ProMinent Sigma 1 S1Cb, Operating Instructions Manual, Page: 29 / 120

WARNING!
Product can be dangerously contaminated
Only with "Physiologically safety with regard to wetted
materials” version:
If the integral bleed valve or the integral relief valve
opens, the feed chemical comes into contact with phys‐
iologically harmful seals.
–
Do not route feed chemical that escapes from the
integral bleed valve or the integral relief valve back
into the process.
CAUTION!
Danger due to incorrect use of the integral relief valve
The integral relief valve can only protect the motor and
the gear, and then only against impermissible positive
pressure that is caused by the metering pump itself. It
cannot protect the system against positive pressure.
–
Protect the motor and gear of the system against
positive pressure using other mechanisms.
– Protect the system against illegal positive pressure
using other mechanisms.
CAUTION!
Warning of feed chemical spraying around
If no overflow line is connected to the integral relief valve
or the integral bleeder valve, feed chemical will spray out
of the hose connector as soon as the relief valve opens.
–
Always connect an overflow line to the integral relief
valve or the integral bleeder valve and feed it back
into the storage tank or - if required by the regula‐
tions - into a special storage tank.
CAUTION!
Danger of cracking
Cracks on the PVT liquid end can occur if a metal over‐
flow line is connected to the relief valve.
–
Never connect a metal overflow line to the relief
valve.
CAUTION!
Danger of the integral relief valve failing
The integral relief valve no longer operates reliably with
feed chemicals that have a viscosity of greater than 200
mPa s.
–
Only use the integral relief valve with feed chemicals
that have a viscosity of up to 200 mPa s.
Integral relief valve or integral bleeder
valve
Installation
29