Seven Star L.L.C

Flow Computers

Flow Computer are electronic instruments capable of flowrate conversion such as scaling, frequency division, F/I conversion by receiving the flow signal from a flowmeter or capable of calculating flowrate and density at the reference temperature and pressure by receiving a signal from thermometer, pressure gauge, and densimeter as well as flowrate from the flowmeter. You can choose a product required for your applications for saturated steam, overheated steam, air, liquid, etc.

We are the leading global supplier of bespoke flow computer metering systems. As an independent systems integrator, knowledge of a variety of flow computer systems is essential.

We have over 8 years of flow computer knowledge shared between all of our staff and specialist engineers. Our expertise and industry knowledge make us a global voice of authority across the oil and gas sector and a trusted support partner.

Frequently Asked Questions

Why are specialized flow computers necessary instead of standard PLCs for custody transfer applications?
Flow computers are engineered with highly accurate analog-to-digital converters and execute complex, industry-standard algorithms (like AGA or API) at rapid intervals. Unlike standard PLCs, they provide immutable audit trails and extreme precision critical for legal and financial custody transfer of hydrocarbons.
How do flow computers compensate for temperature and pressure variations in gas measurement?
These devices continuously ingest real-time data from dynamic temperature and pressure transmitters along the pipeline. They utilize this live telemetry to dynamically calculate the compressibility factor, converting measured volumetric flow into standardized mass or base volume flow rates.
What communication protocols are standard for integrating flow computers into a DCS?
Industrial flow computers predominantly utilize Modbus RTU/TCP, DNP3, or specialized telemetry protocols to ensure secure and deterministic data transmission. This standardization allows seamless integration with both local Human Machine Interfaces (HMIs) and remote SCADA networks.
How do flow computers ensure data integrity and security during power failures?
They are equipped with non-volatile memory and internal battery backups that preserve critical accumulation totals, configuration parameters, and alarm logs. This ensures that no measurement data is lost and the system can resume accurate calculation immediately upon power restoration.
What calibration procedures are required for flow computers in high-accuracy environments?
Calibration involves verifying the precision of the analog input channels using certified reference standards and validating the mathematical algorithms against established physical properties. Routine field proving of the primary meters is also essential to maintain overall system uncertainty within acceptable tolerances.