Samplers

Automatic collection of representative liquid samples

Samplers

In-line Autosampler – AAM

The In-Line Autosampler – AAM is a robust and highly reliable solution developed for the automatic collection of representative liquid samples in fiscal measurement processes, custody transfer, appropriation measurement and other purposes that require highly representative samples of liquids for composition and quality analysis. Designed to operate in severe process conditions, the system allows installation without interruption of operation, ensuring safety, accuracy and operational continuity.

Developed to comply with strict international sampling standards (ISO 3171, ASTM D 4177 and API 8.2), the system ensures that the physical and chemical properties of the fluid are preserved with full fidelity for laboratory analysis.

Discover our advantages

Benefits

High durability and low maintenance cost

It features a long Mean Time Between Failures (MTBF of 12,000 hours, equivalent to 2.2 million samples) due to robust PCTFE and PEEK seals.

Representativeness and regulatory compliance

It ensures the collection of homogeneous and representative samples of crude oil and refined hydrocarbons, strictly complying with ISO 3171, ASTM D 4177 and API 8.2 standards.

Installation without process interruption

It allows installation and adjustment in pressurized lines, eliminating the need for plant downtime and increasing operational availability.

Through electrical or pneumatic actuation, the piston-type manifold head captures precise sample volumes (1cc or 2cc grabs) at a frequency of up to 60 samples per minute for short transfers. The self-compensating sealing system eliminates the need for external relief valves in operations up to 1,500 PSI. The entire mechanical structure (stem, flange, body and actuator) is manufactured from high-strength materials, making it a robust solution for offshore platforms, offloading lines, storage terminals and polyducts.

 

DIFFERENCES BETWEEN SERIES AND MODELS:

Metroval offers four main models of samplers to suit different flow rates, pipe diameters and installation layouts:

  • ASM-MI01 (Manual Insertion): Sampling probe with manual insertion mechanism, adjustable for various pipe diameters. Allows installation in pressurized process sockets (up to 3 kgf/cm²) via a shut-off valve, without interrupting the flow.
  • ASM-AI01 (Automatic Insertion): Sampling probe with integrated automatic insertion mechanism. Designed for safe insertion and retraction in lines with high process pressure (pressurized to up to 210 kgf/cm²).
  • ASM-HF01 (Reinforced for High Flow): Structurally reinforced sampling probe, designed to be immune to severe vibrations in process lines with extremely high flow rates, such as platform ship offloading (FPSO) operations.
  • ASM-FL01 (Fast Loop / By-pass): Automatic sampling cell type sampler designed specifically for installation in bypass lines (by-pass or fast loop), ideal for smaller diameter pipes (1″ to 3″).

 

STORAGE AND INSTRUMENTATION SYSTEMS (OPTIONAL)

To ensure the integrity, safety, and continuous monitoring of collected samples, Metroval offers a full line of accessories, advanced instrumentation, and storage systems that complement the AAM Series:

  • Level Instrumentation:
    • Level Switches: Prevent overflow of reservoirs by sending automatic alarms to the control system when the capacity limit is reached.
    • Level Transmitters and Local Indicators: Allow continuous visual and electronic monitoring of the accumulated volume in real time, facilitating the planning of laboratory collection routines.
  • Homogenization and Circulation Systems: Available in built-in or remote configurations (with dedicated recirculation pumps), they keep the sample perfectly mixed and homogeneous within the reservoir, avoiding the decantation of water and sediment prior to laboratory analysis.
  • Air-Conditioned and Protected Cabinets: Robust cabinets made of GRP or Stainless Steel, equipped with internal heating systems to preserve the temperature of the fluid and prevent freezing or phase separation in environments with extreme climatic conditions.

 

CUSTOMIZATION ENGINEERING: TAILOR-MADE SOLUTIONS

At Metroval, we understand that each process plant has unique challenges in layout, floor space, fluid properties, and regulatory requirements. Therefore, the AAM Series is not just a standardized product, but a fully customizable modular platform.

Our expert engineering team designs and manufactures complete sampling systems (sampling skids ) tailored specifically for your application:

  • Special Materials: Manufacture of probes and wetted parts in special metal alloys (such as Duplex, Super Duplex, Hastelloy or Monel) and compliance with specific standards (NACE MR0175/ISO 15156) for compatibility with highly corrosive fluids or presence of H2S.
  • Dual Reservoir Systems: Configurations with redundant reservoirs and 3-way automatic selector valves, allowing continuous collection on long transfers or segregation of samples by different customer batches.
  • Reinforced Anti-Vibration Probes: Custom structural sizing for applications with extremely high flow velocities, ensuring the mechanical integrity of the probe against resonance and turbulence effects.

The main applications where this type of equipment is essential include:

  • Offloading operations on FPSOs: Collection of representative samples during the transfer of crude oil, ensuring accuracy in the determination of water and sediment content (BS&W).
  • Transportation Terminals and Polypipelines: Continuous monitoring of the quality and composition of refined hydrocarbons and crude oil transported by land or sea pipelines.
  • Fiscal Measurement and Production Appropriation: Collection of samples for auditing and compliance with regulatory agencies (ANP/INMETRO), ensuring tax accuracy and production sharing.
  • Quality Control in Refineries: Automatic sampling at the inlet of crude oil to predict refining efficiency and identify corrosive contaminants prior to processing.

 

  • In-line Autosampler - AAM

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