Special Hazards; Transport And Storage - Mankenberg UV 5.1 ATEX H2 Betriebsanleitung

Supplement to the Operating Instructions for
Back pressure regulators UV 5.1 ATEX H2

5.3 Special hazards

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. In
danger of
the case of toxic or hazardous media, the system must be completely drained before the fitting
fatalities
is removed.
Caution is required with residues that might continue flowing.
Only valves with open spring:
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
danger of
(formerly accident prevention regulations), that effective protection is afforded against
being
objects catching on an exposed spring in the pressure-regulating valve.
crushed
If required, MANKENBERG will assist in selecting a suitable type with closed bonnet.
If a pressure-regulating valve has to be dismantled:
The following must be observed at all costs: First release the tension fully on the spring by
danger of turning the setting screw on the spring module anticlockwise. DWhen doing so, be sure to
fatalities
follow the notes in section Initial start-up [} 17]!
Then either seal off the two shut-off valves installed before and after the fitting in accordance
with the MANKENBERG installation recommendation and vent the pressure-regulating valve
or remove the pressure from the section of the system and then remove the fitting from the
pipeline.
If a fitting is removed from a system with a toxic medium and is taken out of the plant:
it must be properly decontaminated before repair.
caution

6 Transport and storage

A fitting must be handled, transported and stored with care:
» The fitting must be transported and stored in its protective packaging until it is installed.
The fitting has moving internal parts.
Even packaged fittings should be transported smoothly without any shocks.
caution
In the case of a fitting that can no longer be transported by hand, the lifting gear must be
attached to a suitable position on the housing (branches).
Under no circumstances may the lifting gear be affixed to any attachments (adjusting
caution
screw, handwheel or accessories).
UV 5.1 ATEX H2-4.X.22.5 Issue 21.12.2022
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