Installation Preparations - Mankenberg DM Originalbetriebsanleitung

Original operating manual
Pilot-controlled pressure regulators DM

6.2 Installation preparations

» It is necessary to ensure that a fitting is not installed unless its matches the operating conditions in terms of
function, pressure and temperature, range, body material as well as connection type and dimensions.
No fitting may be operated that does not have a sufficient pressure and temperature range for
the operating conditions – see section Intended use [} 4] and markings on the fitting. The
manufacturer MANKENBERG should be consulted in the case of any applications outside of
danger of
this range.
fatalities
Failure to observe this regulation may mean danger to life and limb and may cause
damage to the pressure-regulating valve.
» Newly installed tanks and pipeline sections must be thoroughly rinsed and cleaned before commissioning
» The corrosion protection for the fitting must be adapted to the local conditions.
» A pressure-regulating valve with an exposed spring must be installed in such a way that it presents no risk
of crushing to the operating personnel.
Only valves with open spring:
It is necessary to ensure on site, by an appropriate installation (e.g. not freely accessible) or
providing safety devices and/or positioning a clearly visible warning sign in accordance with
danger of
the regulations of EN 292 (formerly accident prevention regulations), that effective protection is
being
afforded 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 bonnet.
Failure to observe this instruction: danger of crushing for the operating personnel
» Before installing a pressure-regulating valve, it is necessary to make sure that the pipeline section complies
with the recommended installation, as described in the relevant MANKENBERG data sheet. In particular, a
safety valve and a suitable strainer should be installed upstream of the fitting.
» Pressure-regulating valves are supplied with a slackened spring:
– in this state of delivery, a pressure reducing valve DM is fully opened and immediately shuts at minimum
outlet pressure.
– in this state of delivery, an backpressure regulator UV is fully closed and immediately opens at minimum
inlet pressure.
– in this state of delivery, a differential pressure control valve, a flow control valve or a vacuum control
valve responds as a pressure reducing valve or backpressure regulator, according to design.
In some model series, a control line has to be laid between the pressure-regulating valve and
the pipeline by the customer – this is described in the above-mentioned recommended
installation.
note
Please note: Only use control lines made of metal, not of plastic!
- distance of valve/connection of control line to the pipeline ≥ 10x pipe-ø
- when the medium is steam, lay the control line at an angle, with the gradient falling towards
the valve, see (catalogue) section <Know How Pressure-reducing valves>.>.
The control line should match the connection on the fitting.
- if required, install a throttle to avoid vibration.
DM-4.X.222 Issue 18.07.2022
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