Installation Steps - Mankenberg UV 5.1 ATEX H2 Betriebsanleitung

Supplement to the Operating Instructions for
Back pressure regulators UV 5.1 ATEX H2
» 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 back pressure 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 back pressure 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.
In the case of toxic or hazardous media, a leakage line must be installed, that discharges
leaking medium safely and pressureless in case of a damaged control device, thus avoiding
dangerous situations.
danger of
fatalities The diameter should match the connection of the leakage line at the bonnet.
» The pressure-regulating valve should first be adjusted during the initial start-up by setting the adjusting
screw on the spring module to the operating conditions – see section Initial start-up [} 17].
However, it is necessary to ensure before installation that there is sufficient room for the appropriate socket or
open-jawed spanner above/below the adjusting screw.
As a general rule, pressure-regulating valves should be installed in horizontal lines so that
the spring module (with open spring or with bonnet) points vertically down.
important Only for gaseous media installation with the spring pointing vertically up is permissible.
note
In case the valve must be emptied completely during operation (angle valves), it must be
installed with the bonnet pointing upwards.
If the valve must be installed in a vertical or diagonal line, increased friction of the functional
parts leading to increased abrasion and impaired regulation are to be expected.

7.3 Installation steps

» Fittings should only be finally unpacked at the installation site and inspected for damage prior to assembly.
Damaged fittings must not be installed.
» It is necessary to ensure that the covers have been removed from all the connection branches before
installation.
UV 5.1 ATEX H2-4.X.22.5 Issue 21.12.2022
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