Installation Of Metering Pumps With Self-Bleeding (Sek Type) - ProMinent Beta b BT4b Series Operating Instructions Manual

Installation, hydraulic

8.1.3 Installation of metering pumps with self-bleeding (SEK type)

Safety information
Installation of the return line
24
1. Attach the hose line to the return hose nozzle or to the liquid end
bleed valve. PVC hose, soft, 6x4 mm is recommended.
2. Feed the free end of the return line into the storage tank.
3. Shorten the return line so that it is not immersed in the feed chem‐
ical in the storage tank.
CAUTION!
– All the installation and safety information for
metering pumps without self-bleeding also apply.
– Do not exceed the maximum values for priming lift,
priming pressure and viscosity of the feed chemical.
– Do not allow the suction side line cross-section to
exceed the line cross-section on the suction valve.
Information about priming pressure
Make sure that the priming pressure on the suction
–
end is at least equal to the return line pressure.
Priming pressure in the return line restricts the
–
bleeding function.
– However, operation with priming pressure in the
return line and the suction end at atmospheric pres‐
sure is possible.
A return line is also connected in addition to the suction and discharge
line.
The return line is connected to the vertical valve on
–
the upper side of the liquid end. It is factory-labelled
with a red sleeve - see Ä 'Installation of the return
line' on page 24.
The discharge line is connected to the horizontal
–
valve.
1. Attach the hose line to the return hose nozzle or to the liquid end
bleed valve. PVC hose, soft, 6x4 mm is recommended.
2. Feed the free end of the return line into the storage tank.
3. SEK only: Insert the return line into the anti-kink device on the bleed
valve and screw it in place until the anti-kink device engages.
The anti-kink device prevents the return line from
kinking, avoiding the risk of self-bleeding failure.
4. Shorten the return line so that it is not immersed in the feed chem‐
ical in the storage tank.