Alfalaval Toftejorg SaniJet 20 User manual

4107-0142
Covering: Standard, Hastelloy
Q-doc: Equipment Documentation (3.1 Inspection Certificate - EN 10204)
Q-doc + FAT-SAT: Qualification Documentation
Improved surface finish (0.5 µm Ra internal/external media contact parts)
Machines delivered with ATEX/IECEx Certification in accordance with Directive 2014/34/EU
First published: 07-2000
ESE01819-EN13 2019-07
Original manual
Instruction Manual
Alfa Laval Toftejorg™ SaniJet 20 Media Driven

Table of contents
The information herein is correct at the time of issue but may be subject to change without prior notice
1. EC/EU Declaration of Conformity .................................................................. 5
2. Safety .................................................................................................... 6
2.1. Important information ............................................................................. 6
2.2. Warning signs ..................................................................................... 6
3. Introduction ............................................................................................ 7
3.1. Introduction ........................................................................................ 7
3.2. Intended use ...................................................................................... 7
3.3. Patents and trademarks ......................................................................... 8
3.4. Reserved rights for design changes ............................................................ 8
3.5. Marking ............................................................................................ 8
3.6. ATEX/IECEx marking ............................................................................. 9
3.7. ATEX/IECEx temperature class and code ...................................................... 10
4. Installation .............................................................................................. 11
4.1. General description ............................................................................... 11
4.2. Quality system .................................................................................... 11
4.3. Functionality ....................................................................................... 12
4.4. General safety and installation instructions ..................................................... 14
4.5. Specific conditions for safe use in accordance with ATEX/IECEx Certification ............. 15
5. Operation ............................................................................................... 18
5.1. Normal operation ................................................................................. 18
5.2. Safety precautions ................................................................................ 19
6. Maintenance ........................................................................................... 20
6.1. Preventive maintenance .......................................................................... 20
6.2. Reserved rights for design changes of Alfa Laval equipment used in validated processes 20
6.3. Service and repair of ATEX/IECEx certified machines ......................................... 21
6.4. Service and repair of machines ordered with Q-doc and with Q-doc + FAT-SAT .......... 22
6.5. Every 150/300 working hours ................................................................... 23
6.6. Turbine Unit - dismantling and reassembling ................................................... 24
6.7. Cleaner Head Unit - dismantling and reassembling ........................................... 25
6.8. Base Unit - dismantling and reassembling ..................................................... 26
6.9. Rotacheck system ................................................................................ 28
7. Trouble shooting guide ............................................................................... 29
8. Technical data ......................................................................................... 31
9. Product programme .................................................................................. 34
9.1. Standard configurations .......................................................................... 34
9.2. Available add-ons ................................................................................. 36
9.3. Available add-ons for spare parts ............................................................... 37
9.4. Accessories ....................................................................................... 37
10. Parts drawings and lists, service kits and tools ................................................. 38
10.1.Toftejorg SaniJet 20 Media Driven .............................................................. 38
10.2.Toftejorg SaniJet 20 Media Driven with improved surface finish ............................. 40
10.3.Toftejorg SaniJet 20 Media Driven, Hastelloy version ......................................... 42
10.4.Service kits ........................................................................................ 44
10.5.Tools ............................................................................................... 45
3

Table of contents
The information herein is correct at the time of issue but may be subject to change without prior notice
11. General information ................................................................................... 46
11.1.Service and repair ................................................................................ 46
11.2.How to order spare parts ........................................................................ 46
11.3.How to contact Alfa Laval Kolding A/S ......................................................... 46
4

1 EC/EU Declaration of Conformity
The Designated Company
Alfa Laval Kolding A/S
Company Name
Albuen 31, DK-6000 Kolding, Denmark
Address
[phone]
Phone No.
hereby declare that
Tank Cleaning Machine
Designation
Alfa Laval Toftejorg SaniJet 20 Media Driven
Type
From serial number 2019-0001 to 2030-99999
is in conformity with Machinery Directive 2006/42/EC and the following harmonized standard is used:
DS/EN ISO 12100:2011 Safety of Machinery - Risk Assessment
is in conformity with (Ex / ATEX) Directive 2014/34/EU and the following harmonized standards are used:
EN ISO 80079-36:2016, EN ISO 80079-37:2016, DS/EN ISO/IEC 80079-34:2011, Annex A, paragraph A.5.3 Rotating machines
EC Type Examination Certificate no. Baseefa05ATEX0117X and IECEx BAS 19.0063X
II 1G Ex h IIC 85ºC... 175ºCGa
Marking: II 1D Ex h IIIC T85ºC... T140ºCDa
The QAN (Quality Assurance Notification) is carried out by SGS Fimko Oy, Särkiniementie 3, Helsinki 00211, Finland. Notified Body
No. 0598.
EU Type Examination Certification is carried out by SGS Fimko Oy, Särkiniementie 3, Helsinki 00211, Finland. Notified Body no. 0598.
IECEx Certificate of Conformity is carried out by Baseefa Ltd., Rockhead Business Park, Staden Lane, Buxton, Derbyshire SK17 9RZ,
United Kingdom. IECEx Accepted Certification Body (ExCB).
The person authorised to compile the technical file is the signer of this document.
Global Product Quality Manager
Pumps, Valves, Fittings and Tank Equipment Lars Kruse Andersen
Title Name Signature
Kolding 2019-05-01
Place Date (YYYY-MM-DD)
This Declaration of Conformity replaces Declaration of Conformity dated 2016-05-01
5

2 Safety
SaniJet 20
Unsafe practices and other important information are emphasized in this manual.
Warnings are emphasized by means of special signs.
Always read the manual before using the tank cleaning machine!
2.1 Important information
WARNING
Indicates that special procedures must be followed to avoid serious personal injury.
CAUTION
Indicates that special procedures must be followed to avoid damage to the tank cleaning machine
NOTE
Indicates important information to simplify or clarify procedures.
2.2 Warning signs
General warning:
ATEX/IECEx warning:
6

3 Introduction
SaniJet 20
3.1 Introduction
This manual has been prepared as a guide for installing, operating and maintaining your Alfa Laval Toftejorg tank cleaning
machine. Should you require further assistance, our Technical Sales Support department and worldwide net of sales offices are
pleased to help you. Please quote the type, article and serial numbers with all of your enquiries; this helps us to help you. The
type and serial number are placed on the Base house of the tank cleaning machine.
4107-0046
A ( 3 : 1 )
27
4107-0046_1
Get the best and most economical performance from your tank cleaning machine. Insufficient preventive maintenance means
poor performance, unscheduled stops, shorter lifetime and extra costs. On the contrary, good preventive maintenance means
good performance, no unscheduled stops and superior total economy
Warning: Before installing the machine and setting it into operation carefully read the General Installation and Safety
Instructions (page 14) and the special conditions for safe use in accordance with ATEX/IECEx Certification
Directive 2014/34/EU (page 15) and take all necessary precautions according to your application and local
regulations.
NOTE
The illustrations and specifications contained in this manual were effective at the date of printing. However, as continuous
improvements are our policy, we reserve the right to alter or modify any unit specification on any product without prior notice or
any obligation.
The English version of the instruction manual is the original manual. We make reservations in regard to possible mistranslations in
language versions of the instruction manual. In case of doubt, the English version of the instruction manual applies.
3.2 Intended use
It is to be verified by the end-user:
- that the tank cleaning machine is in conformity with respect to tank, vessel or container size in which it will be used.
- that the construction materials (both metallic and non-metallic) are compatibility with product, flushing media, cleaning
media, temperatures and pressure under the intended use.
The tank cleaning machine/rotary jet mixer is intended for use in closed tank, vessel or container. If used in open environment
see 4.4 General safety and installation instructions (page 14).
7

3 Introduction
SaniJet 20
3.3 Patents and trademarks
This Instruction Manual is published by Alfa Laval Kolding A/S without any warranty. Improvements and changes to this
Instruction Manual may at any time be made by Alfa Laval Kolding A/S without prior notice. Such changes will, however,
be incorporated in new editions of this Instruction Manual.
Alfa Laval Kolding A/S. All rights reserved.
The Alfa Laval logotype is a trademark or a registered trademark of Alfa Laval Corporate AB. "Toftejorg" and “SaniJet” are
trademarks or registered trademarks of Alfa Laval Kolding A/S. The Toftejorg™ SaniJet 20 product has patents in the EPO
member states, in the US and in other countries. Other products or company names mentioned herein may be the trademarks
of their respective owners. Any rights not expressly granted herein are reserved.
3.4 Reserved rights for design changes
Alfa Laval is continuously working on improving our equipment and services. In this improvement work Alfa Laval may for
example change the design and material in our equipment. A change in the design will not necessarily entail a change of the
specification and item no. for the equipment.
Alfa Laval reserves the right to change the design of Alfa Laval equipment without any notifications for improvements of our
design.
If Equipment from Alfa Laval is used in connection with, for example, a validated plant, and an order for replacements is
made, the design of the replacement may have been changed even if the specifications /item no. is the same as the existing
installed and validated ones.
When ordering a replacement please contact Alfa Laval sales support in this matter before placing the order.
3.5 Marking
Alfa Laval tank cleaning machines are marked to allow for recognition of type of machine, machine name, serial number and
manufacturing address.
The marking is placed on the base house of the tank cleaning machine.
Serial number explanation
Machines supplied with or without standard documentation:
yyyy-xxxxx: serial number
yyyy: year
xxxxx: 5 digit sequential number
8

3 Introduction
SaniJet 20
3.6 ATEX/IECEx marking
The Alfa Laval Toftejorg SaniJet 20 is certified as category I component. The ATEX certification is carried out by the Notified Body
SGS Fimko Oy, who has issued the certificate no. Baseefa05ATEX0117X.
The IECEx certification is carried out by the Certification Body SGS Baseefa Ltd., who has issued the certificate no. IECEx BAS
19.0063X.
Note
Explosion protection type is constructional safety “c”.
The marking on the ATEX/IECEx certified Alfa Laval Toftejorg SaniJet 20 is as follows (for information on marking position see
section 3.1 Introduction):
Serial number explanation
Machines supplied with or without standard documentation:
yyyy-xxxxx: serial number
yyyy: year
xxxxx: 5 digit sequential number
Serial number explanation
Machines supplied with Q-doc + FAT-SAT documentation:
yyyy-FAT-SAT-xxx: serial number
yyyy: year
xxx: 3 digit sequential number
9

3 Introduction
SaniJet 20
3.7 ATEX/IECEx temperature class and code
The maximum surface temperature depends mainly on operating conditions which are the temperature of the cleaning fluid and
the ambient temperature.
Group II EPL Ga
The gas temperature class is corrected with a safety margin of 80% due to a requirement for Group ll EPL Ga equipment.
The gas temperature class depends on the cleaning fluid temperature or the ambient temperature, whichever of the two is
the highest.
Table for determining temperature class (gas atmospheres)
Gas
Temperature class
Cleaning fluid temperature,
Tp(°C)
Ambient temperature,
Tamb (°C)
85°C (T6) ≤+68°C ≤+68°C
100°C (T5) ≤+80°C ≤+80°C
135°C (T4) ≤+108°C ≤+108°C
175°C ≤+140°C ≤+140°C
Group III EPL Da
The dust temperature class depends on the cleaning fluid temperature or the ambient temperature, whichever of the two is
the highest.
No dust layer is considered.
Table for determining temperature class (dust atmospheres)
Dust
Temperature code
Cleaning fluid temperature,
Tp(°C)
Ambient temperature,
Tamb (°C)
T85°C ≤+85°C ≤+85°C
T100°C ≤+100°C ≤+100°C
T135°C ≤+135°C ≤+135°C
T140°C ≤+140°C ≤+140°C
Example of gas class determination
Cleaning fluid temperature is 67°C and ambient temperature is 75°C.
Gas class = T5
ATEX/IECEx marking on the equipment:
II 1G Ex h IIC 85°C…175°C Ga
II 1D Ex h IIIC T85°C…T140°C Da
10

4 Installation
SaniJet 20
4.1 General description
The Alfa Laval Toftejorg SaniJet 20 is a tank cleaning machine intended for industrial use in closed tanks for processing storage
and transportation. There is a broad range of application areas within pharmaceutical, food and chemical industries.
The Alfa Laval Toftejorg SaniJet 20 is a sanitary cleaning device of the rotary jet head type for permanent installation that
provides a 360° indexed cleaning pattern. Provided it is installed in an upright position, the Alfa Laval Toftejorg SaniJet 20 is
completely self-cleaning and self-draining, and it has an integrated self-cleaning down pipe (patent pending). The drive
mechanism is located outside the tank or process equipment, leaving a minimum of parts to be submerged into the product.
All product contact surfaces are AISI 316/316L, duplex SAF 2205, Ti, Hastelloy C22/C276 stainless steel and USP Class VI
and/or FDA approved polymer materials such as PEEK, EPDM, Viton and FFKM.
No threads or screws have been used in the product contact areas.
The cleaning device is lubricated by the cleaning media. No oil, grease or other lubricants are used.
The Alfa Laval Toftejorg SaniJet 20 is available in media driven or motor driven (air) version. The motor driven version is
equipped with a magnetic clutch providing a leakage-proof transmission and provide an effective drive for low flow machines
in rough environments. The air motor has variable speed in order to adjust cleaning intensity. The air version is covered by
Instruction Manual IM-TE91A793.
The Alfa Laval Toftejorg SaniJet 20 is designed for use in pharmaceutical, biotechnological, food and dairy processing
applications. Tanks and vessels between 0.5-30 m3 (130-8,000 US gallons). The design makes the Alfa Laval Toftejorg
SaniJet 20 especially well suited when processing high viscous, foaming or thixotropic products and in chemical processing
applications, where product cross contamination is unacceptable and must be avoided.
For use in explosive hazard zones the SaniJet 20 media driven ATEX/IECEx version can be used, provided it is installed
according to safety instructions in local regulations.
4.2 Quality system
The Alfa Laval Toftejorg SaniJet 20 is produced according to Alfa Laval Kolding’s ISO 9001 International Standard certified
quality system. All parts are made from certified material and all non-metal parts are made from FDA and USP Class VI
approved materials. (Viton is, however, not USP Class VI approved).
11

4 Installation
SaniJet 20
4.3 Functionality
Alfa Laval Toftejorg SaniJet 20 consists of 3 main parts: The Drive unit with flow inlet and the Base housing placed outside
the tank, and inside the tank: the Down pipe with the rotating Outer tube and the Cleaner unit.
The flow of the cleaning fluid passes from the inlet through the Base housing,
through the Down pipe, into the Cleaner head and out through the Nozzles.
TheOutertubeoftheDownpipeisrotably suspended on a Stationary shaft
with a Ball bearing inside the Outer tube. The Drive mechanism rotates the
Outer tube with the Cleaner unit around the vertical axis. Via a set of Bevel
gears on the Stationary shaft and the Cleaner head, the Cleaner head with the
Nozzles is simultaneously rotated around the horizontal axis in a fixed relation
thus moving the nozzles and the jets 360°around in the tank making a pre-set
indexed cleaning pattern.
The Alfa Laval Toftejorg SaniJet 20 utilises the patented “Golden Section” cleaning pattern. The distance between the tracks
of the jets ensures an efficient removal of remaining product from the tank surface right from the beginning of the cleaning
sequence, allowing for short cleaning time.
Example - 2 nozzle machine:
TD523451
TD523452 TD523453
0.8 min. 2.3 min. 6 min.
The time needed to perform a proper cleaning depends on type of soilage, distance, cleaning procedure and agent. For
substances that are easily mobilised, i.e. are easy to remove, less than 1 min. could be sufficient while in cases of more heavy
soilage (high viscous, sticky substances, etc.) a more dense pattern/longer time will be needed.
The machine is driven by the cleaning media, which is supplied under pressure via the inlet connection. The flow enters the Inlet
cap tangentially and rotates the Impeller. The velocity of the liquid determines the rotation speed of the Impeller. This depends
on the actual flow rate and the size of the inlet opening. The Inlet cap is made with two different size openings.
The Impeller shaft is in mesh with a Planet gear, of which the
Output shaft rotates the Down pipe with the Cleaner unit.
The Planet gear is placed in the middle of the flow and thus
flushed through axially while in operation, securing that all the
Gear parts are thoroughly lubricated and cleaned. Bearings
are designed to allow flow through the bearings for lubrication
and cleaning.
*
4107-0047 *Main flow, rotation of impeller
12

4 Installation
SaniJet 20
Self-cleaning
Apart from the main flow flushing the inside of the Base housing and the Down pipe, and thereafter forming the jets through the
Nozzles, fluid is flushed through all internal cavities, through Bevel gear, Ball bearings and gabs between moving parts and is
finally also used for cleaning of the outside surfaces of the machine. From the gab between the Base housing and the rotating
Down pipe, a cleaning jet is directed against the Down pipe, thus loosening and removing product remains on the outside. A
liquid film flushing all around the tube further assists by continuously transporting away loosened product remains. The front of
the Cleaner head is flushed by a liquid flow from the gab between the Cleaner head and the Retaining ring.
In order to ensure a proper self-cleaning, the machine must be installed in an approx. upright position and the inlet pressure
must be min. 3 bar. In the bottom of the Cleaner head, in the Retaining ring, the machine is equipped with a hole to ensure
self-draining. This self-draining is only ensured, if the machine is installed in an upright position.
Cleaning Pattern, The Golden Section
The patented Golden Section cleaning pattern (EP-Patent No.: 0495883. US-Patent No.: 5,279.675) is unique in building up
the pattern in an ultimate uniform way. The pattern starts very coarse and refines itself in a step-less way by laying out the
tracks approximately in the middle between the two most distant tracks already made. This means that the jets always clean
the areas containing most remaining product, and thereby remove as much deposit as possible in the shortest possible way.
In case a complete cleaning pattern is not required, it will be possible to reach the same cleaning level within half the time and
by using half the amount of cleaning fluid compared to a traditional step-wise cleaning pattern. Furthermore, due to the uniform
cleaning pattern, the cleaning can be stopped at any time, whereas with traditional non-uniform cleaning pattern this would not
be advantageous. However, after the complete cleaning pattern has been established, the difference between the Golden
Section and the traditional stepwise cleaning pattern is negligible.
Golden Section - Cleaning pattern Traditional - Cleaning pattern
TD523454 TD523455
13

4 Installation
SaniJet 20
4.4 General safety and installation instructions
The Alfa Laval Toftejorg SaniJet 20 is designed to be installed in a vertical upright position.
It is recommended to install a filter with mesh size 250 µm (0,0001") in the supply line in order to avoid particles, scale etc.
from clogging inside the machine. It is essential to avoid fine solid particles, such as fine sand, in the cleaning fluid as they
will increase wear considerably. This is particular important in case of recirculation.
In order to prevent accidental leakage of cleaning fluid into the tank it is recommended to install a shut-off valve close to
the machine inlet. This will also prevent back-flow of liquid from the tank through the machine in case the cleaner head is
submerged and there is an over-pressure inside the tank. The installation and operation shall be made in such a way
that the draining of the machine is ensured.
It is recommended that the fluid valve fitted is of a type that prevents hydraulic shocks, which may cause severe damage to
the entire installation.
Before installation, all supply lines and valves must be thoroughly flushed to remove remains of welding electrodes,
grinding dust, scale and other foreign matter.
During handling and installation handle the machine with care in order not to damage the fine surface finish of the machine.
The Alfa Laval Toftejorg SaniJet 20 machine has been tested in a test tank, according to Alfa Laval test procedures at the
factory before shipping. For the media driven version it is advised to check if the shipping has made any damaged to the
machine which may cause performance disturbance. This is done by blowing compressed air into the inlet and verify that the
machine rotates evenly. If resistance is recognised, the machine should be disassembled in order to localise the cause.
Note: Do not try to turn Nozzle head by hand, since this may damage the Gear. Nozzle head can be turned by blowing air
from an air pistol through the inlet connection of the media driven machine or the intake port of the air motor.
NOTE
The machine shall be installed in accordance with national regulations for safety and other relevant regulations and standards. In
EU-countries the complete system must fulfil the EU-machine Directive and depending of application, the EU-Pressure Equipment
Directive, the EU-ATEX/IECEx Directive and other relevant Directives and shall be CE-marked before it is set into operation.
Warning: Precautions shall be made to prevent starting of the cleaning/mixing operation, while personnel are inside
the tank or otherwise can be hit by jets from the nozzles.
For information on use in potential explosive atmospheres see paragraph 4.5 Specific conditions for safe use in accordance with
ATEX/IECEx Certification page 15.
14

4 Installation
SaniJet 20
4.5 Specific conditions for safe use in accordance with ATEX/IECEx Certification
Directive 2014/34/EU
NOTE
Explosion protection type is constructional safety “c”.
Warning: Operated in a hazardous area
The unit my be operated in a hazardous area only when completely filled with cleaning fluid/steam.
If a medium other than the cleaning fluid/steam is passed through the equipment, the flow must not be high
enough to cause the equipment to operate.
Warning: Operating guidance
The unit shall be operated in line with guidance provided by IEC/TS 60079-32-1 for tank cleaning.
Warning: Temperature class and ambient temperature range
The maximum surface temperature depends mainly on operations conditions which is the temperature of the
cleaning fluid and ambient temperature.
The temperature class and ambient temperature range are shown in paragraph 3.7 ATEX/IECEx temperature
class and code, page 10.
Warning: Max. permitted temperature
When working:
The maximum permitted cleaning fluid temperature and ambient temperature is 95°C.
When not working:
The maximum permitted ambient temperature is 140°C.
Warning: Draining using compressed air
Draining using compressed air must not be done in ex classified zone.
Draining using compressed air is possible in non ex classified zones (see page 36).
Warning: Earthing
All metal and other conductive or dissipative material should be connected to earth with the exception of very
small items.
For further information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards,
guidance. With focus on clause 6.2.3, 7.2.1, 7.3, 7.9.2, 13.
Warning: Earthed when in use
The unit must be effectively earthed at all times when in use.
15

4 Installation
SaniJet 20
4.4 Specific conditions for safe use in accordance with ATEX/IECEx certification
Warning: Max. permitted steaming temperature
The maximum permitted steam temperature trough the machine and ambient temperature is 140°C.
Warning: Steaming tanks larger than 100 m³
Tanks with capacities larger than 100 m³ that could contain a flammable atmosphere should not be steam
cleaned, as steam cleaning tanks produces an electrostatically charged mist. Tanks smaller than 100 m³ may
be steam cleaned.
For further information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards,
guidance. With focus on clause 7.10 and 8.5.
Tank size information
NOTE: The tank cleaning machine has been certified by accredited notified body and can operate in tanks having an enclosed
volume up to 100 m³ as long as all ATEX/IECEx warnings in the instruction manual are complied with.
General guidelines for tanks larger than 100 m3:
Tanks larger than 100 m³ must not be steam cleaned – See guide IEC/TS 60079-32-1:2013 clause 7.10.5 and 8.5
To use the unit in tanks larger than 100m³ is possible under certain conditions.
It is necessary to know the current factors such as tank size, cleaning solvent and product.
Additives can be used in the cleaning solvent, or, for example, the tank can be filled with nitrogen. The basic guidelines are
described in the guide IEC/TS 60079-32-1:2013.
It must be ensured that the equipollently bonding of all conductive metal objects is in accordance with national regulations
for use.
The cleaning fluid conductivity must correspond to the products in the group “High conductivity”, cf. IEC/TS 60079-32-1:2013
clause 7.1 and 7.2.
High conductivity > 10 000 pS/m
Medium conductivity between 25 × εr pS/m and 10 000 pS/m
Low conductivity <25×εrp
S/m
For liquids with a dielectric constant of around 2, (e.g. hydrocarbons), these classifications reduce to:
High conductivity >1000
0pS/m
Medium conductivity between 50 pS/m and 10 000 pS/m
Low conductivity <50pS/m
Following a guidance document such as IEC/TS 60079-32-1:2013 to establish safe use of machinery and process is the users
own responsibility and is not covered by the ATEX/IECEx certification for this unit except for tanks up to 100 m3.Forfurther
information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards, guidance with focus on
clause 7.1.3, 7.1.4, 7.2.1, 7.2.4.
16

4 Installation
SaniJet 20
Warning: Process generated electrostatic
The user must address the electrostatic hazards generated from the process of the equipment in accordance
with guidance document IEC/TS 60079-32-1:2013.
Warning: Electrostatically charged liquid
Liquids can become electrostatically charged when they move relative to contacting solids or the spraying of
liquids can also create a highly charged mist or spray. The liquid must be made electrically conductive by
additives or otherwise.
For further information see IEC/TS 60079-32-1:2013 Explosive atmospheres – Part 32-1: Electrostatic hazards,
guidance. With focus on clause 7.1.3, 7.1.4, 7.2.1, 7.2.4.
Warning: Appropriate cleaning fluid
The cleaning fluid should be appropriate for the application (e.g. so no chemical reaction can take place between
the cleaning fluid and the residue of process fluid/powder/compound which can generate heat or a hybrid mixture).
Chemical reactions in Zone 20 - Hybrid mixtures:
End-user must ensure that the cleaning fluid used does not create a hybrid mixture according to IEC
60079-10-1:2015 Annex I.1 in connection with powder / dust residues in the tank in zone 20.
This should ensure that the atmosphere does not change to a classification that lies outside the machine’s
certified scope. When the machine is used for cleaning tanks containing potentially flammable dust atmospheres,
and a potentially flammable fluid is used as the cleaning fluid then an assessment of the hybrid mixture shall be
undertaken by the user, prior to operation.
For further information see IEC 60079-10-1:2015 Explosive atmospheres – Part 10-1: Classification of areas –
Explosive gas atmospheres. With focus on clause 3.6.6 and Annex I – Hybrid mixtures.
Warning: Fluid pressure
The maximum permitted cleaning fluid pressure is 13 bar.
In addition to the above mentioned precautions relating to the ATEX/IECEx guidelines Directive 2014/34/EU, the Safety
Precautions on page 14 must be observed.
17

5Operation
SaniJet 20
5.1 Normal operation
Cleaning Media
Use only cleaning fluids, which are compatible with Stainless Steel AISI 316/316L, SAF2205, Titanium, Hastelloy C22/C276,
PEEK, EPDM, Viton and FFKM. Please note that PEEK is not resistant to concentrated sulfuric acid. Normal detergents,
moderate solutions of acids and alkalics are acceptable as well as a number of solvents at ambient temperature during
cleaning. Aggressive chemicals, excessive concentrations of chemicals at elevated temperatures as well as certain solvents and
hydrochlorides should be avoided. If you are in doubt, contact your local Alfa Laval sales office.
Product
In cases where the machine is submerged in, or in other ways exposed to, product the compatibility between stainless
steel AISI 316, SAF 2205, PEEK, FFKM, FPM (Viton), EPDM, Titanium and Hastelloy C22/C276 and the product must be
considered carefully.
NOTE
EPDM swells significantly exposed to fatty materials.
Pressure
Avoid hydraulic shocks. Increase pressure gradually. Do not exceed 12 bar inlet pressure. Recommended inlet pressure: 5-8
bar (73 - 116 psi). High pressure in combination with high flow rate increase consumption of wear parts. High pressure also
reduces the cleaning effect.
The machine is designed to stand up to 13 bar working pressure. This is normally not recommended but may be used for
special purposes, where high pressure at close distance is preferred.
Draining using compressed air
If the machine is drained using compressed air, then the compressed air pressure must not cause the machine body rotation to
exceed 4.5 rpm (corresponding to approx. 13 sec. per rev of the body) in order to avoid risk of machine breakdown.
Draining should always be done inside the tank.
See paragraph 4.5 Specific conditions for safe use in accordance with ATEX/IECEx Certification (page 15).
Steam cleaning
If stream cleaning is done through the machine, the steam pressure must not cause the machine body rotation to exceed 15
rpm (corresponding to approx. 4 sec. per rev of the body) in order to avoid risk of machine breakdown. See paragraph 4.5
Specific conditions for safe use in accordance with ATEX/IECEx Certification (page 15).
Temperature
The maximum recommended cleaning fluid temperature is 90oC. The maximum recommended steam temperature is 140oC.
The maximum ambient temperature is 140oC.
See paragraph 4.5 Specific conditions for safe use in accordance with ATEX/IECEx Certification (page 15).
After use cleaning
After use flush the machine with fresh water. Cleaning media should never allow to dry or settle in the system due to possible
"salting out" or "scaling" of the cleaning media. If cleaning media contains volatile chloride solvents, it is recommended not to
flush with water after use, as this might create hydrochloric acid.
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5Operation
SaniJet 20
5.2 Safety precautions
The machine is intended for use inside a tank only. As peak velocity of main jets reaches 40 m/s, Alfa Laval Toftejorg SaniJet 20
must not be operated in open air or when tank is open.
Warning: Hot chemicals and steam under pressure may be used for cleaning and sterilising. Protect against scalding
and burning. Never tamper with or try to open clamps or other connections while system is in operation. Make
sure that system is depressurised and drained before disassembly.
The cleaning jets impinging the tank surface are a source of noise. Depending on pressure and distance to the tank walls,
noise level may reach up to 85 dB.
Warning: Retaining screw on side of Base housing (17) must never be loosened, when machine is mounted in tank
unless down pipe is supported and Pressure line is disconnected, as otherwise the complete Down pipe
assembly will fall down.
Warning: Tanks may contain poisonous/hazardous products or products which represent an environmental or safety
risk. Never open tank and dismount the machine without checking previous tank contents and necessary
precautions.
See also 3.7 ATEX/IECEx temperature class and code, page 10.
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6 Maintenance
SaniJet 20
6.1 Preventive maintenance
In order to keep your tank cleaning machine servicing you as an efficient tool in your tank cleaning operations, it is essential to
maintain its high performance by following a simple preventive maintenance programme.
Good maintenance is careful and regular attention!
The following recommended preventive maintenance is based on tank cleaning machines working in average conditions.
However, you will appreciate that a tank cleaning machine, which has a rough and dirty job to do, will need more frequent
attention than one working in ideal conditions. We trust that you will adjust your maintenance programme to suit.
Handle machine with care. Take proper action to protect fine surfaces from being damaged.
Always use only proper tools. Use Toftejorg™ SaniJet 20 standard tool kit (page 45). If not stated otherwise never use
unnecessary force (i.e. hammer or pry) components together or apart. Always perform all assembly/disassembly steps in
the order described in this manual.
Never assemble components without previous cleaning. This is especially important at all mating surfaces.
Work in a clear well lighted work area.
6.2 Reserved rights for design changes of Alfa Laval equipment used in validated processes
Alfa Laval is continuously working on improving our equipment and services. In this improvement work Alfa Laval may for
example change the design and material in our equipment. A change in the design will not necessarily entail a change of the
specification and item no. for the equipment.
Alfa Laval reserves the right to change the design of Alfa Laval equipment without any notifications for improvements of our
design.
If Equipment from Alfa Laval is used in connection with, for example, a validated plant, and an order for replacements is
made, the design of the replacement may have been changed even if the specifications /item no. is the same as the existing
installed and validated ones.
When ordering a replacement please contact Alfa Laval sales support in this matter before placing the order.
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