KRAL OMG-020.XXBABX.0069 Flowmeter

KRAL OMG-020.XXBABX.0069 Positive Displacement Flowmeter (40 Bar, 3/4″ / DN20)

The KRAL OMG-020.XXBABX.0069 is a positive displacement screw spindle flowmeter engineered specifically for precision liquid measurement in high-demand marine, power generation, and process engineering environments. Operating on the continuous volumetric displacement principle, the meter utilizes two precision-machined, nitrided steel spindles housed inside a cast iron measuring chamber. Liquid passing through the meter rotates the spindles without slippage or pulsation, isolating exact fluid volumes per revolution.

Designed to handle low-viscosity distillates through extreme-viscosity residual fuels without flow profile distortion, the OMG-020 delivers a standard measuring accuracy of ±0.1% of the actual measured value over a 10:1 turn-down ratio, with a repeatability of ±0.01%. It requires zero straight upstream or downstream pipe runs, making it an ideal drop-in unit for tight marine booster modules, fuel conditioning skids, and engine test cells.

Model Details

• Manufacturer: KRAL GmbH (Austria)
• Model Series: Volumeter® OMG Series
• Full Order Code / MPN: OMG-020.XXBABX.0069
• Nominal Diameter: DN 20 (3/4″ Flanged / Threaded Interface)
• Nominal Pressure Rating: PN40 (40 bar / 580 psi)
• Year of Manufacture: 2024 (Factory Fresh / Unused)
• Condition: Brand New – Open Box

Key Features

1. High Measurement Accuracy: Delivers ±0.1% accuracy of current measured value with ±0.01% repeatability across dynamic flow rates from 0.3 to 45 L/min (18 to 2,700 L/h).
2. Zero Straight Run Requirement: Spindle profile and volumetric displacement design eliminate sensitivity to flow velocity profiles; installs directly upstream or downstream of pipe bends, tees, and valves without flow conditioners.
3. Extreme Fluid & Viscosity Versatility: Operates reliably from 1 to 1,000,000 mm²/s, accommodating Ultra-Low Sulfur Marine Gas Oil (ULS-MGO), Marine Diesel Oil (MDO), Heavy Fuel Oil (HFO / VLSFO), lubricants, and hydraulic fluids.
4. Directional Dual-Pulse Detection: Integrated high-resolution inductive pick-up sensor provides dual-channel phase-shifted pulse outputs for flow rate calculation, totalization, and bi-directional flow detection.

Compatible Engine Platforms

Marine Main & Auxiliary Engines:

• MAN Energy Solutions: L16/24, L21/31, L23/30H, L27/38, L28/32H auxiliary diesel generator fuel rail monitoring.
• Wärtsilä: W20, W26, W32, W34DF, Vasa 32 auxiliary/main fuel feed lines.
• Caterpillar / MaK: M20C, M25C, M32C, CAT 3500 series, CAT C280 series.
• Daihatsu & Yanmar: DK-20, DK-26, DK-28, DE-18, EY-18, EY-26 fuel delivery blocks.

Fuel Treatment & Booster Modules:

• Alfa Laval (FCM, PureFuel systems)
• Auramarine (Fuel and gas oil supply units)
• KANGRIM, Mitsubishi Heavy Industries, and Hanshin fuel boosters

KRAL Electronic Processing & Display Units:

• KRAL BEM 300 / BEM 500 electronic flow computers
• KRAL BEM 700 differential flow calculation units
• KRAL SmartMaster emission & consumption telemetry modules

Applications

• Differential Fuel Consumption Measurement: Inflow and return fuel rate calculation on main/auxiliary engines to verify IMO DCS and EU MRV carbon compliance.
• Marine Boiler & Incinerator Monitoring: Measuring thermal consumption on auxiliary oil-fired boilers and exhaust economizer auxiliary burners.
• Engine Test Beds & Dynamometers: Factory-acceptance and R&D dynamometer testing of low- and mid-speed diesel/dual-fuel internal combustion engines.
• Lube Oil Circulation & Dosing: Continuous monitoring of cylinder oil lubrication rates and hydraulic supply lines.
• Polyurethane & Chemical Processing: Precision metering of polyols and isocyanates in high-pressure metering machines.

Part Number Cross-References & Equivalent Codes

• OEM Part Number: OMG-020.XXBABX.0069
• Series Reference: OMG 20 / OMG-020 / OMG20-PN40
• Alternative Sensor / Configuration Suffixes:
  • OMG-020.010033
  • OMG-020.010069
  • OMG-020.AA0001
  • KRAL Volumeter OMG 020 DN20-PN40

Frequently Asked Questions

Does the KRAL OMG-020 require straight piping before and after the meter?

No. Because the KRAL OMG-020 operates on a positive displacement screw principle, fluid enters individual measuring pockets without relying on dynamic fluid velocity profiles. It can be bolted directly adjacent to elbows, valves, and manifold blocks without any loss in calibration accuracy.

Can this meter handle low-sulfur MGO without lubricating additives?

Yes. The hybrid ceramic ball bearings and nitrided spindle surfaces are designed to run continuously on low-viscosity fuels (down to 1.0 mm²/s) without galling, provided particulate filtration is maintained.

How is the K-factor entered into our vessel’s automation system?

Each KRAL flowmeter is delivered with an individual calibration protocol stating its exact pulses per liter (approx. 321 P/L for OMG-020). Input this exact scalar into your PLC or flow computer. For highest accuracy across wide flow turns, input the 5-point linearized table provided on the calibration sheet.

Is the OMG-020 field-serviceable onboard?

Yes. The sensor cartridge and hybrid bearings can be inspected or replaced using standard marine engineer hand tools without removing the meter casing from the pipeline, minimizing downtime during dry-docking or port calls.