4 Areas of application and function
sera diaphragm relief valves can be used for liquid media
without solid matters but exclusively for the intended use as
specified by the manufacturer.
sera diaphragm relief valves protect especially oscillating dis-
placement pumps which, in theory, can build up a infinitely
high pressure. If pressure lines are restricted or closed the
pressure may reach a multiple of the permissible system pres-
sure, e.g. owing to clogged lines (foreign matters, crystals) or
closed shut-off valves, clogged nozzles or filters etc.
CAUTION !
As sera diaphragm relief valves cannot reduce accelera-
tion pressure peaks with oscillating displacement pumps
an additional pulsation damper is to be provided.
CAUTION !
sera diaphragm relief valves are no safety valves as per
the requirements of the regulations for pressure systems
2014/68/EU.
CAUTION !
Do not change the setting of the relief valve!
5 Test / identification
sera diaphragm relief valves are tested in our works and set to
an operative pressure.
The set pressure corresponds to the technical delivery condi-
tions which are indicated on the type plate (see Fig.
01/02/Table 01).
Lid
Seal
Cover
Type plate
Fig. 02
6 Checking the packaging at the place of
destination
On delivery, immediately check the packaging for damage.
Report any external damage immediately to the transport
company, and fill out a damage report. After the transport
company has recorded the damage, open the package and
check the contents for damage.
7 Storage
An undamaged packaging protects the unit during subsequent
storage and should only be opened when the diaphragm relief
valve is installed.
Proper storage increases the service life of the diaphragm re-
lief valve and comprises prevention of negative influences
such as heat, humidity, dust, chemicals etc.
The following storage instructions are to be observed:
• Storage place: cool, dry, dust-free and slightly ventilated
• Storage temperatures between -10°C and +45°C
• Relative air humidity not more than 50%.
If these values are exceeded, metal products should be sealed
in foil and protected from condensation water with a suitable
desiccant.
Do not store solvents, fuels, lubricants, chemicals, acids, disin-
fectants and similar in the storage room.
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