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

Installation, hydraulic

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

Safety notes
Installation of the return line
26
3. Shorten the return line hose so that it cannot submerge into the feed
chemical in the storage tank.
CAUTION!
– All of the installation and safety notes for metering
pumps without self-bleeding also apply.
– The maximum values for priming lift, priming pressure
and the viscosity of the feed chemical may not be
exceeded.
– The suction end hose line cross section may not exceed
the hose line cross section of the suction valve.
Information about priming pressure
The priming pressure on the suction end must be 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 pressure is pos‐
sible.
A return line is connected in addition to the suction and discharge lines.
The return line is connected to the vertical valve on the
–
upper side of the liquid end. It is labelled with a red
sleeve from factory - see Fig. 7.
– The discharge line is connected to the vertical valve.
1. Fasten the tube line to the return line tube nozzle or to the liquid end
bleed valve. PVC tube, soft, 6x4 mm is recommended for this.
2. Feed the free end of the return line back to 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 form
kinking, thereby avoiding the risk of self-bleeding
system failure.
4. Shorten the return line hose so that it cannot submerge into the feed
chemical in the storage tank.