Alfa Laval Toftejorg TZ-79, Instruction Manual, Page: 14 / 48

Installation and Normal Operation
General Installation and Safety Instructions
The tank cleaning machine should be installed in vertical position (upright or upside down). It is
recommended to install a filter in the supply line in order to avoid large particles to clog inside the
machine. Before connecting the machine into the system, all supply lines and valves should be flushed
to remove foreign matter.
For devices with tapered thread connections to the down pipe, it is recommended that you secure the
connection in a manner appropriate for the application. Subject to the intended use environment and
any in-house user requirements or policies, a liquid threadlocking adhesive such as Loctite No. 243 or
equivalent could be used. Other methods could be acceptable and subject to customer preference.
ATEX
Warning :
If the machine is used in potential explosive atmospheres, tapes or joint sealing
compounds which are electrical insulators must not be used on threads or joints, unless
an electrical connection is otherwise established to ensure an effective earthing. In
addition, connecting pipe work, must be electrically conductive and earthed to the tank
structure. The resistance between the nozzles and the tank structure should not exceed
20,000 Ohm. This is essential to avoid the build-up of static electricity on the machine.
For further information see DS/CLC/TR 50404:2003 Safety of Machinery, guidance and
recommendations for the avoidance of hazards due to static electricity.
Electrical equipment such as magnetic valves and electric actuators must not be installed in Ex-zones
without type approval and marking, corresponding to the EX-class in question.
Note : The machine shall be installed in accordance with national regulations for safety and other
relevant regulations and standards.
Precautions shall be made to prevent starting of the cleaning operation, while personnel are inside the
tank or otherwise can be hit by jets from the nozzles.
In EU-countries the complete system must fulfil the EU-Machine Directive and depending of
application, the EU-Pressure Equipment Directive, the EU-ATEX Directive and other relevant
Directives and shall be CE-marked before it is set into operation.
The machine as delivered has been tested at the factory before shipping. For transportation reasons,
the nozzles have been screwed off after the test. In order to secure the nozzles against falling off due
to vibrations and other external strains it is important that the nozzles are tightened properly after
mounting. If not, the nozzles may be blown off during tank cleaning and cause severe damage on tank,
valves and pump. This is especially important if machines are fixed installed in tanks and vessels within
the transportation sector in trucks, railcars and onboard ships.
Normally, it is sufficient to tighten the nozzles with the specified torque. However, depending on the
application and local policies an extra securing may be preferred.
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