Richter GU/F Series Overflow Valves - Manual (Page 6)

Series GU/F
Page 6
9530-070-en Revision 00
TM 6908 Edition 10/2007
2.1 Intended use
Richter overflow valves of the GU series are pressure-
maintaining components in accordance with the
Pressure Equipment Directive (DGRL) for the
passage of fluids at a given test pressure.
GU are only intended for vertical installation.
The valves are suitable for non-boiling liquids of group
1 in acc. with the Pressure Equipment Directive
(DGRL).
They have a corrosion-resistant plastic lining.
Solids can lead to increased wear, leaks, damage to
sealing surfaces or to a reduction in the service life of
the valve.
The overflow valves are set at the works to the
desired set pressure, tested and lead-sealed.
Exact operating conditions of the overflow valve
selected are documented in the data sheet. There
you will find the performance characteristics such as
the certified coefficient of discharge, flow area, set
pressure, opening pressure, reseating pressure and
materials.
If operating data other than those planned arise,
the operator must examine carefully whether the
design of the valve, accessories and materials is
suitable for the new application (consultation with
the manufacturer).
2.2 For the customer / operator
If an overflow valve is used, the operator must ensure
that
hot or cold valve parts are protected by the
customer against being touched
the valve has been properly installed in the pipe
system
the operating conditions stipulated in the data
sheet are not exceeded in continuous operating
mode.
This is not the manufacturer's responsibility.
Loads caused by earthquakes were not allowed for in
the design.
Fire protection to DIN EN ISO 10497 is not possible
(plastic lining and plastic components).
2.3 Improper operation
The operational reliability of the valve supplied is only
guaranteed if it is used properly in accordance with
Section 2.1 of this operating manual.
The operation limits specified on the
identification plate must under no
circumstances be exceeded.
See also inadmissible modes of operation and their
consequences in Section 7.4.
3 Safety notes for applications in potentially explosive areas
based on the Directive 94/9/ EC (Atex 95)
The valves are intended for use in a potentially
explosive area and are therefore subject to the
conformity assessment procedure of the directive
94/9/EC (ATEX).
As part of this conformity assessment, an ignition
hazard analysis to EN 13463-1 to satisfy the
fundamental safety and health requirements was
conducted with the following result:
The valves do not have any ignition source of
their own.
The valves are not covered by the scope of
application of the ATEX directive and therefore
do not need to be identified accordingly.
The valves may be used in a potentially
explosive area.
It is imperative to observe the individual points of
intended use for application in a potentially explosive
area.
3.1 Intended use
Inadmissible modes of operation, even for brief
periods, may result in serious damage to the
valve.
In connection with explosion protection, potential
sources of ignition (overheating, electrostatic and
induced charges, mechanical and electric sparks)
may result from these inadmissible modes of
operation; their occurrence can only be prevented
by adhering to the intended use.
Furthermore, reference is made in this connection to
the Directive 95/C332/06 (ATEX 118a) which contains
the minimum regulations for improving the
occupational health and safety of the workers who
may be at risk from an explosive atmosphere.