7
Installation
CAUTION!
Danger of injury to personnel and material damage
Disregarding the technical data during installation
can lead to personal injuries or damage to prop‐
erty.
– Observe the technical data - refer to the "Tech‐
nical Data" chapter and, where applicable, the
operating instructions for the accessories.
7.1 Installation, hydraulic
WARNING!
ATEX pumps in areas at risk from explosion
– Metering pumps must have an appropriate
safety relief valve on the discharge side (to
protect against excessive heating due to over‐
loading or impact sparks caused by the
breakage of power end parts).
– Only use the design with Ex”i” design of dia‐
phragm rupture indicator. Make sure that the
diaphragm rupture indicator stops the pump as
soon as a diaphragm has ruptured.
WARNING!
Danger of fire with flammable feed chemicals
– Flammable media may only be pumped using
metering heads made of stainless steel, Has‐
telloy C, PRFE with carbon or PP with carbon.
– Metering pumps can be used for metering
flammable media, but fundamentally only those
designed with an ATEX diaphragm rupture
sensor and a discharge-side flow control,
which both stop the pump as soon as a dia‐
phragm rupture or no flow is detected.
– During filling and draining of the liquid end, an
expert must ensure that feed chemical does
not come into contact with oxygen.
– If necessary, the operator must implement fur‐
ther measures.
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.
Installation
34
