English (GB)
19
6. Operation
6.1 Description of the system
Fig. 30
Functional scheme VGS-141, -143, -145
Fig. 31
Front hood to take off, with swing-out clear vision flap
TM
04 08
19 491
7
1
2
3
4
5
6
8
7
9
10
11
T
M
04
0
8
2
0
49
17
17
18
Item Component
Description
1
Line to the injector
2
Differential pressure regulator
It regulates the difference of the pressures before and after the rate valve to a
constant value.
• Adjusted dosing flow stays constant, even when the injector vacuum fluctuates.
• with electronic vacuum sensor (option)
3
Electronics (option)
Measuring amplifier for the chlorine concentration Conex
®
DIA-2Q or Conex
®
DIS-2Q
• amplifies the signal of the optional measuring cell
4
Clamp box (option)
5
Servomotor
6
Rate valve
Adjusting the desired gas flow
• manually with the hand wheel
or
• automatically with an electrical servomotor (5) (option)
• servomotor can optionally be equipped with a 4 - 20 mA signal input for
proportional control (no further electronics necessary)
7
Measuring tube
Displays the gas flow
• with magnetic detection of the floater position (option)
8
Vacuummeter
Displays the injector vacuum
• with limit contacts (option)
9
Sensor for the operation vacuum
(option)
For measuring the vacuum at the inlet of the gas dosing system
10
Line from the vacuum regulator
11
Foot
17
18
Front hood (17) to take off, with swing-
out clear vision flap (18)
Caution
The rate valve is not a perfectly closing shut-off
valve!
