Introduction; Intended Use; Misuse - Mankenberg Rp 824 Originalbetriebsanleitung

Original operating manual
pilot-operated pressure regulators RP 824

1 Introduction

This manual is intended to assist users of a Mankenberg pilot-controlled pressure reducing valve or back
pressure regulator 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. Mankenberg is at your service for any assistance and
queries. See section Further information [Page 26]
Technical information is also available at www.mankenberg.com

2 Intended use

A pilot-controlled Mankenberg back pressure regulator UV is a device that is intended exclusively for self-
actingly 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 pressure 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 throttle block. The throttle block contains 2 or 3
throttles for optimizing the regulation characteristics and 1 strainer. The desired target value for the setting
range must be set on the adjusting screw of the pilot valve.
NOTICE
A pilot-controlled pressure control valve 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 normal pressure
reducing valves and back pressure regulators should be used.
The upper limit of the permitted operating data is permanently marked on the nameplate of each valve supplied
and must be observed.
Service life
The valve is designed for quasi-static operation. 1000 full load variations between 0 bar and PS max (PN or
MAWP) are permitted, based on the entire service life of the pressure vessel; see No. 1.4 AD 2000 sheet S 1.
Relevant pressure surges or dynamic loads are not permissible. The estimated service life is approx. 5 years.

2.1 Misuse

These valves are no shut-off elements ensuring a tight closing of the valve. In accordance with DIN EN 60534-4
and/or ANSI FCI 70-2 they may feature a leakage rate in closed position in compliance with the leakage classes
III.
A pilot-controlled pressure control valve is not a safety valve. A suitable valve must be present in the pipe
section to limit any excess pressure.
A safety valve has to be installed on the control side, which is dimensioned and adjusted in such a way that
the lower one of both pressure indications as mentioned below is relevant as response pressure:
- 1.5 times the maximum setting pressure or (P
- PS (see nameplate)
out
The actuation pressure of the safety valve should be approx. 40% above the max. The setting value of the
pressure control valve.
The response pressure of the safety valve should be abt. 40 % above the max. set pressure of the pressure
control valve.
RP 824-4.X.231 Issue 17.11.2023
for the addresses.
) of the valve (see nameplate)
out
6
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