SSP Pumps S Series User manual

M/101/0606/EN8
Series S
Stainless Steel Positive Displacement Rotary Lobe Pumps
Operating Manual

EC Declaration of Incorporation
The designating company
Alfa Laval Eastbourne, Alfa Laval Limited_______
Company Name
Birch Road, Eastbourne, East Sussex BN23 6 PQ
Address
Phone: [phone] Fax: [phone]____
Phone and Fax No.
We hereby declare that the following machinery conforms to the machinery directive 98/37/EC and to the following other
relevant directives. The machinery has been designed and manufactured in accordance with the transposed harmonised
European standards; European and national standards as listed:
We also hereby declare that the following machinery conforms to Regulation (EC) No 1935/2004 relating to materials
and articles intended to come into contact with food.
Machine Description: Rotary Lobe Pump
______________________________________________________________________
Type/Size: ________________________ Serial Number: ___________________________
Date of Manufacture: ______________________________________________________________________
This machinery has been designed and manufactured in accordance with the following transposed harmonised European
Standards:
EN809: 1998 Pumps and pump unit for liquids - common safety requirements
_____________________________________________________________________________________
ISO9001: 2000 Quality Management System
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
A technical construction file for this machinery is retained at the above address.
Signed: _____________________________________ Date: __________________________________
(Authorised Person)
P.Sweet _______________ Quality/H&S Manager________________

EC Declaration of Conformity
The designating company
Alfa Laval Eastbourne, Alfa Laval Limited_______
Company Name
Birch Road, Eastbourne, East Sussex BN23 6 PQ
Address
Phone: [phone] Fax: [phone]____
Phone and Fax No.
We hereby declare that the following machinery conforms to the machinery directive 98/37/EC and to the following other
relevant directives. The machinery has been designed and manufactured in accordance with the transposed harmonised
European standards; European and national standards as listed:
We also hereby declare that the following machinery conforms to Regulation (EC) No 1935/2004 relating to materials
and articles intended to come into contact with food.
Machine Description: Rotary Lobe Pump - Motorised
______________________________________________________________________
Type/Size: ________________________ Serial Number: ___________________________
Date of Manufacture: ______________________________________________________________________
Other Applicable Directives: Electrical Equipment Low Voltage 73/23/EEC
______________________________________________________________________
Electromagnetic Compatibility 89/336/EEC
______________________________________________________________________
This machinery has been designed and manufactured in accordance with the following transposed harmonised European
Standards:
EN809: 1998 Pumps and pump unit for liquids - common safety requirements
_____________________________________________________________________________________
ISO9001: 2000 Quality Management System
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
A technical construction file for this machinery is retained at the above address.
Signed: _____________________________________ Date: __________________________________
(Authorised Person)
P.Sweet _______________ Quality/H&S Manager________________

6

The information contained herein is correct at the time of issue but may be subject to change without prior notice.
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Table of contents
1. General description ............................................................................... 8
2. Safety ..................................................................................................... 9
2.1 Important information ........................................................................ 9
2.2 Warning signs ................................................................................... 9
2.3 Safety precautions .......................................................................... 10
3. Installation ........................................................................................... 11
3.1 Unpacking, Handling and Storage ................................................... 11
3.2 System design and installation ........................................................ 12
3.3 Flushing seal arrangement and pre-start up checks ........................ 16
4. Maintenance ........................................................................................ 17
4.1 Cleaning in place (CIP) .................................................................... 17
4.2 Maintenance schedule .................................................................... 18
4.3 Disassembly ................................................................................... 19
4.4 Assembly ........................................................................................ 22
4.5 Primary seals removal and fitting ..................................................... 28
4.6 Pressure relief valve ......................................................................... 34
4.7 Heating/Cooling Devices ................................................................. 36
4.8 Troubleshooting .............................................................................. 37
5. Technical data ...................................................................................... 38
5.1 Technical data ................................................................................. 38
5.2 Pumphead Clearance Information ................................................... 40
6. Parts list ............................................................................................... 44
6.1 S1-3 Pump Range .......................................................................... 45
6.2 S4 Pump Range ............................................................................. 46
6.3 S5 Pump Range - Horizontally Ported ............................................. 48
6.4 S5 Pump Range - Vertically Ported ................................................. 50
6.5 S6 Pump Range - Horizontally Ported ............................................. 52
6.6 S6 Pump Range - Vertically Ported ................................................. 54

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1.1 General description 1. General description
The Series S pump supplied is a positive displacement rotary
lobe pump; it may be supplied with or without a drive unit
(see drawing). The drawing shown indicates various parts of
the pump unit.
The Series S range has a universal gearbox design in series
S1 - 4. This enables the flexibility of mounting pumps with the
inlet and outlet ports in either a vertical or horizontal plane.
The port orientation, vertical or horizontal, may be changed by
moving one of two available bolt-on feet on the gearbox. Port
orientation should be specified when ordering, but the
alternative foot design allows pumps that are already installed
being changed should the need arise.
Series S5 & 6 pumps can also have the inlet and outlet ports
in either horizontal or vertical plane. This is achieved by the
use of dedicated gearbox castings having either horizontal or
vertical shaft arrangements.
Baseplate fixing holes
Coupling guard
(encloses coupling)
Rotorcase
Rotorcase
cover
Ports
Product
seal area
Gearbox
Drive unit
Noise levels
Under certain operating conditions pumps and/or drives and/or the systems within which they are installed can produce sound
pressure levels in excess of 85dB[A]. When necessary, protection against noise should be taken.
Drawing shows only mounted unit
Pump duty conditions
The pump should only be used for the duty for which it has been specified. The operating pressure, speed and temperature
limits have been selected at the time of order and MUST NOT be exceeded. These details are stated on the original order
documentation and if not available may be obtained from your supplier quoting pump model and serial number.
External Cleaning
Use cleaning fluids below PH 8. Cleaning fluids above PH 8 may cause some paint discolouration.

9
2. Safety 2.1 Important information
2.2 Warning signs
Always read the manual before using the pump!
WARNING!
Indicates that special procedures must be followed to avoid severe personal injury.
CAUTION!
Indicates that special procedures must be followed to avoid damage to the pump.
NOTE!
Indicates important information to simplify or clarify practices.
General warning:
Dangerous electrical voltage:
Caustic agents:
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
Not applicable for Atex applications

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2.3 Safety precautions 2. Safety
Pay special attention to the instructions below so that severe personal injury or damage to the pump are avoided.
Installation
- Always observe the technical data (see chapter 5).
- Never start in the wrong direction of rotation with liquid in the pump.
- Never put your hands or fingers inside the port connections or anywhere close to rotating
shafts.
The pump must be electrically connected by authorised personnel (see the motor instructions
supplied with the drive unit).
Operation
- Always observe the technical data (see chapter 5).
- Never touch the pump or the pipelines when pumping hot liquids or when sterilising.
- Never stand on the pump or pipelines.
- Never run the pump with either the suction side or the pressure side blocked.
- Never put your hands or fingers inside the port connections or anywhere close to rotating
shafts.
- Never run the pump unless fully assembled, i.e. pump head must not be removed from
gearcase.
Only handle toxic and acidic liquids in accordance with the manufacturers instructions and
recommendations.
Maintenance
- Always observe the technical data (see chapter 5).
- The pump must never be serviced when hot.
- The pump and the pipelines must never be pressurised when the pump is being serviced.
- Never put your hands or fingers inside the port connections or anywhere close to rotating
shafts.
Always disconnect the power supply when the pump is being serviced.

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3. Installation 3.1 Unpacking, Handling and Storage
Step 1
Refer to the pump weights guide (chapter 5) before selecting and using any lifting gear. The drawings show how the pump
should be lifted.
Ensure that lifting equipment is correctly rated and used within these limits.
Bareshaft pump
Pump with drive unit
Step 2
On receipt always:
- Check the delivery note against the goods received.
- If motorised, check that the drive instructions are available.
- Be careful not to discard any manuals that may be enclosed with the packaging.
- Inspect the packing for signs of damage in transit.
- Carefully remove the packing away from the pump.
- Inspect the pump for any visible signs of damage.
- Clean away the packing from the pump port connections.
- Report any damage immediately to the carrier.
Step 3
After receipt and inspection, if the pump is not to be installed immediately, the pump should be repacked and placed in suitable
storage. The following points should be noted:
- Plastic or gasket type port covers should be left in place.
- Pumps received wrapped with corrosion inhibiting treatment material should have wrapping replaced.
- A clean, dry storage location free from vibration should be selected. If a moist or dusty atmosphere is used for storage,
further protect the pump or unit with a suitable cover.
- Rotate the pump/pump unit by hand weekly, to prevent bearing damage.
- All associated ancillary equipment should be treated similarly.

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3.2 System design and installation 3. Installation
Design:
- Confirm the Net Positive Suction Head (NPSH) available from
the system exceeds the NPSH required by the pump, as this
is crucial for ensuring the smooth operation of the pump and
preventing cavitation.
- Avoid suction lifts and manifold/common suction lines for
two pumps running in parallel, as this may cause vibration
or cavitation.
- Protect the pump against blockage from hard solid
objects e.g. nuts, bolts welding slag etc. Also protect the
pump from accidental operation against a closed valve by
using relief valves, pressure switches or current limiting
devices.
- Fit suction and discharge monitor points for diagnostic
purposes.
- Fit valves, if two pumps are to be used on manifold/common
discharge lines.
- Make the necessary piping arrangements if flushing is
required for the seal or if a media is required for heating/
cooling jackets and saddles.
- Allow at least 1 m for pump access/maintenance all around
the pump.
- Do not subject rotary lobe pumps to rapid temperature
changes, as pump seizure can result from thermal shock.
Discharge line
Plan view
Suction line
Pipework:
All pipework must be supported. The pump must not be allowed to support any of the pipework weight beyond the limits set
as shown in the following table.
Remember:
Pipework supports must also support the weight of the product being pumped.
- Design short straight suction lines to reduce friction losses in the pipework thereby improving the NPSH available from
the system.
- Avoid bends, tees and any restrictions close to either suction or discharge side of pump. Use long radius bends
wherever possible.
- Provide isolating valves on each side of the pump when necessary.
- Keep pipework horizontal where applicable to reduce air locks. Include eccentric reducers on suction lines.
Plane ‘X’
Plane ‘Z’
Plane ‘Y’
Manifold suction/Common Line
To ensure optimum operation it is important that any pump unit is installed correctly. When designing a pumping system the
following should be taken into consideration.

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Pump Forces Moments
Model Units FZ FY FX EF Units MZ MY MX EM
S1 N 80 60 70 120 Nm 75 90 115 165
lbf 18 13 16 27 lbft 55 66 85 122
S2 N 125 100 110 195 Nm 90 105 130 190
lbf 28 22 25 44 lbft 66 77 96 140
S3/4 N 165 135 150 260 Nm 100 115 140 205
lbf 37 30 34 58 lbft 74 85 103 151
S5/6 N 300 250 250 460 Nm 125 145 175 260
lbf 67 56 56 103 lbft 92 107 129 192
3. Installation 3.2 System design and installation
Table of Maximum Forces and Moments
Direction of flow:
The direction of flow is dictated by the direction of rotation of the drive shaft. Reversing the direction of rotation will reverse the
flow direction.
Suction Discharge
SuctionDischarge
Discharge
Suction
Discharge
Suction

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3.2 System design and installation 3. Installation
Pump Lubrication:
The pump will not be supplied pre-filled with oil therefore this table must be used to select recommended oil.
Oil changing: Oil level must be checked with the pump static.
First change: After 150 hours of operation, thereafter every 3000 hours of operation.
Oil filling: Fill with oil through the filler plug to the level indicated in the sight glass.
NOTE!
On horizontally ported pumps the sight glass must be fitted to the upper hole on the side of the gearcase.
Refer to technical data (chapter 5) for oil approximate quantities required.
Recommended Oils
Pump Operating Temperature Food grade oils (USDA H1)
-20°C to +130°C +130oC to 200°C -20°C to +130°C
(-4°F to +266°F ) (+266°F to 392°F) (-4°F to +266°F)
BP Energol GR - XP150 BP Enersyn SG150 Bel-Ray No-Tox gear oil ISO grade 150, product # 6243.
Castrol Alpha SP150 Castrol Alphasyn PG150 Mobil DTE FM 150
Mobil Gear 629 Mobil Glygoyle 30 Optimol Optileb GT 150
Shell Omala 150 Shell Tivela S150 Castrol Vitalube GS 150.food grade
Texaco Meropa 150 Texaco Synlube CLP220
Esso Spartan EP150 Mobil Glygoyle 22
For ATEX applications refer to ATEX addendum manual.
Baseplate Foundations
Pumps when supplied with a drive unit are normally mounted on a baseplate. Our standard baseplates have pre-drilled
fixing holes to accept base retaining bolts. To provide a permanent rigid support for securing the pump unit, a foundation is
required which will also absorb vibration, strain or shock on the pumping unit. Methods of anchoring the baseplate to the
foundation are varied, they can be studs embedded in the concrete either at the pouring stage as shown below, or by use of
epoxy type grouts. Alternatively mechanical fixings can be used.
The foundation should be appox. 150 mm longer and wider than the baseplate. The depth of the foundation should be pro-
portional to the size of the complete pump unit. For example, a large pump unit foundation depth should be at least 20 times
the diameter of the foundation bolts.
The drawing above shows two typical methods for foundation bolt retaining. The sleeve allows for “slight” lateral movement
of the bolts after the foundation is poured. Rag or waste paper can be used to prevent the concrete from entering the sleeve
while the foundation is poured. A minimum of 14 days us normally required to allow the curing of the concrete prior to pump
unit installation.
Waste put around bolt
before pouring concrete Foundation surface left
through to anchor ground
One D
Minimum
One-half D
Minimum
Sleeve
3D
Lug welded to
bolt head
10D
4D
D

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3. Installation
Coupling alignment:
Before the pump unit is installed it is important to ensure that the mounting surface is flat to avoid distortion of the baseplate,
which may cause pump/motor shaft misalignment and pump/motor unit damage.
Parrallel misalignment Angular misalignment
Once the baseplate has been secured, the pump shaft to motor shaft coupling alignment should be checked and adjusted as
necessary. This is achieved by checking the maximum angular and parallel allowable misalignments for the couplings as stated
by the coupling manufacturer.

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This page is not applicable for ATEX applications.
For ATEX application see ATEX addendum
3.3 Flushing seal arrangement and pre-start up checks 3. Installation
Step 4
Flushing fluid
The choice of flushing fluid is dependent upon the fluid being pumped and duty conditions i.e. pressure and temperature. Usu-
ally water is used for cooling or flushing water soluble products. For both single and flushed mechanical seal arrangements the
temperature of flush media should never allowed to exceed the maximum temperature of the pumped media. For advice on
selecting a suitable flushing fluid please contact pump supplier.
Step 5
Flushing pressure and flow rate
Single flushed mechanical seal 0.5 bar (7 psi) maximum. Any further increase in pressure will result in lip seal failure.
Double mechanical seal/flushed packed gland 1.0 bar (14 psi) higher pressure than the discharge of the pump. If the discharge
pressure fluctuates set the pressure to suit maximum condition.
The flushing flow rate must be adequate to ensure that the temperature limitation of the seals is not exceeded. Contact your
pump supplier for further information on the recommended flow.
Minimum flow rate required per shaft seal is 30 l/hr
Step 6
Pre-start up checks
- Check the pipework system has been purged to remove debris.
- Check all obstructions have been removed from pipework and pump.
- Check pump connections and pipework joints are tight.
- Check lubrication levels are correct.
- Check seal flushing is connected if applicable.
- Check all safety guards are in place.
- Check that inlet and outlet valves are open.
Step 3
Flushing arrangements in principle
Flush outlet
Flush inlet
Flush outlet
Flush intlet
Link
pipe
Parallel pipingSerial piping
Step 1
A flushed seal arrangement is fitted in order to cool or clean the seal area.
It is important that:
- The flush is correctly connected (see below).
- A compatible flushing fluid is used and supplied at the correct pressure and flow rate (see step 5).
- The flush is turned on at the same time/prior to starting the pump, and turned off at the same time/after stopping the
pump.
Step 2
Connecting the flush
The following equipment is strongly recommended when using a flushing system:
- Control valve and pressure gauge, to enable the correct flushing pressure to be obtained and monitored.
- Isolation valve and check valve, so that the flush can be turned off, and to stop any unwanted substances flowing in
the wrong direction.
- A method of visibly indicating flushing fluid flow.

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4. Maintenance 4.1 Cleaning in place (CIP)
The pump can be manually cleaned or cleaned in place (CIP). The following is an example of a typical CIP procedure. However
specific advice for each application should be sought from the pump supplier.
Typical CIP procedure
1. Flush through the system with cold water or bore water (6°) (43°F).
2. Run hot caustic soda (70-80°C) (158-176°F) at 2.5% dilution through the system for 20-30 minutes.
3. Final flush through with cold water again.
Warnings
- Never touch the pump or the pipelines as they can be extremely hot!
- Do not subject the pump to rapid temperature changes during CIP procedures, as pump
seizure can result from thermal shock. A suitable by-pass is recommended.
- Always rinse well with clean water after using a cleaning agent.
- Always use rubber gloves and protective goggles when handling caustic agents.
- Always store/discharge cleaning agents in accordance with current rules/directives.

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4.2 Maintenance schedule 4. Maintenance
It is advisable to install pressure gauges on both sides of the pump so that any problems within the pump/pipework can be
monitored.
Maintenance schedule
Your weekly schedule should include:
- Checking the oil level in the gearcase with the pump stationary.
- Checking the seals for leakage.
- Checking the oil seals for leakage.
- Check pumping pressures.
In certain operational circumstances the pump will pose a thermal hazard and as such should not be touched during operation.
After shutdown the pump unit should be allowed time to cool.
Oil should be changed every 3000 hours of operation or a period of 2 years, whichever is the soonest.
Part description Quantity
Lip seal drive end 1
O-ring rotorcase cover 1
Lip seal gland end 2
O-ring rotor sealing shaft end 2
O-ring rotor sealing nut end 2
Primary seals 2
Recommended Spare Parts
The table shows recommended spare parts that should be
retained within your maintenance schedule.

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4. Maintenance 4.3 Disassembly
Step 1
Before disassembling the pump refer to safety
precautions. See exploded view drawings (chapter 6).
Removing rotorcase cover
1. Remove rotorcase cover nuts (13) and cover (12).
Step 2
Removing rotors
1. Insert a plastic/wooden block between the two rotors (17)
to stop them turning.
2. Remove rotor retention nuts (22) and rotors. Pump models
S6 rotors are retained by torque locking assemblies, TLA’s
(19) and can be removed by:
- Remove the rotor cap to reveal the TLA.
- The screws now visible are unscrewed and the TLA is
removed.
Plastic or
wooden block
Step 3
Removing rotorcase
1. For packed gland seals loosen the gland followers to relieve
the packing pressure on the shaft.
For flushed mechanical seal arrangements, remove the seal
housing retaining nuts and ease the seal housings from the
rotorcase.
2. Remove rotorcase retaining nuts (4) and washers (4A).
3. Tap both sides of the rotorcase (9) with a soft mallet.
4. Take care not to damage mechanical seals. The
rotorcase must not be allowed to drop onto the shafts (24
and 25) during the removal process.
5. Shims (8) should not be removed unless rotor clearances
require resetting.
Step 4
Draining pump lubrication
1. Place a tray under the gearcase to collect the waste
lubricating oil.
2. Remove the lower drain plug (45) at the side of the gearcase
(1).

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Step 7
Removing timing gears
1. Release clamp plate screws (40) and remove clamp plate
(39) on pump series 1,2 and 3. For pump models S4, 5 and
6 remove the torque locking assembly screws in several
stages.
2. Remove gears (36) using the tapped extraction holes
provided, or remove shaft assembly as shown in step 8
below.
4.3 Disassembly 4. Maintenance
Step 5
Removing seal retainers
1. Remove screws (15).
2. Then remove seal retainers (14) - as a liquid sealant has
been used a lever may be required to remove retainers.
3. The lip seals (16) can be removed using a screwdriver/
lever once the seal retainers are removed. It is essential to
renew the lip seals and it is recommended that new
gaskets or sealant be used prior to reassembly.
Step 8
Shaft assembly removal
1. Using a soft mallet gently tap the rear end of each shaft (24
and 25), to remove through the front of the gearcase (1).
2. Support each shaft during removal from the gearcase.
3. Remove the shaft abutment spacer (27).
- For vertically ported pumps this is placed in the right hand
bearing bore when viewed on the front face of the gear
case.
- For horizontally ported pumps the shaft abutment spacer
is placed in the top bearing bore.
Step 6
Removing Gearcase Cover
1. Remove screws (6).
2. Remove gearcase cover (5) after breaking the gasket seal
then press out the lip seal (7). It is essential to renew the lip
seal prior to reassembly.