Physical And Chemical Data Of Chlorine; Design And Function; Description Of The Device; Pressure Gauge - Grundfos Vaccuperm VGB-103-100 Serie Notice D'installation Et De Fonctionnement

3.6 Physical and chemical data of chlorine

Under normal conditions of pressure and temperature, chlorine is
a yellowish green gas with a pungent odour, which exists as Cl
molecule.
It is not flammable, but can promote the flammability of metals,
hydrocarbons, etc.
Atomic weight
Molecular weight Cl
2
Density (liquid)
Density (gas)
1 litre of liquid chlorine at 0 °C
1 kg of liquid chlorine at 0 °C
Specific gravity
Boiling point
Melting point
Evaporation heat
Heat conductivity
Degree of purity according to
DIN 19607
TLV (Threshold Limit Value)
Pressure [bar]
20
16
12
8
4
0
-50 -30 -10 0
Fig. 7 Vapour pressure curve of chlorine
Solution [g/l]
14
10
6
2
0
10 30
Fig. 8 Solubility of chlorine gas in water
35.457 u
70.941 u
3
1.57 g/cm at -34.05 °C
3.214 g/l at 0 °C, 1 bar
is equivalent to 457 litres
3
(0.457 m ) of chlorine gas
is equivalent to 311 litres
3
(0.311 m ) of chlorine gas
2.486
(specific gravity of air: 1)
-34.05 °C (1 bar)
-101.5 °C
269 kJ/kg (at 0 °C)
2
0.527 kJ/m h (liquid chlorine)
99.5 %
3
1.5 mg/m (0.5 ppmv)
10 30 50 70
Temperature [°C]
50 70 90
Temperature [°C]

4. Design and function

4.1 Description of the device

2
3
2
6
Fig. 9 Components of the compact dosing unit
Pos. Description
Inlet valve with pressure connection for fixing the
1
VGB-103 compact dosing unit to the chlorine cylinder.
2 Measuring glass for indication of the dosing flow
3 Adjustment knob for setting the dosing flow
4 Connection for the vacuum line (to the injector)
Connection for the overpressure line (to the adsorption
5
filter)
6 Empty signal: red mark
The rate valve is not a perfectly closing shut-off
valve. Do not try to stop the chlorine gas dosing
system by closing the rate valve!
Caution
Switching off the chlorine gas dosing system, see
section 7.5.3 Switching off while the system is
running
4.1.1 Empty signal
The red mark (6) on the vacuum regulator is the empty indication.
It indicates that the residual pressure in the chlorine container is
too low, or the chlorine container valve is closed. When the
chlorine quantity is sufficient, the green mark is visible.
The empty indication works only when the regulator
Note
is in operation.
When the container is emptied, a residual pressure of approx.
2 bar remains. The container is not completely evacuated.
Corrosion and soiling due to the penetration of humidity in the
event of container exchange is thus prevented.

4.1.2 Pressure gauge

The pressure gauge indicates the gas pressure at the inlet valve
(admission pressure). The pressure gauge is optionally available
with limit contact for setting a minimum admission pressure, e.g.
for monitoring from a control room.
4.1.3 Liquid trap
The liquid trap prevents liquefied gas from penetrating the
vacuum regulator. The temperature is automatically adjusted to
approx. 60 °C.
1
VGB-103
5
4
11