7
Installation
CAUTION!
Danger of injury to personnel and material damage
Disregarding the technical data when installing may lead to
personal injuries or damage to property.
–
Observe the technical data- refer to chapter "Technical
Data" and, where applicable, the operating instructions
of the accessories.
7.1 Installation, hydraulic
WARNING!
EX pumps in areas at risk from explosion
–
Metering pumps in areas at risk from explosion are as a
matter of course provided with a suitable safety relief
valve on the outlet side of the metering pump (which is
used to protect against excessive heating due to over‐
loading and impact sparks caused by the breakage of
power end parts triggered by overloading).
–
Piston metering pumps are designed for applications in
temperature class T3. Pumps are suitable for T4 with an
additional flow control on the outlet side (to protect it
from excess temperature following running dry) or a suit‐
able temperature monitor.
–
In the event of differing temperature classes amongst
the diverse components, operation of the complete
pumps should be based on the component with the
lowest temperature class.
–
Ensure that installations in areas at risk from explosion
are checked by a "recognisably trained" skilled opera‐
tive.
–
Please note the relevant national regulations during
installation!
WARNING!
Warning of feed chemical reactions to water
Feed chemicals that should not come into contact with water
may react to residual water in the liquid end that may origi‐
nate from works testing.
–
Blow the liquid end dry with compressed air through the
suction connector.
–
Then flush the liquid end with a suitable medium through
the suction connector.
WARNING!
The following measures are an advantage when working with
highly aggressive or hazardous feed chemicals:
–
Install a bleed valve with recirculation in the storage
tank.
–
Install an additional shut-off valve on the discharge or
suction ends.
Installation
17
Содержание Sigma / 2 Basic Type SBKa
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