Werbung
Verfügbare Sprachen
Verfügbare Sprachen
Pre-flushing
Before the actual product metering starts, the flush valve ( Fig. 2 ,
flushing the system internally with water. At the same time, the relevant valve of the valve
distributor block (e.g. M1) ( Fig. 2 ,
Fresh water now flows from the water inlet through the mud guard ( Fig. 2 ,
sensor ( Fig. 2 ,
) into the flush valve, from there through the valve distributor block on
9
the product side ( Fig. 2 ,
through the metering line into the washer extractor.
The water flow is monitored by the flow sensor. This process ensures that
there is adequate water flow pressure and, thus, that reliable flushing is
possible.
After the preset flush time has elapsed, the rinsing valve closes again.
Metering
Depending on the stored washing programme parameters, a valve on the product-end
valve distributor block (e.g. P1) ( Fig. 2 ,
) starts, provided that the relevant connected suction lance is in the product container,
12
and there is sufficient product available.
During metering, the product is pumped from the suction lance into the product-end valve
distributor block by the pumps, on to the machine-end valve distributor block and through
the metering line into the washer extractor. The quantity of product flowing through the
unit is monitored by the oval gear meter ( Fig. 2 ,
control unit. When the required metering quantity has been reached, the pump is stopped,
and the valve of the valve distributor block on the product side closes.
In the case of a product container being empty or due to other faults, such as pipe
blocking or pump failure, the metering is stopped by the control unit due to the preset
proportioning time being exceeded, and a fault signal is output. A fault signal is also
output when an empty signal is received from one of the connected suction pipes.
If another product is required by the same washer extractor, this product is
metered only after a variable intermediate rinse (that lasts at least 2 seconds)
has been carried out.
Flushing the lines
Once the metering process for this washer extractor has been completed, flushing with
water takes place.
The flushing valve opens. Fresh water now flows from the water inlet through the mud
guard and flow sensor into the rinsing valve, from there through the valve distributor block
on the product side, through the oval gear meter, through the pumps and on into the
machine-side valve distributor block.
The water flow rate is monitored by the flow rate sensor. The flush valve and the relevant
valve of the valve distributor block on the machine side then close.
From this point on, further metering can already start for another washer
extractor.
, no. 18) opens on the machine side.
6
), on into the valve distributor block at the machine side and
5
) then opens and the metering pump ( Fig. 2 ,
5
31
System description
) opens for
8
), and the signals are evaluated in the
13
MAN053089 Rev. 1-11.2023
) and flow
10
Werbung
