Installation, Hydraulic - ProMinent EXtronic EXBb Operating Instructions Manual

7

Installation, hydraulic

WARNING!
EX pumps in areas at risk of explosion
– Metering pumps in areas at risk of explosion
are provided, as a matter of course, with an
appropriate safety relief valve on the outlet side
of the metering pump (which is used to protect
against excessive heating due to overloading
and impact sparks caused by the breakage of
power end parts triggered by overloading.)
– Should the various components have differing
temperature classes, scope for using the com‐
plete pump depends on the component with
the lowest temperature class.
– The version with an Ex"i" version of diaphragm
rupture sensor should always be used.
– Ensure that installations in areas at risk of
explosion are checked by a "recognised com‐
petent" person.
– Please note the relevant national regulations
during installation!
WARNING!
Risk of fire with flammable feed chemicals
– Flammable media may only be transported
using stainless steel dosing heads. In excep‐
tional cases where this is not possible, PTFE
with carbon can be used, whereby our TT_ ver‐
sions are manufactured from this conducting
plastic. Here, the operator is urged to take spe‐
cial care due to the low mechanical strength.
– The metering pumps may meter flammable
media, but only in principle versions with the
"intrinsically safe [i,a]" version of the diaphragm
rupture sensor.
– The following applies to all metering pumps for
metering flammable media:
During filling and draining of the liquid end, an
expert must ensure that feed chemical does
not come into contact with air.
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, hydraulic
19