Alfalaval OS12 User manual

3205-0000
100000817-EN2 2021-03
Original manual
Instruction Manual
Alfa Laval OS Twin Screw Pump

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CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411

Table of contents
The information herein is correct at the time of issue but may be subject to change without prior notice
1. EC Declaration of Conformity ....................................................................... 4
2. General description ................................................................................... 6
2.1. General description ............................................................................... 6
3. Safety .................................................................................................... 7
3.1. Important information ............................................................................. 7
3.2. Warning signs ..................................................................................... 8
3.3. Safety precautions ................................................................................ 9
3.4. Recycling information ............................................................................. 11
4. Installation .............................................................................................. 12
4.1. Unpacking, Handling and Storage .............................................................. 12
4.2. System design and installation .................................................................. 14
4.3. Flushing seal arrangement and pre-start up checks .......................................... 18
5. Maintenance ........................................................................................... 20
5.1. Cleaning in place (CIP) ........................................................................... 20
5.2. Maintenance schedule ........................................................................... 21
5.3. Dismantling ........................................................................................ 22
5.4. Assembly .......................................................................................... 30
5.5. Maintenance seals - Single Seal - All Models .................................................. 39
5.6. Single Flushed Seal - All Models ................................................................ 41
5.7. Double Seal OS1x ................................................................................ 43
5.8. Double Seal OS2x, OS3x, OS4x ................................................................ 46
5.9. Heating (option) ................................................................................... 49
5.10.Rectangular Inlet (option) ......................................................................... 50
5.11.Trouble shooting .................................................................................. 51
6. Technical data ......................................................................................... 52
6.1. Technical data ..................................................................................... 52
6.2. Pumphead Clearance information .............................................................. 54
7. Parts list ................................................................................................ 55
7.1. Twin Screw Pump Range (All Models) .......................................................... 55
3
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4
CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411

1 EC Declaration of Conformity
Revision of Declaration of Conformity 2009-12-29
The Designated Company
Alfa Laval Eastbourne, Alfa Laval Ltd
Company Name
Birch Road, Eastbourne, East Sussex BN23 6PQ
Address
[phone]
Phone No.
hereby declare that
Pump
Designation
OS12, OS14, OS16, OS22, OS24, OS26, OS32, OS34, OS36, OS42, OS44, OS46
Ty p e
From serial number 10.000 to 1.000.000
is in conformity with the following directive with amendments:
- Machinery Directive 2006/42/EC
The person authorised to compile the technical file is the signer of this document
Global Product Quality Manager
HFH Lars Kruse Andersen
Title Name
Kolding 2021-03-31
Place Date Signature
5
CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411

2 General description
2.1 General description
The Alfa Laval OS range of pumps is of conventional Twin Screw pump design with the positive displacement
being provided by non-contacting, contra rotating screws within a fully swept pump chamber.
Handling from low to high viscosity pumped media, the pump’s characteristic smooth, low shear pumping
action is ideal in application areas such as Dairy, Food, Beverage, Home & Personal Care Industries.
The pump can also be run at high speeds for CIP (clean in place) cleaning of the pump and system.
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A) Front cover
B) Pump Casing
C) Seal Housing
D) Gearbox
E) Coupling Guard
F) Motor
G) Baseplate
3205-0049
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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.
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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 80 dB[A]. When necessary, protection against noise should be taken.
6
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3 Safety
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
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3.1 Important information
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Contact details for all countries are
continually updated on our website.
Please visit www.alfalaval.com to access the information directly.
7
CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411

3 Safety
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
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3.2 Warning signs
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8
CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411

3 Safety
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
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3.3 Safety precautions
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read the technical data thoroughly. (See chapter 6 Technical data).
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start in the wrong direction of rotation with liquid in the pump.
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put your hands or fingers inside the port connections or anywhere close to rotating shafts.
!
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have the pump electrically connected by authorized personnel. (See the motor instruction supplied
with the drive unit)
Alfa Laval recommends the supply disconnecting device shall be in accordance with EN 60204-1.
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read the technical data thoroughly. (See chapter 6 Technical data)
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stand on the pump or pipelines.
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run the pump with either the suction side or the pressure side blocked.
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e
v
v
e
e
r
r
put your hands or fingers inside the port connections or anywhere close to rotating parts.
!
N
N
e
e
v
v
e
e
r
r
run the pump unless fully assembled and all guards are securely fitted, i.e. pump head must not
be removed from gearcase.
A
A
l
l
w
w
a
a
y
y
s
s
ensure any guards are securely fitting and in good condition.
N
N
e
e
v
v
e
e
r
r
touch the pump or the pipelines when pumping hot liquids or when sterilising.
In certain operating conditions external surfaces of the pump and/or ancillary equipment may
exceed 80oC. As such users should avoid touching the pump and/or ancillary equipment during
operation taking precautions if it is unavoidable to do so.
Only handle toxic and acidic liquids in accordance with the manufacturers instructions and
recommendations.
M
M
a
a
i
i
n
n
t
t
e
e
n
n
a
a
n
n
c
c
e
e
:
:
A
A
l
l
w
w
a
a
y
y
s
s
read the technical data thoroughly. (See chapter 6 Technical data)
A
A
l
l
w
w
a
a
y
y
s
s
ensure adequate Personal Protective Equipment (PPE) is worn during any maintenance activities.
N
N
e
e
v
v
e
e
r
r
service the pump when it is hot.
!
The pump and the pipelines must n
n
e
e
v
v
e
e
r
r
be pressurised when the pump is serviced.
N
N
e
e
v
v
e
e
r
r
put your hands or fingers inside the port connections or anywhere close to rotating parts.
Installation and operation of the pump must always comply with any local health and safety regulations.
Any hazardous and/or hot, drained or leaked, liquid shall be disposed in compliance with any local health
and safety regulations. If requested at the time of quotation,
the equipment can be supplied with a means of safe containment of any hazardous and/or hot, drained or
leaked liquid (Drip Pan).
A
A
l
l
w
w
a
a
y
y
s
s
ensure the power supply is disconnected (in an off position) and is locked out to prevent accidental
operation.
Please refer to any motor/geared motor and coupling operating manuals supplied with the unit for
maintenance instructions.
Always ensure pump and ancillary equipment has been allowed to cool before touching.
!
9
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3 Safety
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
A
A
l
l
w
w
a
a
y
y
s
s
r
r
e
e
a
a
d
d
t
t
h
h
e
e
m
m
a
a
n
n
u
u
a
a
l
l
b
b
e
e
f
f
o
o
r
r
e
e
u
u
s
s
i
i
n
n
g
g
t
t
h
h
e
e
p
p
u
u
m
m
p
p
!
!
T
T
r
r
a
a
n
n
s
s
p
p
o
o
r
r
t
t
a
a
t
t
i
i
o
o
n
n
:
:
T
T
r
r
a
a
n
n
s
s
p
p
o
o
r
r
t
t
a
a
t
t
i
i
o
o
n
n
o
o
f
f
t
t
h
h
e
e
p
p
u
u
m
m
p
p
o
o
r
r
t
t
h
h
e
e
p
p
u
u
m
m
p
p
u
u
n
n
i
i
t
t
:
:
N
N
e
e
v
v
e
e
r
r
lift or elevate in any way other than described in this manual
A
A
l
l
w
w
a
a
y
y
s
s
drain the pump head and accessories of any liquid
A
A
l
l
w
w
a
a
y
y
s
s
ensure that no leakage of lubricants can occur
A
A
l
l
w
w
a
a
y
y
s
s
transport the pump in it’s upright position
A
A
l
l
w
w
a
a
y
y
s
s
ensure that the unit is securely fixed during transportation
A
A
l
l
w
w
a
a
y
y
s
s
use original packaging or similar during transportation
A
A
l
l
w
w
a
a
y
y
s
s
use a suitable transport device i.e. forklift truck or pallet lifter
10
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3 Safety
3.4 Recycling information
R
R
e
e
c
c
y
y
c
c
l
l
i
i
n
n
g
g
i
i
n
n
f
f
o
o
r
r
m
m
a
a
t
t
i
i
o
o
n
n
.
.
•
•
U
U
n
n
p
p
a
a
c
c
k
k
i
i
n
n
g
g
- Packing material consists of wood, plastics, cardboard boxes and in some cases metal straps.
- Wood and cardboard boxes can be reused, recycled or used for energy recovery.
- Plastics should be recycled or burnt at a licensed waste incineration plant.
- Metal straps should be sent for material recycling.
•
•
M
M
a
a
i
i
n
n
t
t
e
e
n
n
a
a
n
n
c
c
e
e
- During maintenance oil and wear parts in the machine are replaced.
- All metal parts should be sent for material recycling.
- Worn out or defective electronic parts should be sent to a licensed handler for material recycling.
- Oil and all non metal wear parts must be taken care of in agreement with local regulations.
•
•
S
S
c
c
r
r
a
a
p
p
p
p
i
i
n
n
g
g
- At end of use, the equipment shall be recycled according to relevant, local regulations. Beside the equipment itself, any
hazardous residues from the process liquid must be considered and dealt with in a proper manner. When in doubt, or in the
absence of local regulations, please contact the local Alfa Laval sales company.
11
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4 Installation
4.1 Unpacking, Handling and Storage
S
S
t
t
e
e
p
p
1
1
Always ensure any personnel undertaking lifting operations have the suitable experience and training to do so safely.
Always ensure any lifting equipment used is in good condition and has been suitably tested, using lifting logs when applied.
Always refer to the pump weights guide (Section 6) and ensure any lifting equipment used is rated for and used within
the load limits.
Always ensure that the lifting points are in line with the centre of gravity and adjust lifting point if necessary.
Always keep an eye on the load and stay clear during the lifting operation.
The diagram below show examples of how the equipment can be lifted, however the user is to ensure this can be done
safely with the equipment at hand:
Pump with drive unit Bareshaft pump
3205-0050 3205-0001
S
S
t
t
e
e
p
p
2
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.
12
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4 Installation
S
S
t
t
e
e
p
p
3
3
After receipt and inspection, if the pump is not to be installed immediately, the pump should be repacked in the original
packaging 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.
- A clean, dry storage location free from vibration and without direct sunlight or UV light should be selected.
- Temperature range between -5 to +40oC (23 to 104oF)
- Relative humidity <60%.
- If a moist or dusty atmosphere is used for storage, further protect the pump or unit with a suitable cover.
- No exposure to corrosive substances, including those contain in the air.
- Rotate the pump/pump unit by hand weekly, to prevent bearing damage.
- All associated ancillary equipment should be treated similarly.
13
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4 Installation
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.
4.2 System design and installation
D
D
e
e
s
s
i
i
g
g
n
n
:
:
- 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.
- 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.
P
P
i
i
p
p
e
e
w
w
o
o
r
r
k
k
:
:
The pump must not be used to support piping. All inlet and outlet piping on the pump unit must be independently supported.
Failure to observe this may distort the pump head components or pump assembly and cause serious permanent damage.
D
D
i
i
r
r
e
e
c
c
t
t
i
i
o
o
n
n
o
o
f
f
f
f
l
l
o
o
w
w
:
:
The standard direction of flow as built is indicated by arrows affixed to the pump showing the direction of flow and drive shaft
rotation. Reverse flow direction is possible for short durations if reverse flow pressure limits are observed.
If permanent reverse flow operation is required, then changes to the bearing configuration and screw housing orientation need
to be made to ensure safe operation but with reduced maximum pressure limits. Failure to do so may lead to pump damage.
For pressure limits please see 6 Technical data.
3205-0002
3205-0003
Inlet axial in the front cover Inlet top in the seal housing
Outlet top in seal housing Outlet axial in front cover
14
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4 Installation
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.
P
P
u
u
m
m
p
p
L
L
u
u
b
b
r
r
i
i
c
c
a
a
t
t
i
i
o
o
n
n
:
:
The pump will be supplied filled with food grade oil with NSF/NSDA H1 Approval. The oil level can be checked using the oil
site glass on the side of the gearbox. Oil level must be checked with the pump not running.
It is recommended to change the oil every 4000 hours of pump operation.
Oil should be drained by removing the oil drain plug on the side of the gearbox and filled by removing the gearbox vent plug.
Recommended Oils
Food Grade Oil (NSF H-1)
-20oCto+150
oC (-4oF to 302oF)
Jax Flow-Guard Synthetic ISO100
Castrol Optileb GT Cassida FL 100
Shell / Fusch Cassida Fluid FL or HF 100
Klüber Klüberoil 4 UH1 6-100
Mobil SHC Cibus 100
All oils are poly-alpha-olefin based please check before mixing with other base oils.
B
B
a
a
s
s
e
e
p
p
l
l
a
a
t
t
e
e
F
F
o
o
u
u
n
n
d
d
a
a
t
t
i
i
o
o
n
n
s
s
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 approx. 150 mm (6 inch.) longer and wider than the baseplate. The depth of the foundation should
be proportional 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.
D
3D
3205-0004
Dmin
0.5 Dmin
c
a
b
3205-0005
4D
10D
a
a) Sleeve 3D
b) Lug welded to bolt head
c) Waste put around bolt before pouring concrete
a) Foundation surface left through to anchor ground
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 wastepaper can be used to prevent the concrete from entering the
sleeve while the foundation is poured. A minimum of 14 days is normally required to allow the curing of the concrete prior
to pump unit installation.
15
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4 Installation
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.
B
B
a
a
l
l
l
l
F
F
o
o
o
o
t
t
B
B
a
a
s
s
e
e
p
p
l
l
a
a
t
t
e
e
w
w
i
i
t
t
h
h
A
A
d
d
j
j
u
u
s
s
t
t
a
a
b
b
l
l
e
e
F
F
e
e
e
e
t
t
The pump can be supplied with an optional ball foot baseplate with height adjustable feet.
When used:
E
E
n
n
s
s
u
u
r
r
e
e
the floor is level and is able to support the weight of the complete unit
E
E
n
n
s
s
u
u
r
r
e
e
the unit is supported by all feet equally
3
3
A
A
A
A
p
p
p
p
r
r
o
o
v
v
e
e
d
d
B
B
a
a
l
l
l
l
F
F
o
o
o
o
t
t
B
B
a
a
s
s
e
e
p
p
l
l
a
a
t
t
e
e
w
w
i
i
t
t
h
h
A
A
d
d
j
j
u
u
s
s
t
t
a
a
b
b
l
l
e
e
F
F
e
e
e
e
t
t
For 3A approved mounted pumps a 3A approved ball foot baseplate is required which has additional sealant applied.
3205-0054
Fully sealed underneath
16
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4 Installation
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.
C
C
o
o
u
u
p
p
l
l
i
i
n
n
g
g
a
a
l
l
i
i
g
g
n
n
m
m
e
e
n
n
t
t
:
:
Before the pump unit is installed is it 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. 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 misalignment for the couplings as stated below. Shaft alignment that is outside the stated
tolerances can be corrected by applying shims under the motor or pump foot, or, by moving the pump or drive sideways on
the baseplate. All bolts that have been loosened should be re-tightened to the stated torque figure.
T
T
h
h
e
e
f
f
o
o
l
l
l
l
o
o
w
w
i
i
n
n
g
g
d
d
i
i
m
m
e
e
n
n
s
s
i
i
o
o
n
n
s
s
a
a
n
n
d
d
t
t
o
o
l
l
e
e
r
r
a
a
n
n
c
c
e
e
s
s
a
a
p
p
p
p
l
l
y
y
t
t
o
o
s
s
t
t
a
a
n
n
d
d
a
a
r
r
d
d
s
s
u
u
p
p
p
p
l
l
y
y
c
c
o
o
u
u
p
p
l
l
i
i
n
n
g
g
s
s
o
o
n
n
l
l
y
y
.
.
P
P
a
a
r
r
a
a
l
l
l
l
e
e
l
l
m
m
i
i
s
s
a
a
l
l
i
i
g
g
n
n
m
m
e
e
n
n
t
t
Measure 4 positions at 90° around coupling
C
C
o
o
u
u
p
p
l
l
i
i
n
n
g
g
s
s
i
i
z
z
e
e
D
D
i
i
m
m
e
e
n
n
s
s
i
i
o
o
n
n
A
A
M
M
a
a
x
x
i
i
m
m
u
u
m
m
70 0.3 mm (0.011 inch)
90 0.3 mm (0.011 inch.)
110 0.3 mm (0.011 inch.)
130 0.4 mm (0.015 inch.)
150 0.4 mm (0.015 inch.)
180 0.4 mm (0.015 inch.)
230 0.5 mm (0.019 inch.)
280 0.5 mm (0.019 inch.)
A
3205-0006
A
A
n
n
g
g
u
u
l
l
a
a
r
r
m
m
i
i
s
s
a
a
l
l
i
i
g
g
n
n
m
m
e
e
n
n
t
t
Measure 4 positions at 90° around coupling
C
C
o
o
u
u
p
p
l
l
i
i
n
n
g
g
s
s
i
i
z
z
e
e
D
D
i
i
m
m
e
e
n
n
s
s
i
i
o
o
n
n
B
B
M
M
a
a
x
x
i
i
m
m
u
u
m
m
70 1°
90 1°
110 1°
130 1°
150 1°
180 1°
230 1°
280 1°
3205-0007
Bo
A
A
s
s
s
s
e
e
m
m
b
b
l
l
e
e
d
d
l
l
e
e
n
n
g
g
t
t
h
h
C
C
o
o
u
u
p
p
l
l
i
i
n
n
g
g
s
s
i
i
z
z
e
e
D
D
i
i
m
m
e
e
n
n
s
s
i
i
o
o
n
n
L
L
±
±
1
1
.
.
0
0
m
m
m
m
(
(
0
0
.
.
0
0
4
4
i
i
n
n
c
c
h
h
.
.
)
)
70 25 mm (0.98 inch.)
90 30.5 mm (1.20 inch.)
110 45 mm (1.77 inch.)
130 53 mm (2.08 inch.)
150 60 mm (2.36 inch.)
180 73 mm (2.87 inch.)
230 85.5 mm (3.36 inch.)
280 105.5 mm (4.15 inch.)
3205-0008
L
R
R
e
e
c
c
o
o
m
m
m
m
e
e
n
n
d
d
e
e
d
d
b
b
o
o
l
l
t
t
t
t
o
o
r
r
q
q
u
u
e
e
s
s
.
.
Thread Diameter M6 M8 M10 M12 M16 M20 M24
Torque (Nm) 615 30 50 120 150 200
Torque (ft lbf) 4.4 11.0 22.1 36.8 88.5 110.6 147.5
17
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4 Installation
4.3 Flushing seal arrangement and pre-start up checks
S
S
t
t
e
e
p
p
1
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 on both sides for the seals (see below).
- A compatible flushing fluid is used and supplied at the correct pressure and flow rate (See below).
- 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.
S
S
t
t
e
e
p
p
2
2
C
C
o
o
n
n
n
n
e
e
c
c
t
t
i
i
n
n
g
g
t
t
h
h
e
e
f
f
l
l
u
u
s
s
h
h
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.
S
S
t
t
e
e
p
p
3
3
X
X
X-X 3205-0009
c
a
b
c
a
b
a) Outlet
b) Seal retention
c) Inlet
Flush Connection Size:
Pump Model Std. Connection Opt. Connection
OS1x G 1/4" 1/4" NPT
OS2x G 1/4" 1/4" NPT
OS3x G 1/4" 1/4" NPT
OS4x G1
/2" 1/2" NPT
S
S
t
t
e
e
p
p
4
4
F
F
l
l
u
u
s
s
h
h
i
i
n
n
g
g
f
f
l
l
u
u
i
i
d
d
The choice of flushing fluid is dependent upon the fluid being pumped and duty conditions i.e. pressure and temperature. Usually
water is used for cooling or flushing water soluble products. For single and double flushed mechanical seal arrangements the
temperature of flush media should never be allowed to exceed the maximum temperature of the pumped media. For advice on
selecting a suitable flushing fluid please contact pump supplier.
S
S
t
t
e
e
p
p
5
5
F
F
l
l
u
u
s
s
h
h
i
i
n
n
g
g
p
p
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s
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a
a
n
n
d
d
f
f
l
l
o
o
w
w
r
r
a
a
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t
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e
Single flushed mechanical seal 0.5 bar (7 psi) maximum. Any further increase in pressure will result in lip seal failure.
Double flushed mechanical seal 16 bar (232 psi) maximum or 6 bar (87 psi) over product pressure.
The flushing flow rate must be adequate to ensure that the temperature limitation of the seals is not exceeded.
M
M
i
i
n
n
i
i
m
m
u
u
m
m
f
f
l
l
o
o
w
w
r
r
a
a
t
t
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e
r
r
e
e
q
q
u
u
i
i
r
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e
e
d
d
p
p
e
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r
r
s
s
h
h
a
a
f
f
t
t
s
s
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a
a
l
l
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i
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3
3
0
0
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/
/
h
h
r
r
(
(
0
0
.
.
1
1
3
3
u
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)
)
18 CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411

4 Installation
S
S
t
t
e
e
p
p
6
6
P
P
r
r
e
e
-
-
s
s
t
t
a
a
r
r
t
t
u
u
p
p
c
c
h
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c
c
k
k
s
s
- 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.
19
CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411

5 Maintenance
5.1 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.
T
T
y
y
p
p
i
i
c
c
a
a
l
l
C
C
I
I
P
P
p
p
r
r
o
o
c
c
e
e
d
d
u
u
r
r
e
e
1. Flush through the system with clean cold water or bore water (6°C) (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 clean cold water again.
W
W
a
a
r
r
n
n
i
i
n
n
g
g
s
s
- N
N
e
e
v
v
e
e
r
r
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.
- A
A
l
l
w
w
a
a
y
y
s
s
handle celaning agents with care and follow manufactures instructions and safety
datasheets.
- A
A
l
l
w
w
a
a
y
y
s
s
rinse well with clean water after using a cleaning agent.
!
- A
A
l
l
w
w
a
a
y
y
s
s
use rubber gloves and protective goggles when handling caustic agents.
- A
A
l
l
w
w
a
a
y
y
s
s
store/discharge cleaning agents in accordance with current rules/directives.
C
C
I
I
P
P
p
p
r
r
o
o
c
c
e
e
s
s
s
s
u
u
s
s
i
i
n
n
g
g
s
s
e
e
p
p
a
a
r
r
a
a
t
t
e
e
C
C
I
I
P
P
p
p
u
u
m
m
p
p
s
s
/
/
s
s
y
y
s
s
t
t
e
e
m
m
s
s
:
:
If CIP pumps or a central CIP unit are used for CIP, i.e. cleaning fluids simply flow through the OS twin screw pump as with all
other system parts, please note the following:
– If the system pressure is >1bar, the OS pump must be locked to prevent turbining.
– If the pump runs slowly with the flow, the inlet pressure must be <1 bar, i.e. a negative differential pressure should be avoided.
S
S
I
I
P
P
m
m
e
e
t
t
h
h
o
o
d
d
Dry running of the pump with steam will cause damage to the shaft seal.
When steam is flowing through the pipes, make sure that the pump is switched off.
Slow rotation with the shaft is possible if the pump has a single flushed seal or double shaft seal (<100 1/min).
The OS twin screw pumps are only suitable for the SIP (Sterilisation In Place) method in consultation with Alfa Laval.
Suitability depends on the choice of elastomers. The maximum sterilisation temperature is 145°C (293°F).
20
CONTACT CSI FOR MORE INFORMATION | CSIDESIGNS.COM | [email protected] | 417.831.1411