Installation Of Metering Pumps With Bleed Valve; Basic Installation Notes - ProMinent alpha ALPc 1001 Operating Instructions Manual

Installation, hydraulic
7.1.2 Installation of metering
pumps with bleed valve
Safety notes
CAUTION!
– All the installation and safety notes
for metering pumps without bleed
valves also apply.
Installation of the return line
A return line is additionally connected to the
suction and discharge line.
1. Fasten the tube line to the return hose
nozzle or to the liquid end bleed valve.
PVC hose, soft, 6x4 mm is recom‐
mended.
2. Feed the free end of the return line back
to the storage tank.
3. Shorten the return line so that it does
not dip into the feed chemical in the
storage tank.
20
7.1.3

Basic installation notes

Safety notes
CAUTION!
Danger from rupturing hydraulic com‐
ponents
Hydraulic components can rupture if
the maximum permissible operating
pressure is exceeded.
– Never allow the metering pump to
run against a closed shut-off
device.
– With metering pumps without inte‐
gral relief valve Install a relief
valve in the discharge line.
CAUTION!
Hazardous feed chemicals can escape
With hazardous feed chemicals Haz‐
ardous feed chemicals can leak out
when using conventional bleeding pro‐
cedures with metering pumps.
– Install a bleed line with return into
the storage tank.
Shorten the return line so that it cannot
dip into the feed chemical in the storage
tank.