KROHNE OPTIMASS with MFC 300 EN - Manual (Page 32)

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5.8 Purge Port Meters and Burst Disc Meters
Purge Port Options
If the purge port option was selected at time of order, then your meter will be fitted with ½”
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. If it is suspected that the
primary tube has failed, depressurise and remove the meter from service, as soon as it is safe
to do so.
Burst Disc meters
OPTIMASS 2000 meters that have been ordered with a burst (rupture) disc will be suppled with
the disc fitted. The disc failure pressure is 20barg @ 20°C.
Meters fitted with connection ratings in excess of 100 barg,(1450 psig) will be supplied with a
burst disc fitted.
Important:
The burst disc 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 regard-
ing suitability of disc fitted.
If the product is in any way hazardous, it is strongly recommended that an exhaust tube is con-
nected to the NPT male thread of the burst disc 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 disc is pointing away from meter
5.9 Technical Data
Maximum Flow Rates
100 150 250
Kg/h 420,000 900,000 2,300,000
Lbs/min 14,698 33,804 84,510
Minimum Flow Rates
Kg/h Dependant on measuring error required
Lbs/min Dependant on measuring error required
Weights (PN40 Flanges)
100 150 250
kg lbs kg lbs kg lbs
Compact with aluminium MFC 300 84.8 187 211.5 466 444.5 980
Compact with SS MFC 300 90.1 198 216.8 478 449.8 991
Remote with aluminium J box 80.8 178 207.8 457 440.5 971
Remote with SS J box 81.7 180 208.4 459 441.4 973
Cooling
Please consult KROHNE if cooling medium is to be used in the heating jacket.