Custody Transfer Turbine Flow Meter

The Custody Transfer Turbine Flow Meter has been engineered for measuring commercial and fiscal purposes, as it needs to provide accurate volume measurements. This flow meter measures flow rates based on the detection of turbine rotor rotation.

The low pressure loss characteristic of this device along with its linear performance makes it a viable flow meter for custody transfer transactions of petroleum products, fuels, chemicals, and low viscosity fluids.

This type of flow meter is used extensively at pipelines, terminals, storage facilities, loading facilities, and process plants.

• High-accuracy turbine flow meter designed for custody transfer applications.
• Suitable for measuring crude oil, diesel, and refined petroleum products.
• Provides excellent repeatability for fiscal and commercial transactions.
• Lower cost compared to many other custody transfer flow measurement technologies.
• Integrated electronic module with turbine rotor and pickup coil.
• Supports real-time transaction printing with date, time, flow rate, and totalized flow (printer option).
• Ideal for pipeline metering stations, tanker loading/unloading, storage terminals, and allocation metering.
• NABL traceable calibration with optional NACE MR0175 compliance.

• Fluid: Crude Oil, Diesel & Refined Petroleum Products
• Flow Range: Up to 1000 m³/hr
• Fluid Type: Clean, Low-Viscosity Liquids
• Application: Custody Transfer / Fiscal Metering
• Traceability: NABL Traceable

Precision Fluid Conditioning

The high-value liquid or gas enters the inline measurement body from the pipeline. To meet the strict accuracy demands of a Custody Transfer Turbine Flow Meter, the fluid first passes through an internal flow straightener that removes unwanted swirl and turbulence, ensuring a perfectly uniform velocity profile.

Kinetic Energy Transfer

The conditioned stream flows across a multi-bladed rotor suspended freely within the path. As the fluid collides with the rotor blades, its kinetic energy forces the wheel to spin. Because the rotor features a low-inertia, high-precision bearing design, its rotational speed changes in direct proportion to the volume of fluid passing through.

Magnetic Pulse Extraction

As the rotor spins, the metallic tips of the blades pass beneath an external pickup coil mounted on the outer wall of the Custody Transfer Flow Meter instrument. Each passing blade interrupts the localized magnetic field, generating a small, distinct electrical pulse without any physical contact or frictional drag.

High-Resolution Pulse Count

An integrated preamplifier conditions these tiny raw pulses into clean digital square waves. The total number of pulses counted over a specific period relates directly to the total volume throughput, providing the high-resolution repeatability required by standard Custody transfer flow instrument suppliers.

Fiscal Telemetry and Billing Output

The microelectronics convert the pulse frequency into standardized billing data, factoring in real-time temperature and pressure variables. The device then transmits this secured data directly to a flow computer or PLC to provide absolute transparency during commercial ownership changes.

Size Configurations & Flow Design

• Flow Performance Span: Measuring flow capacities scaled up to 1000 M³/Hr.

Material Options

• Body Construction Metallurgy: SS304, SS316
• Material Compliance Upgrades: Optional NACE compliance certified to MR0175 standards.

End Connections

• Process Flanged Options: Built to match standard ASA, DIN, or BIS dimensional ratings.

Operating Parameters & Performance Limits

• System Measurement Accuracy: Linearity rated at ±0.15% of reading or better.
• System Measurement Repeatability: ±0.02% (calculated at a 95% confidence level).
• Measurement Certification & Traceability: NABL traceable tracking calibration.

Electrical Options & Interface Systems

• System Programming Method: Configuration adjusted via an integrated membrane key interface.
• Power Supply Input Options: 24 VDC Isolated, 230 VAC, 110 VAC main line utility selections.
• Transaction Recording Accessories: Integrated transaction printer module supplying an imprinted track record using an alpha/numeric format thermal or dot-matrix printer unit to stamp real-time flow data, dates, and totalized accumulations.

Measurement of Volumes: The Custody Transfer Turbine Flow Meter is engineered to ensure an exact and repeatable measurement of volumes of refined fuel and other low-viscosity liquids during their transfer on a commercial basis.

Consistent Performance throughout the Operational Period: Constructed using high-quality parts, the meter provides consistent performance and ensures measurement stability for a prolonged time period.

Integration with Other Systems: The meter may be equipped with the standard interfaces allowing its connection to a PLC, SCADA, or flow computer system.

Use in Custody Transfer Applications: The meter is used in pipes, terminals, loading stations, and storage facilities.