Proline Promass Q 300
46
Hauser
Flange JIS B2220
0
10
20
30
40
50
60
70
0
200
400
600
800
1200
[bar]
[psi]
0
80
160
240
320
400
[°C]
[°F]
200
150
100
50
0
-50
-200
-320
-80
63K
40K
10K
20K
A0029639-EN
21
With flange material 1.4404 (F316/F316L)
Secondary containment
The sensor housing is filled with helium and protects the electronics and mechanics inside.
The following secondary containment pressure ratings/burst pressures are only valid for standard
devices and/or devices equipped with closed purge connections (never opened/as delivered).
If a device fitted with purge connections (order code for "Sensor option", option
CH
"Purge
connection") is connected to the purge system, the maximum nominal pressure is determined by the
purge system itself or by the device, depending on which component has the lower nominal pressure
classification.
If the device is fitted with a rupture disk (order code for "Sensor option", option
CA
"Rupture disk"), the
rupture disk trigger pressure is decisive for the maximum nominal pressure → 47.
The secondary containment burst pressure refers to a typical internal pressure achieved prior to
mechanical failure of the secondary containment as determined during type testing. The
corresponding type test declaration can be ordered with the device (order code for "Additional
Approval", option
LN
"Type test containment").
DN
Secondary containment
pressure rating
(designed with a safety factor
≥ 4)
Secondary containment burst pressure
[mm]
[in]
[bar]
[psi]
[bar]
[psi]
25
1
40
580
290
4
205
50
2
40
580
160
2
320
80
3
25
362
150
2
175
100
4
25
362
120
1
740
If a measuring tube fails (e.g. due to process characteristics like corrosive or abrasive fluids), the
fluid will be contained by the secondary containment.
If there is a need to drain the leaking medium into a discharge device, the sensor should be fitted
with a rupture disk. Connect the discharge to the additional threaded connection → 58.
If the sensor is to be purged with gas (gas detection), it should be equipped with purge connections.
Do not open the purge connections unless the secondary containment can be filled immediately
with a dry, inert gas. Use only low pressure to purge. Maximum pressure: 5 bar (72.5 psi).
In case of a tube failure, the pressure level inside the secondary containment will rise according to
the operating process pressure. If the user judges that the secondary containment pressure rating/
burst pressure does not provide an adequate safety margin, the device can be fitted with a rupture
disk. This will prevent extensive pressure buildup inside the secondary containment and is strongly
recommended in high pressure gas applications, especially where the process pressure is higher than
the secondary containment burst pressure.
