Introduction; Intended Use - Mankenberg M Xtra Rp 840 Betriebsanleitung

0 Introduction

This manual is intended to assist users of a MANKENBERG pilot-controlled pressure-reducing or over-
flow valve during installation, operation and maintenance. Read the manual thoroughly before installing
or putting this valve into service.
Failure to follow the following instructions – particularly the cautionary and warning
notes – may lead to hazards and may invalidate the manufacturer's warranty. MENKEN-
BERG is at your servíce for any assistance and queries. See Section 11 <Further informati-
caution
on> for the addresses. Technical information is also available at www.mankenberg.de

1 Intended use

A pilot-controlled MANKENBERG pressure-reducing valve DM.. is a device that is intended exclusi-
vely for automatically regulating the outlet pressure of the medium (without any additional electrical/
pneumatic energy) after it has been installed in a pipeline system.
The force of the outlet pressure acts on a pilot valve. This controls the main valve so that if the outlet
pressure falls below the target value, the main valve opens further (or entirely) until the target value
has been re-established. If the outlet pressure rises above the target value, the main valve reduces or
closes.
The pilot valve is integrated onto the main valve together with a restrictor assembly. The restrictor as-
sembly contains 2 or 3 restrictors for optimizing the regulation characteristics and 1 strainer. The desi-
red target value for the setting range must be set on the adjusting screw of the pilot valve.
A pilot-controlled MANKENBERG backpressure regulator UV.. is a device that is intended exclusi-
vely for automatically regulating the inlet pressure of the medium (without any additional electrical/
pneumatic energy) after it has been installed in a pipeline system.
The force of the inlet pressure acts on a pilot valve. This controls the main valve so that if the inlet pres-
sure falls below the target value, the main valve is reduced (or closed) until the target value has been
re-established. If the inlet pressure increases above the target value, the main valve opens.
The pilot valve is integrated onto the main valve together with a restrictor assembly. The restrictor as-
sembly contains 2 or 3 restrictors for optimizing the regulation characteristics and 1 strainer. The desi-
red target value for the setting range must be set on the adjusting screw of the pilot valve.
A pilot-controlled pressure-reducing or backpressure regulator does not begin to operate
until Δp > 2bar; the valve does not react if the difference from the target value is lower than
this. If the control function is to operate at a lower differential pressure, special models or
note
normal pressure-reducing and overflow valves should be used.
A pilot-controlled pressure-reducing or backpressure regulator is not a safety valve.
A suitable valve must be present in the pipe section to limit any excess pressure.
note
After installation, the pilot valve must be adjusted to the desired inlet or outlet pressure. The
pressure gauges needed for this must not be mounted directly on the valve and are there-
fore not included in the supply schedule. Suitable pressure display devices are needed on
note
the plant side.
MANKENBERG planning documents are available to give users precise assistance in selecting and de-
signing the appropriate fitting, e.g.:
In the section
<DM: Regulating valves for pressure>
<Design of pressure-regulating valves>
<Know-how on pressure-reducing valves / backpressure regulators >
<Type sheet RP.8...>
with technical data and tables of the setting ranges and the dimensions.
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