Q-Pumps QIS Series User manual

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

2
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
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.
ABOUT THIS MANUAL ......................................................................................................................................................... 3
Q-Pumps S.A. de C.V. Warranty.................................................................................................................................. 3
SAFETY ........................................................................................................................................................................................ 4
IMPORTANT SAFETY INFORMATION ...................................................................................................................... 4
INSTALATION ........................................................................................................................................................................... 5
DESCRIPTION....................................................................................................................................................................... 5
INSTALLATION GUIDELINES........................................................................................................................................ 5
ASSEMBLY PRELIMINARIES ......................................................................................................................................... 6
QIS GENERAL DIAGRAM...................................................................................................................................................... 7
QIS PART LIST .......................................................................................................................................................................... 8
ASSEMBLY ................................................................................................................................................................................. 9
START THE ASSEMBLY................................................................................................................................................... 9
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 MECHANICAL SEAL..........................................................................................................................14
5. ASSEMBLING THE CASING........................................................................................................................................................17
QUICK GUIDE FOR SOLVING COMMON PROBLEMS ..................................................................................... 19
CONTENTS

3
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
ABOUT THIS MANUAL
To ensure the best performance of your pump, please read this manual before starting it. You will find 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.
Acceso A # 103 Fracc. Industrial Jurica
Querétaro, Qro. Mexico. 76130
Call: [phone]
For Technical support contact:
[e-mail]
For Sales support contact:
[e-mail]
The information in this manual might change without notice, we recommend visiting our website 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 modifications 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 fluids 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 indefinitely, 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.
ABOUT THIS MANUAL

4
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
SAFETY
IMPORTANT SAFETY INFORMATION
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.
Safety labels are placed on every pump. DO NOT remove any labeling on any Q-Pumps product.
Replace any label that is missing.
DANGER
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.
WARNING
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 maintenance practice.
CAUTION
Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious
injury.
SAFETY
C
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5
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
INSTALATION
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 fixed 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 fittings. It should
also be readily accessible for inspection and cleaning.
WARNING
Before servicing pump, disconnect electrical
power source, carefully relieve all pressure
and drain all fluids from pump and connected
piping.
INSTALLATION

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QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
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.
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 different 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 fluids from pump and connected
piping.
INSTA
LLATION

7
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS GENERAL DIAGRAM
GENERAL DIAGRAM
1
2
3 4
5
6
7
9
8
10
12
13
14
18A
18B
17
21
22
19
20
16
209
207
209A
209B
15
6H
6A
6G
6E
6I
6B
6J
6C
6K
6D
6L
6F
6H
6A
6G
6E
6I
6B
6J
6C
6K
Double mechanical seal
Single mechanical seal

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QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QIS PART LIST
ITEM DESCRIPTION QTY ITEM DESCRIPTION QTY
1 Casing 1 10 Stubsahft 1
2 Casing o-ring 1 12 Stubshaft key 1
3 Impeller nut plus 1 13 Stubshaft collar 1
4 Impeller nut gasket 1 14 Collar bolt 1 OR 2
5 Impeller QIS 1 15 Adapter 1
6 Mechanical seal 1 16 Adapter guard 1
6A Rotary holder 1 17 Adapter guard bolt 1
6B Internal rotary face 1 18A
Adapter hexagonal
screw 4
6C Static face 1 18B Adapter hexagonal nut 4
6D External rotary face 1 19 Washer 4
6E Internal rotary spring 1 20 Casing hexagonal screw 4
6F External rotary spring 1 21 Washer 4
6G O-ring rotary holder 1 22
Backplate hexagonal
screw 4
6H O-ring rotary holder 1 207 Leg 4
6I O-ring internal rotary face 1 209 Leg bracket 2
6J O-ring static face front 1 209A Leg hexagonal screw 4
6K O-ring static face back 1 209B
Leg bracket hexagonal
screw 4
6L
O-ring external rotary
face 1 209B
Leg bracket hexagonal
screw 4
7 Backplate 1
8 Plug 2
9 Flush double seal 2
PART LIST

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QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
ASSEMBLY
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) fix the brackets to the motor base; You may need to lift the
motor to make this assembly. Figure A.
FigureA
209B
209A
M
209
207
ASSEMBLY

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QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
2. ASSEMBLY THE ADAPTER TO THE MOTOR
Place the stainless adapter (15) on the motor flange and fix it with hexagonal screws and tighten
to the torque values recommended in chart 1.
Table 1 – Torque values for tightening the adapter screws
Torque ft-lb Models NEMA Models IEC
55 Frame 18 to 25 Frame 110 to 160
70
Frame
28
Frame
180
110 Frame 32 to 36 Frame 200 to 225
For NEMA motors “C” face use the four hexagonal screws (18A). Figure B.
Figure B
For IEC motors “FF” face (B5 flange) use the four hexagonal screws (18A) and the hexagonal nuts
(18B).
Figure C.
18A
15
18A
15
18B
ASSEMBLY

11
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
3. SPACING OF THE IMPELLER AND STUB SHAFT
The correct operation of the pump depends on the separation of the impeller from the backplate
and the fixation of the stub shaft on the motor shaft. Follow the next steps to fix 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 (10) and place it on the motor shaft, it must slide in and out without problem. Figure D.
Figure D
3b. Place and fix the backplate (7) into the adapter using the four hexagonal screws (22) and
washers (21). The orientation of the backplate is with the flushing holes in a vertical position; the
flushes are used only for double mechanical seal.The backplate has a square shape in the back
to keep the mechanical seal static face in place. Figure E.
Figure E
13 10
14
22 21
7
ASSEMBLY

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QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
3c. Now 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 drive collar.
Take the impeller nut (3) and place the impeller gasket (4) on it, then place the impeller (5) 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 and 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 glue O-rings and gaskets to the
metal elements to facilitate assembly.
6A
12
6H
5
4
3
ASSEMBLY

13
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
3d. Once the assembly is tightened place a shim of 0.025”(0.63 mm) or 0.030”(0.76 mm) between
the back of the impeller and the front of the backplate. 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 shim between them and proceed to tighten
the screw or screws on the shaft collar. Use the torque values for tightening the collar screws
indicated in the chart 2. Figure H.
Figure H
Table 2 – Torque values for stub shaft collar Allen screws
Torque ft-lb Models NEMA Models IEC
13 Frame 56 to 18 Frame 80 to 112
30
Frame
21
to
25
Frame
132
to
160
35 Frame 28 to 32 Frame 180 to 225
Now turn the impeller by hand, it must turn without restriction. Check that every vane is separated
the distance indicated.
3e.Using the 3/8”rod and the hexagonal socket and wrench to loosen the impeller nut to remove
the elements previously assembled.
0.025” (0.63 mm)
0.030” (0.76 mm)
Align stub shaft and
collar slots
ASSEMBLY

14
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
Take the impeller nut, impeller gasket, impeller and impeller key off. Do not forget to remove also
the shim used to determinate the stub shaft position. Finally remove the backplate and continue
assembling the mechanical seal (6). Figure I.
Figure I
4. ASSEMBLING THE MECHANICAL SEAL
4a. External seal sub-assembly, double mechanical seal. For double mechanical seal only, insert
the O-ring (6L) into the external rotary face (6D), then locate the external spring (6F) inside the
external rotary face.Be sure the spring tip fits in the notch on the rotary face. Now, slide the
subassembly into the stubshaft; the other spring tip must fit in the notch on the stubshaft. Prepare
the single seal items to assembly following the next steps. Figure J.
Figure J
Note that the internal and the external springs are interchangeable.
4b. Static face sub-assembly, single and double mechanical seal.Place into the backplate (7)
the stationary face of the mechanical seal (6C) with its O-rings (6J & 6K). First place the O-rings on
6F
6L
6D
ASSEMBLY

15
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
the stationary face; the static face has a gutter in the middle between both O-rings, do not block
this, and remember that you can use water or dishes soap to lubricate or glue O-rings and gaskets
to the metal elements to ease assembly. Place the stationary face into the backplate seal housing,
the square shape in both parts must be aligned. Push until the seal surface fully seats on the
housing. Figure K.
Figure K
Place and fix the backplate already with the stationary seal installed into the adapter as in step 3b.
Use torque value to fix the backplate of 6 ft.lb for all the models.Be carefull not to hit the seal
with the stubshaft end.
4c. Internal rotary seal sub-assembly, single and double mechanical seal. Assembly the internal
rotary face (6B), the rotary seal O-ring (6I), internal spring (6E) and rotary holder O-ring (6H) into the
rotary holder (6A). First place the O-ring (6I) into the groove on the rotary holder. Then place the
spring inside the rotary holder taking care the spring tip fits the notch in the rotary holder. Insert
the internal rotary face into the rotary holder. The second spring tip must fit the notch in the
internal rotary face, then compress. Finally place the rotary holder O-ring (6H) in the groove on
the front of the holder. Figure L.
Figure L
7
6K
6C
6J
6H
6A
6E
6I
6B
Gutter
O-ring
6K
O-ring 6J
O-ring 6I
O-ring 6H
ASSEMBLY

16
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
4d.For double mechanical seal it is necessary to add the inside O-ring (6G); place it into the rotary
holder (6A) before placing the spring inside the rotary holder.Figure M.
Figure M
4e. Now, Insert the whole rotary seal sub-assembly into the stub shaft. The seal will contact the
stationary seal face placed previously in the backplate (step 4a). Push to compress the assembly
and then insert the impeller key, put the impeller and tight it with the impeller nut. Do not forget
to place the impeller gasket into the impeller nut.
Tight the assembly as previously did before 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. Figure N.
Figure N
6H
6A
6E
6I
6B
6G
O-ring 6G
ASSEMBLY

17
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
4f. For single mechanical seal do not forget to install the plugs (8) on the flush holes as protection
and for double mechanical seal do not forget to install the flush nipples (9) on the flush holes; use
a pressure around the 5-psi (ideal) to 15 psi (maximum) for the lubrication of double mechanical
seal only. Figure O.
Figure O. Single & double mechanical seal assemblies
5. ASSEMBLING THE CASING
5a. Once the mechanical seal has been installed and the impeller-impeller nut assembly has been
tightened use the four hexagonal screws (20) and washers (19) to fix the casing. Place the casing
O-ring (2) onto the groove on the front of the backplate. Then take the casing (1) and locate it onto
the adapter, position the discharge at the desired location, vertical, 45° or horizontal.To fix the
casing use a torque of 6ft.lb for models 114, 214, 216 & 316, and a torque of 11 ft.lb for models
218, 318, 328, 428, 4410 & 6410. Figure P.
Figure P. Casing discharge orientation.
1
2
19
20
Plugs
Flush out
Flush in
Vertical
45°
Horizontal
ASSEMBLY
ASSEMBLY

18
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
5b. Check turning by hand the impeller it does not rubs against the casing. The assembly may
turn easily without restriction. If there is any sound or sensation of rubbing, you need to check the
whole assembly, disassembly and repeat it again. If everything is fine, to complete the assembly
place and fix the protective guard (16) with a hexagonal screw (17) onto the adapter.
It is highly recommended for safety reasons not to operate the equipment if it is not placed in the
adapter. Figure Q.
Figure Q
5c. Your assembly is complete. Figure R.
Figure R
Notes:
1. Before starting the pump check that the motor turns in a counterclockwise direction.
2. Keep the suction line flooded and the mechanical seal lubricated with the fluid which is
going to be pumped. Never operate the pump when dry or it may damage the seal.
3. Every double mechanical seal must be lubricated with no exception.
4. Maintain enough NPSH available in the suction line to avoid the pump to cavitate.
5. Do not support the weight of the pipe on the pump casing, the pipe must be adequately
supported to avoid this.
17
16
ASSEMBLY

19
QIS SERIES-M03
OPERATION AND MAINTENANCE MANUAL
QIS SERIES Centrifugal Pump
QUICK GUIDE FOR SOLVING COMMON PROBLEMS
Q-Pumps products are relatively easy to maintain with the exception of the sanitary process. Just
as with any other element of machining, problems may arise. This section offers a guide for
identifying and correcting most of the pumping problems. For problems with you motor, contact
the manufacturer directly for best assistance.
The following table illustrates the problems and probable causes, assuming that the pump was
correctly selected for a specific application. If none of the listed solutions provided in the table
resolves the problem, the most likely cause is cavitation. Cavitation may be caused by an incorrect
pump selection and its symptoms include: excessive noise, insufficient pressure, fluid leak and
vibration. If these symptoms are present, please re-evaluate your application.
1. NO FLOW
a) Motor speed too low.
b) Incorrect rotation direction.
c) Obstruction in discharge piping or
closed valves.
SOLUTIONS
a) Check electric connections and motor.
b) Reverse one of the motors three phases. If
direction does not change, contact manufacturer.
c) Remove obstruction and open valves.
2. INSUFICIENT FLOW
a) Motor speed too low.
b) Incorrect rotation direction.
c) Obstruction in discharge piping or closed valves.
d) Impeller damaged
a) Check electric connections and motor.
b) Reverse one of the motors three phases. If
direction does not change, contact manufacturer.
c) Remove obstruction and open valves.
d) Replace impeller
3. EXCESSIVE POWER CONSUMPTION
a) Motor speed too high.
b) Impeller damaged.
c) Motor shaft is bended or worn.
a) Motor wires are bad, replace motor.
b) Remove casing and replace impeller.
c) Replace motor shaft.
4. EXCESSIVE NOISE
a) Magnetic problem with motor.
b) Motor bearings damaged.
c) Foreign particles in impeller.
d) Impeller damaged.
e) Cavitation.
a) Consult motor manufacturer.
b) Replace bearings.
c) Remove casing and extract particles.
d) Replace impeller.
e) Check system’s available NPSH.
d) Cavitation.
5. EXCESSIVE VIBRATION
a) Pump is not leveled.
b) Impeller damaged.
c) Piping lacks supports.
d) Cavitation.
a) Level the pump.
b) Replace impeller.
c) Support suction and discharge piping.
d) Check system’s available NPSH.
6. FLUID LEAK
a) Disposable o-rings.
b) Disposable carbons.
c) Insufficient seal compression.
d) Damaged casing suction/discharge.
e) Disposable casing gasket.
f) Loose clamp assembly.
a) Replace o-rings.
b) Replace carbons.
c) Replace spring.
d) Replace casing.
e) Replace casing gasket.
f) Tighten clamp assembly.
COMMON PROBLEMS

OPERATION AND
MAINTENANCE MANUAL
QIS SERIES
Internal Balanced Mechanical Seal,
Centrifugal Pump
Q-Pumps Inc.
1220 Bammel Road, Houston, TX, 77073
Call: + (832) 957 37 06, [phone]
Q-Pumps S.A. deC.V.
Acceso A #103 Fracc. Industrial Jurica
Querétaro, Qro. México. 76130
Call: [phone]
For Technical support contact:
[e-mail]
For Sales support contact:
[e-mail]
en.q-pumps.com