Safety Instructions; General Precaution; Special Safety Instructions For The Plant Operator; Special Hazards - Mankenberg VV Serie Originalbetriebsanleitung

Original operating manual
Vacuum breaker VV

4 Safety instructions

4.1 General precaution

The same safety regulations apply to a fitting as to the system into which it is installed. These instructions only
give those safety recommendations that have to be additionally observed for the fitting.

4.2 Special safety instructions for the plant operator

The following requirements for the intended use of a fitting are not the responsibility of the manufacturer but
have to be guaranteed by the user.
» The fitting may only be employed for the purpose described in section Intended use [} 4].
» Only competent specialist personnel may install, operate and service the fitting. Competent as defined in
these instructions refers to persons who, because of their training, specialist knowledge and professional
experience, are capable of correctly assessing and properly executing the work with which they are
entrusted and of recognizing and rectifying hazards.
» The pipeline system must be properly designed and installed so that the fitting can be mounted and
operated without any tension.
» The fitting must be properly installed in the correct mounting position.
» A vacuum breaker valve with an open spring must be installed in such a way that it presents no risk of
crushing to the operating personnel.
» The usual flow rates should not be exceeded in the pipeline section during continuous operation, and
abnormal operating conditions such as vibrations, water shocks and cavitation should be avoided or – if
unavoidable – clarified with the manufacturer in advance.
» The prevailing operating conditions must comply with the limits of the design data stated in the
MANKENBERG order confirmation.
» Dust and dirt from the surroundings could contaminate internal functional parts of the fitting or the medium.
» The corrosion protection for the fitting must be adapted to the local conditions.
» The fitting must not be coated with thermal insulation.
Detailed notes are provided on some of these prerequisites in the following sections.

4.3 Special hazards

It is necessary to ensure on site, by an appropriate installation or by providing safety devices
and/or positioning a clearly visible warning sign in accordance with the regulations of EN 292
(formerly accident prevention regulations), that effective protection is afforded against objects
danger of
catching on an exposed spring in the vacuum breaker.
fatalities
If required, MANKENBERG will assist in selecting a suitable type with closed bonnet.
Failure to observe this regulation may mean danger to life and limb.
Before a fitting is removed from the system or before a fitting is dismantled but partially
remains in place, the pressure in the system on both the inlet and outlet side must be
completely reduced so that there is no uncontrolled flow of the medium out of the system.
danger of
In the case of toxic or hazardous media, the system must be completely drained before the
being
fitting is removed.
crushed
Caution is required with residues that might continue flowing.
VV-4.X.22.3 Issue 01.09.2022
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