Mankenberg NV 93 Betriebsanleitung Seite 15

Notes on Safety
relating to the installation, operation, maintenance and repair of
Mankenberg products
Basic requirements
The equipment must be installed, repaired and operated only by skilled personnel familiar with the installation, commissioning and operation of the
products. "Skilled personnel" in the meaning of these Installation and Operating Instructions are such persons who, thanks to their professional
training, knowledge and experience and their knowledge of the applicable standards, are capable of assessing the work they are asked to carry out
and recognising the possible dangers. Suitable precautions must be taken to avoid any risks which may be associated with the medium contained in
the pipelines and equipment, with the set pressure or the moving parts.
Preparatory work
First you should make sure that your worksite is safe. Organise the required tools and equipment such as working platform, lifting tackle etc. and
make sure that the lighting of the site is adequate. Find out whether protective clothing, ear protectors etc. are needed or mandatory. Check
whether you have suitable tools and any replacement parts you may need. Use only original MANKENBERG parts. Read the operating instructions
carefully and note all the instructions and points.
Medium contained in pipelines and valves
Check which medium is or was in the pipline and find out what safety precautions you have to take. Be especially careful if the medium is toxic,
flammable, hot or a health hazard.
Connecting a leak line
In the case of toxic or hazardous media the valve must be equipped with a sealed spring cover (incl. sealed setting screw) with leak line connection.
In such cases a leak line must be installed which can drain the medium safely in case the valve becomes defective.
Hazards at the installation site
Please note any areas designated as explosion hazard sites. Make sure that there is sufficient ventilation where a shortage of oxygen may occur e.g.
in tanks, vessels or shafts. Allow hot surfaces to cool. Use welding gear only if the worksite is sufficiently ventilated and there is absolutely no danger
of fire or explosion or a release of agents dangerous to health.
Effects on the entire plant or machine
Check the possible effects which your work may have: How will your work affect the total system? Is there a possibility of danger if, for example,
you close isolating valves, switch off the power supply or switch off/ remove/disable safety equipment and ventilation systems or monitoring and
alarm equipment?
Pipeline and valve operating pressure
Make sure that the pipeline section on which you will be working has been completely depressurised and is under atmospheric pressure. Do not
believe that the system is depressurised only because your pressure gauge reads Zero. Make safe and label any valves you have closed.
Electrical connections
Work on electrical systems must be carried out only by suitably qualified experts. Make sure that the electrical power supply has been switched off
and that the system cannot be repowered.
Dismantling
The equipment may contain a preloaded spring which must be relaxed before the equipment can be dismantled. Please follow the operating and
servicing instructions.
Completing the work
Make sure that the plant or system or machine is fully operational again. Test all monitoring, safety and alarm equipment.
Testing the plant/system
When pressure-testing the plant the equipment or valve may be pressurised only up to its maximum rated pressure.
Commissioning
Check the equipment/valve for leaks before commissioning. Do not tighten the pressure setting screw to such an extent that it limits the valve lift or
jams the valve in open position. Do not slacken the pressure setting screw too far. The valve is no longer operational when the spring is completely
relaxed.
Only with valves free of oil and grease or silicone.
Please pay attention to order an fit only spares free of oil and grease resp. free of silicone.
Always follow the operating instructions.
Please consult our engineering department in case of severe operating conditions or if you have any doubt.