SPX W+ User manual

Instruction Manual
W+ Pump
Read and understand this manual prior to
operating or servicing this product.

453342 ISS 07.2010
Contents: USA
Section Page Description
- 1 Introduction
- 3 Warnings
- 6 Important Warnings
- 8 Sectional Drawing
1 10 Introduction to the W+
1.1 - W+ range
1.2 - W+ pump features
1.3 - Identifying the pump model
2 11 Installation of the pump
2.1 - Positioning
2.2 - Lining up the pipe system
2.3 - Power supply
2.4 - Water supply for water-flushed shaft seal
2.5 12 Connecting steam or steam condensate for aseptic use
3 12 Before start-up
3.1 - Checking the pump body for foreign material
3.2 - Testing the pump
4 13 Putting the pump into service
4.1 - Flushing water/steam/condensate etc.
5 13 Maintenance
5.1 - Checking the shaft seal
5.2 - Replacing the shaft seal
5.3 15 Replacement of motor
5.4 16 Recommended spare parts
6 17 Technical data
6.1 - Maximum permissible outlet pressure
6.2 Required torques
7 Spare parts list and Pump dimensions

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453343 ISS S 07.2010
Congratulations, you are the owner of a quality built item from SPX Flow
Technology. This pump was manufactured by the skilled personnel of a
company which has served the needs of the dairy, food and process
industries for more than 100 years.
The purpose of this manual is to provide instructions for the safe installation,
operation and maintenance of your SPX Flow Technology equipment.
Read and understand the entire manual before removing from the crate and
installing the equipment.
SPX Flow Technology is committed to providing quality equipment and
customer satisfaction. We have a unique network of sales and service
support throughout the world, which are listed in this manual. Please note the
office located nearest to you. Should you have any questions concerning any
information contained in this manual, contact SPX Flow Technology in
Delavan, WI at 1-800-252-5200 for assistance.
Standard Warranty
Obligations of Seller
During the warranty period, the Seller shall repair, or at Seller's option,
replace parts determined by the seller to be defective in material or
workmanship. The warranty period is one (1) year from the date of delivery to
Buyer F.O.B. point of manufacture. The foregoing shall be the sole obligation
of the seller under this warranty with respect to the equipment and the other
property included in this agreement. With respect to the equipment, materials,
parts and accessories manufactured by others, seller's sole obligation shall
be to use reasonable efforts to obtain for the Buyer the full benefit of the
manufacturer's warranties
Warranty Exclusions
Repair or replacement of parts required because of misuse, improper care or
storage, negligence, alterations, accident, use of incompatible supplies or
lack of specified maintenance are excluded from the Seller's warranty
obligations.
Disclaimer of Warranties
The foregoing warranty expressions are in lieu of all other warranties,
expressed or implied, including implied warranties of merchantability and
fitness for a particular purpose, and existence of any such other warranty is
hereby denied.
Limitation of Liability and Remedies
The liability of the Seller for breach of any warranty obligation hereunder is
limited to:
1. The repair or replacement of the equipment on which the
liability is based or,
2. At the Seller's option, the refund to the Buyer of the amount paid by
the Buyer to the Seller for said equipment.
Introduction

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453343 ISS S 07.2010
All other liability of the Seller with respect to this agreement, or from the
manufacture, installation, maintenance, repair or use of any equipment
covered by or furnished under this agreement, whether in contract or in tort,
or otherwise, is limited to the amount paid by the Buyer to the Seller pursuant
to the terms herein:
Seller shall not be liable for incidental or consequential damages of any kind
whatsoever. The remedies set forth herein are exclusive.
Breach
Any breach by the Seller with respect to any items or unit of equipment shall
be deemed a breach with respect to that item or unit only.
Infringement
The Seller will not be liable for the infringement of any patent by the Buyer's
use of any equipment or materials delivered hereunder.
A word about SPX Flow Technology Service Parts
We want to raise your awareness to the problem associated with the
purchase of parts not manufactured to the high quality specifications of SPX
Flow Technology.
In addition to our high quality, SPX Flow Technology parts are manufactured
to meet regulatory agency authorization, approvals and certification (3A
Sanitary standards, USDA, ASME, BISSC, and OSHA). Where applicable,
materials used in construction of SPX Flow Technology parts conform to FDA
regulations.
Types of equipment include, but are not limited to, rotary pumps, centrifugal
pumps, homogenizers, ice cream freezers, scrape surface heat exchangers,
plate heat exchangers, ingredient feeders, process tanks and contact plate
freezers.
We bring this potentially serious problem to your attention in order to
safeguard your best interest and those of your employees.
If you have any questions, please feel free to call your local SPX Flow
Technology contact.
Introduction

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453343 ISS S 07.2010
Parts not manufactured to our specifications may cause damage to your SPX
Flow Technology equipment and void all warranties. Use of parts that do not
meet SPX Flow Technology specifications may cause property damages and
serious bodily injury
Policy regarding availability of service parts
SPX Flow Technology will attempt to remain in a position to supply
replaceable parts during the normal life of any item of SPX Flow Technology
equipment. This is contingent upon availability of tools, material and facilities
of our own as well as of our suppliers.
After the expiration of this period, the supply of service parts will be limited to
available stock of completed parts. If unable to supply the service part,
drawings will be furnished when available to permit local manufacturing, if
desired.
SPX Flow Technology reserves the right to improve, change or modify the
construction of its equipment or any parts thereof without incurring any
obligation to provide like changes to equipment previously sold.
Safety Information
Electrical Hazard
A pump is normally powered by an electric motor. This creates a hazard of
electrical shock which could cause severe injury or even loss of life.
To minimize the risk of this hazard:
All electric/electronic installation, maintenance, and service must be
performed by trained and authorized electricians only.
All electric/electronic installation must comply with all applicable codes and
standards including those established by OSHA (Occupational Safety and
Health Administration).
Do Not perform any maintenance or service on the motor or any other
electrical devices unless the electric power source has been turned off and
Locked Out using a locking device for which only the person involved in
the maintenance procedure has possession of the key.
Make installation suitable for a wet environment, including:
1. A power disconnect which can be locked in a power Off position and
the key removed. This will allow maintenance or service to be
performed without possibility of power being accidentally turned on.
2. Protection of all electric connections within a sealed junction box.
3. Proper grounding of the motor.
4. Protection from flooding. Do not install in an area which could fill with
water to a level which contacts the motor.
Warnings

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453343 ISS S 07.2010
Rotating Parts Hazard
Routine cleaning and maintenance procedures require pump disassembly.
The pump contains close fitting parts which rotate during operation. Should
the pump start unexpectedly while disassembled, severe injury could result.
To minimize the risk of this hazard:
1. Do Not assemble or disassemble the pump
2. Do Not remove the guard from the adapter
3. Do Not perform any maintenance or service on the motor or pump
unless the power source has been turned off and Locked Out, where
only the person involved in the maintenance procedure has
possession of the key.
High Temperature Hazard
Some pump applications may require processing of high temperature liquids
and/or the use of high temperature cleaning/sanitizing solutions. Pumping
high temperature liquids is considered to be hazardous and extreme care
should be taken when handling such liquids.
To minimize the risk of this hazard:
1. All installation, maintenance, and service of piping, valves, and other
controls must be performed by trained and authorized plumbers only.
This applies to process piping and cleaning/sanitizing piping.
2. All plumbing installation must comply with all applicable codes and
standards including those established by OSHA.
3. Do Not perform any maintenance or service on the motor or pump
unless the power source has been turned off and Locked Out, where
only the person involved in the maintenance procedure has
possession of the key..
4. Never disconnect any lines or fittings (whether process or
cleaning/sanitizing) or disassemble the pump until the line is no
longer under pressure and the fluid inside is not hot or harmful.
5. Operating personnel must be authorized and trained.
Warnings

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453343 ISS S 07.2010
High Pressure Hazard
Fluids processed by a pump are under pressure. This creates a hazard to
personnel working in the area should a leak occur. Leaking high pressure
fluid may cause injury by startling personnel or from actual contact with the
leaking fluid.
To minimize the risk of this hazard:
1. All installation, maintenance, and service of piping, valves and other
controls must be performed by trained and authorized plumbers only.
This applies to process piping and cleaning/sanitizing piping.
2. All plumbing installation must comply with all applicable codes and
standards including those established by OSHA.
3. Never disconnect any lines or fittings (whether process or
cleaning/sanitizing) or disassemble the pump when lines are under
pressure.
4. Should a leak occur, immediately find the cause and stop the leak.
Never operate the pump with both the inlet valve and the outlet valve in
closed positions. If the pump runs with liquid in it, while the valves controlling
the suction and discharge lines are both closed, the liquid in the pump will
heat up and turn into vapor, causing a risk of explosion.
To eliminate the risk of explosion, it is strongly recommended that the
following be included in the system:
1. A pressure relief device which relieves pressure and contains any
discharge, or
2. A thermal/pressure overload device to isolate the pump motor in the event
of excessive temperature/pressure.
Leaking Fluid Hazard
Fluid leaks or spills may occur in any pumping system. This creates a hazard
to personnel due to slippery floor conditions or contact with possibly
hazardous fluids.
To minimize the risk of this hazard:
1. Always clean up leaks and spills immediately.
2. Find and correct the cause of the leak immediately.
Warnings

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453343 ISS S 07.2010
The following important cautions describe ways to avoid incorrect operating
procedures which will cause serious damage to the pump.
Cavitation
Cavitation is a condition within the pump which results in extreme hydraulic
forces which can create a risk of severe damage to pump components.
Cavitation makes a characteristic "rattling" noise. It is caused by operation
with low fluid pressure at the pump inlet.
To minimize this risk:
Install and operate the pump so that NPSH (net positive suction head)
available to the pump equals or exceeds the "NPSH required" as shown on
the pump performance curve. To increase NPSH available:
1. Decrease the temperature of the liquid being pumped.
2. Increase the height of liquid supply level.
3. Decrease the suction line length and remove restrictions to flow such
as elbows, valves, etc.
4. Increase the suction line size (diameter).
5. Reduce the pump flow rate (throttle discharge).
Corrosion Pitting
Stainless steel is subject to a risk of corrosion when improperly cleaned or
sanitized.
To minimize this risk:
1. Never use steel wool or a wire brush to clean stainless steel surfaces.
Iron particles will embed and cause corrosion pits. Use a non-metallic
brush or scrub pad for cleaning when required.
2. Never allow prolonged contact of sanitizing solutions or other
corrosive cleaning chemicals with stainless steel. Only use sanitizing
solutions immediately prior to processing.
Important Warnings

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453343 ISS S 07.2010
Motor Overload
Depending on the impeller diameter and motor horsepower, there is a risk the
pump motor will overload if operated with a fully opened, unrestricted
discharge.
To minimize this risk:
1. Before operating the pump, review performance curve and application
giving consideration to motor horsepower and impeller diameter
versus expected discharge flow rate and pressure. If the pump is
operated with less than expected discharge pressure, the flow rate will
increase and the load on the motor will increase.
2. Install a throttling type valve in the discharge piping to allow control of
pump discharge flow rate during initial operation. The valve may be
removed later when the system is proven to supply adequate
discharge pressure to prevent overload.
Impeller Shaft Location
The location of the impeller shaft on the motor shaft is critical for correct
pump operation and to obtain maximum operating efficiency.
APV Centrifugal Pumps are designed to achieve excellent operating
efficiency. This efficiency is possible, in part, because of precision
manufacturing of the pump components. The impeller must be precisely
located between the casing and backplate to take full advantage of the
pump's operating efficiency.
Incorrect location of the impeller shaft may cause the impeller to contact the
casing or the backplate during operation and cause extensive damage to the
pump.
The procedures for correctly locating the impeller shaft are described in the
Maintenance section. This should be referred to whenever:
1. A new pump is installed onto a motor or pedestal.
2. The impeller shaft is loosened or removed from the motor or pedestal
shaft.
3. A replacement casing or backplate is installed.
Important Warnings

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453344 ISS S 07.2010
Sectional Drawing W+
Section 1
Shaft size ø25 and ø35
Section 2
Shaft size ø25 and ø35

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453344 ISS S 07.2010
Sectional Drawing W+
1a: Pump housing
2a: Cap nut
3: O-ring
4: Impeller
6: O-ring
7a: Back plate
8: Locating pin
9a: Clamp ring
10: O-ring
11: Shaft
14: Extension frame
Section 1 Single seal for shaft size ø25 and ø35
Section 2 Double seal with liquid/steam flushing for shaft size ø25 and ø35
5.1: Seal housing
5.3: Pressure ring
5.4: Drain pipe
5.5: O-rings
5.6: Stationary seal face
5.7: Rotary seal face
5.8: Pin
5.9: Seal housing
5.10: O-ring
5.11: Pressure ring

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453345 ISS S 07.2010
1. Introduction to the W+ program
1.1 The W+ range
This manual covers all the standard versions of the W+ pump as well as
aseptic versions (Wa+ pumps) and pumps with inducer (Wi+ pumps).
Check the pump's nameplate to make sure that you have one of the
above versions. The WHP+ and W+140/50 pump versions are described
in a special manual which will come with the pump. The WK+ (pedestal
pump version) is described in a supplementary manual.
Units are designed and constructed to meet the requirements of the
3A sanitary standards for cleanability of processing equipment.
1.2 The W+ pump features
Standard Options are available in the W+ range:
- with frame and feet
- with shaft seal in carbon/SiC or SiC/SiC
- with O-rings in EPDM or FPM (Viton) (Kalrez and possibly others)
- with single or double shaft seal prepared for water-flushed or
steam-flushed shaft seal
Additional Options:
- Heating/Cooling Jacket
- Casing Drain
- Portable 2- and 3-wheel Cart
- Inducer (Wi+)
- Double O-ring sealing of pump body fitted for sterile flushing (Wa+)
- Heavy duty clamping ring, increasing the pump’s maximum
permissible outlet pressure to 360 PSIG
(available for W+30/120, W+55/35,
W+55/60, W+60/110, W+70/40) or 290 PSIG
(available for W+80/80).
- W+ pumps can be supplied with all standard welded ferrules
(tri-clamp, bevel seat, ISO, etc.) or with special aseptic connections
prepared for sterile flushing (Wa+).
1.3 Identifying the pump model
A nameplate as shown in Fig. 1 is fitted on the extension frame.
Example:
Serial No.: Use the serial number whenever requesting information on
service parts.
Type: The type indicates the type of pump, such as W+10/8,
W+22/20, etc.
Year: Indicates the year of manufacture.
Order No.: Indicates the number the pump was ordered under.
Fig. 1: Nameplate

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453345 ISS S 07.2010
2. Installation of the Pump
2.1 Positioning
The pump must be positioned so that the suction pipe is as short as
possible and there is a sloping gradient towards the suction port.
Keep the number of valves, bends and tee-pieces on the suction side to
an absolute minimum.
There must be sufficient space around the pump for piping and access
for maintenance.
2.2 Lining up the pipe system
Line up the pipes carefully to the pump suction and discharge nozzles.
Make sure that the pipe system is adequately supported by pipe
supports, so that the pump body is not subject to strains and weight from
the pipe system.
2.3 Power supply
All electrical installation must comply with all applicable codes and
standards including those established by the Occupational Safety and
Health Administration (OSHA).
Install a main power disconnect on-off switch that can be locked in the
power off position and have the key removed when service is performed.
Thoroughly read the motor manufacturer’s instructions before making
installation.
The motor should be connected such that the direction of rotation of the
motor (and thus the impeller) is counterclockwise when viewed from the
front towards the suction nozzle of the pump body (fig. 2).
2.4 Water supply for water-flushed shaft seal
Pumps with a water-flushed shaft seal have two hose connectors on the
seal flange. The hose connectors are 1/8 inch NPT and fit a 1/4 inch
plastic tubing. A flush flow of 4-8 gallons/hour is required. Maximum
pressure is 100 PSIG.
The hose connection in the seal flange should always be positioned
vertically with the fluid inlet below and the outlet above. See Fig. 3.
Water consumption can be limited by installing a solenoid valve on the
supply side for the flushing water. The open/close function of the
solenoid valve can be controlled by the pump’s start/stop sequence.
Do not use the flushing water connectors for steam condensate. If you
want to use steam as the barrier medium, special aseptic piping is
required. See section 2.5 for connection.
Fig. 3
Fig. 2: Direction of shaft rotation

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453345 ISS S 07.2010
2. Installation of the Pump
2.5 Connecting steam or steam condensate for aseptic use
Shaft seals for aseptic use are supplied with stainless steel connectors
(18” NPT x 1/4” Tube).
The connection for steam or steam condensate with a static double seal
in the pump body is supplied with stainless steel fittings (1/8” NPT x 1/4”
Tube) and 1/4” stainless steel tubing.
Steam can be used at temperatures up to 300°F (150°C) and pressures
up to 72 PSIG (5 bar).
Before starting the pump, dismantle and clean the suction pipe. Any
foreign material in the pump should be removed.
3.1 Checking the pump body for foreign material
Remove the pump body as described below. The assembly drawing is to
be used for reference (page 8).
1. Disconnect the power supply.
2. Remove the pump body (item 1a) by undoing the clamp ring
(item 9a) or body screws and carefully pull off the pump body.
3. Turn the impeller (item 4) to ensure that there is no foreign material
behind it.
4. If there is any foreign material in the pump, remove it.
5. When the pump body is clean and free of foreign material,
reassemble the pump.
Mount the pump body as described below:
6. Check that the locating pin (item 8), where fitted, in the top of the
back plate mates with the detent in the pump body and carefully, to
avoid damaging the O-ring, press the pump body (item 1a) in over
the o-ring (item 6) and fasten with the clamp ring (item 9a) or body
screws, observing the correct tightening torque.
M8: 22 ft-lb (30 Nm)
M10: 41 ft-lb (55 Nm)
M12: 80 ft-lb (59 Nm)
7. Install suction and discharge pipes. Check that the pipe unions
have been tightened properly and that pipe supports have been
fitted.
To make the pump body easier to fit, we recommend that you give the
O-ring a thin layer of food-approved, acid-free grease or soap.
3.2 Testing the pump
To check that the pump is working satisfactorily, pour water into the
pump and start it for a moment. Check the direction of rotation (fig. 2).
Listen for any unusual noises.
In pumps with water-flushed or steam-flushed shaft seals, the seal
chamber must be filled with water/steam.
Never allow the pump to run without liquid, as this will ruin the shaft seal.
3. Before Start-up
Fig. 2: Direction of rotation

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453345 ISS S 07.2010
Check the following before starting the pump:
- that the shaft guard has been fitted properly
- that there is free access for liquid
- that the valve on the discharge side is closed
The valve on the discharge side (if fitted) is closed during start-up to
reduce motor starting current, but should be opened again as soon as
the pump has been started.
4.1 Flushing water/steam/condensate etc.
In pumps with a flushed shaft seal, check that the supply of flushing
medium is open and that the flow of the medium is adequate
(approx. 4-8 gallons/hour).
5.1 Checking the shaft seal
Check the pump’s shaft seal for leaks on a regular basis. If the shaft
seal is leaking, replace it or its relevant parts as described below.
5.2 Replacing the shaft seal
The assembly drawing shows the position and construction of the shaft
seal - both ordinary seals and seals with water/steam flushing.
To replace the shaft seal, it is necessary to dismantle the pump as
described below. The assembly drawing on page 8 is to be used for
reference.
1. Disconnect the power supply in the motor isolator by removing the
fuses and disconnecting the cables.
2. Turn off the steam and flushing water supply.
3. Close the inlet and discharge of the pump, and make sure that
there is no liquid in the pump body.
If the pump is used for hot and/or aggressive liquids, special
precautions must be taken. In such cases, observe the local
regulations for personal protection when working with these
products.
4. Once the inlet and outlet pipes have been closed properly, release
the clamp ring (item 9a) or body screws, take off the pump body
(item 1a) and remove the impeller (item 4).
5. Remove the stationary seal face (item 5.6) mounted in the back
plate (item 7a) with your fingers.
6. Remove the O-ring (item 5.5) from the stationary seal face.
7. Use your fingers to remove the rotary seal face (item 5.7) mounted
in the impeller (item 4).
4. Putting the Pump into Service
5. Maintenance
Dismantling the pump
Dismantling the shaft seal

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453345 ISS S 07.2010
5. Maintenance
8. Remove the O-ring (item 5.5) from the rotary seal face.
9. Clean the stator and rotary seal face locations, if necessary with air
or water.
9a. In the case of water-flushed/aseptic shaft seals, the back plate
must be removed to dismantle the rear shaft seal. The rear seal
stationary seal face (item 5.6) is mounted in the pressure ring
(item 5.11) and the rotary seal face (item 5.7) is mounted on the
shaft (item 11). These are removed in the same way as the front
seal components.
10. Check O-rings (item 5.5) for signs of cracks, lack of elasticity,
brittleness and/or chemical attack. Replace worn or defective parts.
11. Check the stationary seal face (item 5.6) and rotary seal face (item
5.7) for signs of wear too. The wearing surfaces must be
completely free of scratches/cracks. If not, the rotary seal face and
stationary seal face must both be replaced.
11a. In the case of water-flushed shaft seals, check the rear seal rings
(item 5.7, 5.6) for wear too, and replace if necessary.
12. Fit new O-rings on the stationary seal face and rotary seal face.
Note. Remember to moisten these with water.
13. Fit the rotary seal face (item 5.7) on the impeller without using
tools.
Note. The "notch" in the rotary seal face must be located so that it
mates with the driving pin (item 5.8) in the impeller hub.
13a. In the case of water-flushed/aseptic seals, also fit a rotary seal face
(item 5.7) with its O-ring (item 5.5) in the location on the shaft,
again without using tools.
14. Fit drain pipe (item 5.4) to the back of the stationary seal face (item
5.6). Fit the stationary seal face (item 5.6) on the back plate without
using tools.
Note. The "notches" in the stationary seal face must mate with the
driving dogs on the carrier in the back plate. Check that the
stationary seal face is positioned so that it slides backwards and
forwards easily in the back plate.
14a. Where there are water-flushed/aseptic seals, fit the stationary seal
faces (item 5.6) into the seal cover (item 5.9) and back plate (item
7a).
15. After fitting, clean the wearing surfaces.
15a. For liquid-flushed/aseptic seals, remount the back plate (item 7a).
Fitting
Positioning the water supply
connections
Checking parts
for wear

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453345 ISS S 07.2010
16. Fit the impeller (item 4). Remember to use the proper tightening
torque:
M10: 33 ft-lb (45 Nm)
M14: 52 ft-lb (70 Nm)
M20: 148 ft-lb (200 Nm)
17. Check that the locating pin (item 8), where fitted, in the top of the
back plate mates with the detent in the pump body and carefully, to
avoid damaging the O-ring, press the pump body (item 1a) in over
the O-ring (item 6) and fasten with the clamp ring (item 9a) or body
screws, observing the correct tightening torque.
M8: 22 ft-lb (30 Nm)
M10: 41 ft-lb (55 Nm)
M12: 80 ft-lb (59 Nm)
5.3 Replacement of motor
The standard motor for the W+ pump has a locked front bearing. If the
motor is replaced, the new motor must also have a locked front bearing.
The motor bearing is enclosed and permanently lubricated.
Follow the instructions below when replacing the motor. For replacement
of bearings, see the motor supplier's service instructions.
1. Lock Out power supply then disconnect the pump and motor
from system.
2. Removal of the pump body. See para 5.2, points 1-4.
3. Remove the impeller.
4. If possible, stand the pump on end. See Fig. 4.
5. Undo the four motor flange bolts between the motor and extension
frame and remove them. See Fig. 4.
6. Lift the back plate, extension frame and spacer flange (where
fitted), which are still bolted together, up and off the shaft. See Fig.
4.
7. See Fig. 5. Loosen the screws in the shaft muff, pull the shaft off
and replace the motor.
8. See figure 6. Before remounting the pump shaft, remove any dirt
and grease from the motor shaft and the muff’s internal clamping
surfaces. Mount the pump shaft loosely. Position the balance hole
above the keyway.
9. Fit the back plate and extension frame over the shaft.
10. Tighten the bolts.
11. Turn the pump back so it stands on its legs.
12. Fit the impeller and secure it with the cap nut/inducer.
Remember to use the proper tightening torque:
M10: 33 ft-lb (45 Nm)
M14: 52 ft-lb (70 Nm)
M20: 148 ft-lb (200 Nm)
5. Maintenance
Back plate
Screw
Extension frame
Motor
Fig. 4: Unscrew motor flange bolts
Fig. 5: Loosen screws
Shaft
Screw
Motor
Keyway
Motor shaft
Balance hole
Pump shaft
Fig. 6: Mount pump shaft

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453345 ISS S 07.2010
5. Maintenance
13. Place the plastic star against the impeller (fig. 7).
14. Fit the pump body (item 1a) with the clamp ring (item 9a).
15. Push the shaft (item 11) forward until the impeller (pos 4) is
touching the plastic star (fig. 8).
16. Tighten the shaft screws. Remember to use the proper tightening
torque:
M8: 22 ft-lb (30 Nm)
M10: 41 ft-lb (55 Nm)
17. Remove the star by pulling it out through the inlet.
5.4 Recommended inventory of spare parts
Seal set
We recommend that you keep both seal kits and service kits for the W+
pumps in stock. The seal kit for the W+ pump consists of the wearing
parts of the pump, as specified on page 32 - 33.
Service kit
The service kit is made up of a number of the main components of the
pump which are not wearing parts, but which you still may have to
replace: shaft, impeller, cap nut and fixing kit.
The table below shows the recommended inventory of spare parts for
normal operation and in cases where there are special needs - for
example 24-hour operation, operation with abrasive media or
processes that are sensitive to even the shortest production stoppage.
Wearing parts (seal kit, see page 32 - 33)
Service parts (shaft, impeller, cap nut page 27, fixing kit page 30-31)
Normal operation
Special needs
0-5 5-20 > 20
No. of pumps in service
2 3 1
3 6 2
Sets Sets Sets/ 10 pumps
Normal operation
Special needs
0-5 5-20 > 20
No. of pumps in service
0 1 1
1 2 1
Sets Sets Sets/ 10 pumps
Fig. 8: Push shaft forward
Impeller
Plastic star
Pump body
Fig. 7: Place plastic star against impeller