Liquid Controls PD Diesel Flowmeters Saudi Arabia | AMAC

Why LC rotary positive displacement for diesel?

The M-Series mechanically partitions liquid into measured volumes, using a blocking rotor and two displacement rotors in a synchronized assembly. This can be suitable for petroleum loading and delivery systems, particularly where repeatability, refined-fuel compatibility and an appropriate volumetric register matter. Final accuracy depends on the particular model, flow range, meter factor, calibration/proving practice, installed components and operating liquid.

LC meters are sometimes called “LC PD”, “Liquid Controls positive displacement”, “M-Series”, “rotary-vane/rotary PD” informally by buyers. For exact replacements, quote the nameplate series and entire model string rather than relying on “LC meter 2 inch” alone.

Common LC M-Series identifiers

A complete diesel transfer/loading metering package

• Meter assembly and matching connections, with fluid-class-appropriate construction, seals and bearings.
• Strainer/filter upstream to prevent abrasive damage; air/vapor eliminator to avoid false volume when air enters suction or loading lines.
• Pulse output and register/totalizer where needed; consider LCR-family or other specified display/control integration without assuming every legacy part is compatible.
• Temperature compensation, density and API reference conditions where the commercial requirement calls for corrected volumes.
• Upstream pressure/flow control, check and isolation valves, pressure protection and hazardous-area electrical compliance.
• Defined calibration/proving procedure, sealability and legal metrology documents where the job is for custody transfer.

Meter selection versus turbine or Coriolis

LC PD: attractive for correctly engineered petroleum transfer and batch measurement. Liquid turbine: often considered for clean, low-viscosity diesel where pressure drop, line conditions and stable viscosity permit good meter-factor performance. Coriolis: can measure mass flow and density directly, subject to line size, pressure loss, cost and suitability. Select by the process and accounting basis, not nominal accuracy alone.

Important operational exclusions and data

Do not use an LC part number from another fuel class without checking wetted material compatibility. Air pockets, flashing, filtration bypass, worn seals and absence of proper proving can undermine metering. A manufacturer may offer custody-transfer-capable configurations, but local compliance, type approvals and calibration records are a project requirement—not an automatic guarantee for every meter.

For replacement needs, send existing meter photographs, serial number, register type, calibration factor, drawings and whether only the meter body or the full skid is required.

What to include in your enquiry

• LC meter OEM code, serial number, meter class, existing register and size
• Diesel grade and viscosity, operating temperature, suction/delivery configuration
• Min/normal/peak flow (L/min or m³/h), pressure and hazardous-area classification
• Accuracy/calibration, custody transfer and certified-proving requirements
• Required skid scope: strainer, air eliminator, pulses, display, valves, printer and integration
• Quantity, project technical spec and Saudi delivery/site address

Related technical resources

Diesel flowmeter overview · Turbine comparison · Flowmeter technology guide · Fuel tanker telemetry