Normal Operation - Mankenberg M Xtra Rp 840 Betriebsanleitung

8 Normal operation

A properly designed pressure-regulating valve works automatically and does not need any form of auxi-
liary energy.
To obtain optimum regulating accuracy, the desired operating pressure should be in the upper
part of the setting range of the pressure-regulating valve. This is described in detail in the "DM"
Section of the MANKENBERG catalogue under "Calculation of Pressure
Regulators".
note
In case of doubt, contact MANKENBERG Service – see Section 11 <Further information> for
addresses.
It is necessary to ensure that the materials selected for the parts of the fitting in contact with
media are suitable for the media in use. The manufacturer accepts no liability for any dama-
ge due to corrosion by aggressive media on parts made of unsuitable materials.
danger of
Failure to observe this regulation may mean danger to life and limb and may cause
fatalities
damage to the pipeline system and to the fitting.
The fitting has functional parts that have to remain capable of moving easily. Make sure
that both the external springs and inner parts in contact with the medium cannot freeze nor
become blocked by dirt. Observe the maintenance intervals.
caution
Failure to observe this instruction may cause damage to the pipeline system and to
the fitting.
In some series a control line is laid between the pressure-regulating valve and the pipeline
– see Section 5.1 <Installation / General notes>.
Damage to this control line may result in danger to life and limb and may impair the
danger
function of the pressure-regulating valve or even lead to complete failure.
Pilot-controlled pressure-regulating valves are designed for the operating location in
accordance with the order. The restrictor assembly has 2 or 3 integrated restrictors with which
the operating response to pressure fluctuations can be influenced.
danger
Incorrect setting of the restrictors can cause damage in the system.
Pilot-controlled pressure-regulating valves are designed for the operating point in
accordance with the order. This operating point may occasionally be changed by the custo-
mer by means of the adjusting screw. However, the setting of the adjusting screw must not
be permanently altered (e.g. by adding a valve actuator)..
note
Failure to observe this instruction may cause damage to the pressure-regulating valve.
It is recommended that the fitting should be inspected to ensure that it is functioning correctly after each
new start-up.
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