2
Safety Chapter
Explanation of the safety information
The following signal words are used in these
operating instructions to identify different
severities of a hazard:
Signal
word
Meaning
WARNI
NG
Denotes a possibly hazardous sit‐
uation. If this is disregarded, you
are in a life-threatening situation
and this can result in serious inju‐
ries.
CAU‐
TION
Denotes a possibly hazardous sit‐
uation. If this is disregarded, it
could result in slight or minor inju‐
ries or material damage.
Warning signs denoting different types of
danger
The following warning signs are used in these
operating instructions to denote different types
of danger:
Warning signs
Type of danger
Warning – danger
zone.
Intended use
n
The DHV-U back pressure valves are only
intended for use with liquids.
n
The DHV-U back pressure valves are used
to create a constant back pressure for pre‐
cise feed rates, for protection against over-
metering or to increase the metering preci‐
sion if the back pressure is fluctuating,
when there is a free outlet or when
metering in a vacuum.
n
The DHV-U back pressure valves are
intended for use in conjunction with pulsa‐
tion dampers to create low-pulsation
metering.
n
Used as relief valves in the bypass they
limit the metering pump operating pres‐
sure.
n
All other uses or modifications are pro‐
hibited.
n
The back pressure valves are not safety
valves according to DIN EN ISO 4126-1.
n
The DHV-U back pressure valve is not to
be used as a completely leak-tight shut-off
device.
n
The back pressure valves are not are not
intended for use with gaseous media or
solids.
n
The back pressure valves are not to be
used with abrasive or crystallising media.
n
The back pressure valves must not come
into contact with media which corrode the
transporting media. This shall also apply to
cleaning media and fats. - see the ProMi‐
nent resistance list in the product cata‐
logue or at www.prominent.com.
n
The back pressure valves must not be
used outside the ambient and operating
conditions as specified in these operating
instructions – see e.g. P-T- chart in the
"Technical Data" chapter, ... .
n
The back pressure valves should only be
operated by trained and authorised per‐
sonnel.
n
You have a duty to observe the informa‐
tion contained in the operating instructions
during the different phases of the system's
service life.
Safety Chapter
42