeller and impeller nut assembly
has been tightened, place the casing O-ring (2) onto the groove on the front of the backplate.
Take the casing (1) and place it onto the adapter. Position the discharge at the desired location
and use the four hexagonal screws (20) and washers (19) to x the casing. Figure T.
Figure T
To x the casing use the torque value of 6 ft.lb for models 114, 214, 216 & 316, and 11 ft.lb for
models 218, 318, 328, 428, 4410 & 6410.