Hach-Lange BUEHLER 3010 4010 4210 4410 Manual - Manual (Page 29)

Operation
Page 29 Manual BÜHLER BU4010ff
Bypass metering vessel
This sampling method is suitable for use in bypass systems with flow-rates from 3 – 20 L/min.
- Patented motor-driven pinch valve which squeezes the dosing hose or the flow-through hose
below the metering vessel.
- No sensor, thus almost no wear.
- Front opening for ease of metering vessel cleaning
- The sample volume can be adjusted between 20 ml and 250 ml by displacing the filling tube
Metering vessel – structure -
1. Sample inlet
2. Hose connection for overflowing water
3. Flange
4. Screw cap
5. Filling level electrodes
6. Metering vessel
7. Adjustable tube – sample volume
8. Screw connection
9. Pinch valve 1 (sample outlet to distributor/bottles)
10. Silicone discharge tube
11. Pinch valve 2 (dosing)
12. Outlet hose
Method of operation
The desired volume can be adjusted between approx. 20 ml and 250 ml by means of the adjustable
tube. To adjust the desired sample volume, loosen the screw connection and displace the filling tube
upwards or downwards.
1. Continous flow
Inoperative Position
2. Pinch valves 1+2 are closed 3. Water is filled up to the
electrodes
6. Inoperative Position
Bypass sampling system
4. Pinch valve 2 is opened.
Water drains off up to the
level of the dosing tube.
5.
Pinch valve 1 is opened
and the sample is filled
into the bottle.