KROHNE OPTIMASS with MFC 300 EN - Manual (Page 56)

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7.8 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 and they will be clearly identified. The 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 it is safe to do so.
Burst Disc Meters (up to size 25 only)
OPTIMASS 7000 meters that have been ordered with a burst (rupture) disc will be suppled with
the disc fitted. The disc failure pressure is 20bar @ 20°C.
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 the 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.
7.9 Technical Data
Maximum Flow Rates
Minimum flow rate
Depending on measuring error required.
Tube materials:
• Titanium Gr. 9 • Hastelloy C22 • UNS 31803. • Tantalum alloy RO5255.
The meter size has a prefix T, H, or S indicating the tube material.
Materials of construction:
• Flanges: SS 316 / 316L dual certified
• Spigots and outer cylinder: SS 304 / SS 304L optional SS 316 / SS 316 L dual certified
• Optional 100 bar secondary containment SS 316/L
• Front end housing and post: SS 316L
• Converter housing/junction box: Epoxy coated aluminium or stainless steel.
Dimensions (Flanged versions)
Size 06 10 15 25 40 50 80
Kg/h 1230 3500 14600 44800 12000 234000 560,000
Lbs/min 45 129 536 1,646 4,409 8,598 20,577