KROHNE OPTIMASS with MFC 05x EN User Manual
Page 36
Installation and Operating Instructions OPTIMASS
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1.4.8 Purge Port Meters and Burst Disk Meters
Purge Port Options
If the purge port option was selected at time of order, then your meter will be fitted with 1/4" NPT female
connections – these will be clearly identified. These connections are sealed with NPT plugs and PTFE tape.
Important:
Do not remove these plugs.
The meter is factory sealed with a dry nitrogen gas fill and any ingress of moisture will damage the meter.
The plugs should only be removed to purge the inside of the meter case of any product if it is suspected that
the primary measuring tube has failed. This must only be done after the meter has been depressurised and
removed from service. This should be done as soon as possible after failure is suspected (less than 3 days)
Burst Disk meters
OPTIMASS 8000/9000 meters that have been ordered with a bursting (rupture) disk will be so fitted. This is
fitted when the operating pressure of the measuring tube exceeds the design pressure of the secondary
containment. The disk failure pressure is 20bar @ 20°C.
Important:
The burst disk is suitable for the designed application according to the process conditions and flow rates as
per original order. If conditions alter, consult KROHNE for further advice regarding suitability of disk fitted.
If the product is in any way hazardous, it is strongly recommended that an exhaust tube is connected to the
3/4" NPT male thread of the burst disk so that the discharge can be piped to a safe area. This tube should
be large enough that pressure cannot build up in the meter case.
Ensure arrow on burst disk is pointing away from meter.
1.4.9 Technical Data
Nominal Flow Rates
15
25
40 80 100
Kg/h
2,700 9,000 32,000 85,000 250,000
Lbs/min
100 300 1,200 3,000 9,300
Maximum flow rate
Typically 130 % of the nominal flow rate for the sensor size depending on application.
Minimum flow rate
Depending on measuring error required.
Materials of construction
Measuring Tubes
SS 316L or HC-22
Flanges
SS 316L or
SS316L backing with HC-22 raised face
Outer Casing
SS 304
Converter Mount & Front End electronics
SS 316L
1.4.10 Weights & Dimensions
Weights
Weight of OPTIMASS 8000/9000 sensor fitted with a typical standard flange in kg (lbs)
15 25 40 80 100
Model / Size
kg lbs kg lbs kg lbs kg lbs kg lbs
8000
Sensor
10.9 24 14.4 32 23.4 51.5 61.4 135 89.4 197
9000 Sensor with insulation
housing
14.9 32.8 20.4 44.8 30.9 68 79 174 125 275