7 Installation
CAUTION!
Danger of injury to personnel and material damage
Disregard of technical data during installation may lead
to personal injuries or damage to property.
– Observe the technical data - refer to the "Technical
data" chapter and, where applicable, the operating
instructions for the accessories.
7.1 Installation, hydraulic
WARNING!
Danger of fire with flammable feed chemicals
– Only metering pumps with the identity code option
"Multi-layer safety diaphragm with rupture signalling
with electrical signal" are permitted to meter flam‐
mable media, with back pressures over 2 bar and if
the operator puts in place the appropriate safety pre‐
cautions.
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 originate 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 beneficial when working
with highly aggressive or hazardous feed chemicals:
– Install a bleed valve with recirculation in the storage
tank.
–
Install a shut-off valve on the discharge or suction
side.
CAUTION!
Warning of feed chemical spraying around
PTFE seals, which have already been used / com‐
pressed, can no longer reliably seal a hydraulic connec‐
tion.
– New, unused PTFE seals must always be used.
Installation
26
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