Protection When Using A Return Connection - Ecolab CONNEXX Basic Manuel Technique

5.2

Protection when using a return connection

Fig. 5.2
Pos. Description
1 Supply of compressed air
2 Solenoid valve
3 Injector
4 Exhaust air area
5 Check valve
6 Lifting vessel
7 Container suction tube
8 Pump suction tube
The lifting vessel is not suitable for pressures above atmospheric. Provision must be made
for the product to flow back into the container in order to prevent pressure from building up
CAUTION
in the suction line. The possible return quantity by gas release must not exceed the available
volume in the container, and this must be taken into account when designing the metering
line.
During the container switch-over, the valves are closed with the unit switched off (power-
ATTENTION
off). Hence, a return flow is only possible in the on-state.
The threaded rods prevent the cap from being pushed upwards if fluid hammer occurs. Cap
NOTE
and bottom must not be tightened hard against the threaded rods.
417101375_Connexx.doc
Pos. Description
9 Return tube
10 Pump
11 Multiple function valve
12 Diaphragm valve
(1 closed if 2 open, and vice-versa)
13 Metering valve
14 Metering point
15 Diaphragm valve (manually operated)
- 45 - Rev. 11-02.10