Safety Instructions; Special Hazards - Mankenberg M Xtra Rp 840 Betriebsanleitung

The markings (in the case of fittings made of deep-drawn stainless steel, they are etched into the body)
should neither be covered nor painted over, so that the fitting remains identifiable.

3 Safety instructions

3.1 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.
3.2 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 1 <Intended use>.
• The operator must ensure that the valve is only used with media for which both the valve and sealing
material are suitable.
• Only competent specialist personnel may install, operate and service the fitting. Competent as defi-
ned 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.
• The recommended installation, as described in the relevant MANKENBERG data sheet <DM 8...> or
<UV 8...>, must be used for the pipeline section into which the pilot-controlled pressure-regulating val-
ve is installed. All control and/or leakage lines that are required on the pressure-regulating valve
must be laid properly, in accordance with the accompanying MANKENBERG data sheet.
• A pressure-regulating 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, unusually high flow rates, etc. 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 MAN-
KENBERG order confirmation.
• The corrosion protection for the fitting must be adapted to the local environmental conditions.
• The fitting must not be coated with thermal insulation.
Detailed notes are provided on some of these prerequisites in the following sections.

3.3 Special hazards

Before a fitting is removed from the system or before a fitting is dismantled but partially re-
mains 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 the case of toxic or hazardous media, the system must be completely drained
danger of
before the fitting is removed.
fatalities
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 devi-
ces and/or positioning a clearly visible warning sign in accordance with the regulations of
danger
EN 292 (formerly accident prevention regulations), that effective protection is afforded
of being
against objects catching on an exposed spring in the pressure-regulating valve.
crushed
If required, MANKENBERG will assist in selecting a suitable type with closed spring cap.
- 3 -
© 2020 MANKENBERG GmbH