Signal detection via the measuring screwSignal detection via the measuring screwIn the case of signal acquisition via the measuring screw, the screw edge is detected by an impulse transmitter. Two edges per screw revolution are detected, which causes two impulses per screw revolution. Because a screw revolution conveys the exact volume of the measurement chamber, two impulses per measurement chamber volume are generated. This type of signal detection is an affordable solution for all conventional consumption and flow measurement applications.

KRAL Flowmeters OMP Series.

Robust solution for flow measurement of diesel and heavy fuel oil.

The OMP series flowmeters are designed specifically for fuel consumption measurement for marine applications as well as others, and can be used in booster modules and burners.

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Flowmeters and Display and Processing Unit Technique de mesure du débit CCS Certificate of Type Approval DNV-GL Type Approval Certificate

A perfect combination of precision and robustness: Due to the precise measurement chamber volume, a broad range of measurements with a precision rate of 0.1 % can be achieved. Pipe bends and T-sections have no influence on the measurement accuracy or performance of the KRAL flow meter.

The extreme robustness is achieved by the spheroidal graphite iron housing, which provides optimal protection for the precisely manufactured screws. The screws of KRAL flowmeters quickly follow the changes of the fuel flow rate, the fuel pulses and may even change its flow direction briefly.

The measurement devices run with low friction, gentle and with minimal pressure loss. Long lifespan, resistance to pulsations in the media, and efficiency across the entire product life cycle are just a few of the benefits that KRAL flowmeter OMP offers.

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Your benefits.

KRAL flow meter suitable for Marine diesel oil (MDO), Marine gas oil (MGO), Heavy fuel oil (HFO) and further types of oil.
High accuracy flow measurement of fuel flow and oil flow.
Very robust and long life time meter.
Low friction and minimal loss of pressure.
Stabilization zones unnecessary.
Easy installation.
Suitable for harsh industrial conditions.

Technical data.

Media: Chemically neutral, lubricating, clean, non-abrasive, diesel and heavy fuel oil.
Flow direction detection: Second sensor range optional.
Temperature measurement: Additional sensor optional.
Sensor: PNP or Namur signal.
Process fittings: DIN, ANSI, thread. Further connections upon request.

Materials.

Housing: Spheroidal graphite iron.
Screws: Nitrided steel.
Bearings: Hybrid ball bearings.
Sealing: FKM, other seal materials upon request.

Technical data.

Technical data		OMP-13	OMP-20	OMP-32	OMP-52
Nominal diameter	DN [mm]	15	20	25/32	40
	DN [inch]	1/2	3/4	1	1 1/2
Total length with DIN flange	[mm]	115	125	180/190	240
Weight with DIN flange	[kg]	4	5	11/13	19
Flow rate I/h	Q_max	900	2,700	9,000	31,500
	Q_nom	600	1,800	6,000	21,000
	Q_min	6	18	60	210
Flow rate I/min	Q_max	15	45	150	525
	Q_nom	10	30	100	350
	Q_min	0.1	0.3	1.0	3.5
Max. pressure	[bar]	40	40	40	40
Temperature	[°C]	-20 to +200	-20 to +200	-20 to +200	-20 to +200
Viscosity	[mm²/s]	1 to 1x10⁶	1 to 1x10⁶	1 to 1x10⁶	1 to 1x10⁶
Precision	of measurement value	±0.1 %	±0.1 %	±0.1 %	±0.1 %
Repeatability		±0.01 %	±0.01 %	±0.01 %	±0.01 %
K-factor	K [P/I]	1,214.0	321.0	78.0	17.73
Frequency	f at Q_nom [Hz]	202	161	130	104

Sensor.

Sensor		BEG 45C with BEV 13	BEG 47G	BEG 56A
Application		High pressures, wide temperature range	Ex-range	Standard
K-factor		K1	K1	K1
Signal		PNP	Namur	PNP
Temperature	[°C]	-40 to +250	-25 to +100	-40 to +125
Max. pressure	[bar]	420	40	40

Operating instructions.