Operation; Description Of The System - Grundfos Vaccuperm VGS-141 Montage- Und Betriebsanleitung

6. Operation

6.1 Description of the system

4
3
2
1
Fig. 30 Functional scheme VGS-141, -143, -145
Item Component
1 Line to the injector
2 Differential pressure regulator
3 Electronics (option)
4 Clamp box (option)
5 Servomotor
6 Rate valve
7 Measuring tube
8 Vacuummeter
Sensor for the operation vacuum
9
(option)
10 Line from the vacuum regulator
11 Foot
17 Front hood (17) to take off, with swing-
18 out clear vision flap (18)
The rate valve is not a perfectly closing shut-off
Caution
valve!
5
6
8
7
9
10
11
Description
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)
Measuring amplifier for the chlorine concentration Conex
• amplifies the signal of the optional measuring cell
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)
Displays the gas flow
• with magnetic detection of the floater position (option)
Displays the injector vacuum
• with limit contacts (option)
For measuring the vacuum at the inlet of the gas dosing system
Fig. 31 Front hood to take off, with swing-out clear vision flap
17
18
® ®
DIA-2Q or Conex DIS-2Q
21