Special Hazards - Mankenberg Rp 824 Originalbetriebsanleitung

Original operating manual
pilot-operated pressure regulators RP 824
» 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.
» 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 valve 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
MANKENBERG 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.

4.4 Special hazards

WARNING
Residues of toxic or hazardous media may result in serious injuries or death.
Before a valve is removed from the system or before a valve is dismantled but partially
remains in place, the pressure in the system on both the inlet and outlet side must be
completely reducedso 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 before the
valve is removed.
» If a valve is removed from a system with a toxic medium and is taken out of the system:
The valve must be professionally decontaminated before being repaired.
WARNING
When the valve is being disassembled, the spring pretension can cause
serious or fatal injuries.
If a pressure control valve must be disassembled:
» Use the adjusting screw on the spring module to fully relieve the spring pressure by
turning it counterclockwise. When doing so, be sure to observe the notes in the Initial
start-up section!
» Either tightly close the two shut-off valves installed upstream and downstream of the
valve according to the Mankenberg installation diagram and bleed the pressure control
valve or depressurize the system section.
» Remove the valve from the piping.
RP 824-4.X.231 Issue 17.11.2023
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