5.2.3 Water apparatus
5.2.3.1
Water apparatus with wetting cone (powder)
A0915
8.
7.
6.
5.
5.
1. 2. 3.
4.
9.
Fig. 6: Water apparatus with wetting cone
1. Shut-off valve
2. Pressure reducer
3. Solenoid valve
4. turboDOS
®
5. Regulating valve
6. Wetting cone
7. Overflow sensor
8. Overflow
9. 3/2-way motorised ball valve
The water pipework supplies the system with the required preparation
water. The pressure reducer with filter insert ensures that the pressure is
limited and maintained at the correct operating pressure. A solenoid valve
automatically opens and closes the water inlet. The flow meter used, con‐
tinuously reports the current flow rate to the control. During commissioning
the two regulating valves are used to set the water flow rate.
The powdered polymer falls into the wetting cone, where it is uniformly
wetted with a partial flow from the preparation water. This ensures
clumping of the feed chemical does not occur.
The main flow of the preparation water produces, by way of a mixing
device, a slight vacuum at the outlet of the cone. Consequently, the wetted
powder is sucked out and then travels with the preparation water into the
Ultromat storage tank
The switching on of the powder feeder is controlled to occur at a time
delay after the solenoid valve activation. Consequently at the start of the
preparation process, no powder deposits can occur in the flush valve.
There is always a water flow for a few seconds before the powder feeder
starts. At the end of the preparation process, the reverse procedure is fol‐
lowed. The system switches off immediately once the upper level is
reached. However, the water continues to run for a few seconds after this.
A manual shut-off valve also shuts off the supply of water if maintenance
work is necessary.
Design and function
20