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『Foxboro Vortex Flow Meter 84F Specifications: Flanged and Wafer High-Performance Gas Sensors』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
Foxboro Vortex Flow Meter 84F Specifications for Flanged and Wafer High-Performance Gas Sensors
Quick Answer
The Foxboro 84F vortex flow meter covers gas, steam, and low viscosity liquid service in DN15 to DN300 line sizes. It comes in flanged and wafer bodies with 4-20 mA HART output, pulse totalization, and ATEX Zone 1 certification. Silver Automation Instruments can cross reference this model for replacement or supply a similar flanged or wafer gas flow meter.
Model Overview
The 84F belongs to the Foxboro 84 series vortex flow meter family. Flanged versions fit ANSI 150, 300, and 600 flanges plus DIN PN16, PN40, and PN100. Wafer versions fit between mating flanges and weigh less. That wafer option is common on gas skids where space is tight. In practice, most engineers choose flanged for DN80 and larger lines and wafer for DN15 to DN50 fuel gas branches.
Key Specification Ranges
Standard line sizes run from DN15 to DN300. The wetted material is 316L stainless steel as standard. Hastelloy C276 is available for sour gas, wet CO2, and chloride service. Process temperature limits for the standard transmitter are -40 °C to 240 °C. Maximum pressure depends on flange class and line size. On smaller flanged models, pressure can reach 100 bar.
For gas, the accuracy is normally ±1.5% of rate. For liquid, accuracy is ±0.75% of rate. Repeatability is around ±0.2%. Turndown in gas service is 20:1. The signal output is a 4-20 mA HART loop. A pulse output handles flow totalization. Loop power is 24 V DC. Local indication and configuration are available as options.
Flanged vs Wafer Selection
The flanged 84F is easier to align on larger pipes and handles higher loads in vibration areas. The wafer 84F installs between existing flanges and reduces installed weight. Last year a customer in Vietnam asked us for a flanged DN50 replacement on a natural gas line with 40 bar pressure. The existing body was flanged DIN PN40. We matched the face-to-face length and flange rating without changing the pipework.
High Performance Gas Measurement Details
Vortex gas meters do not need moving parts. A bluff body inside the pipe creates a shedding frequency. A piezoelectric sensor reads the frequency and the transmitter converts it to flow. The 84F sensor is isolated from the process fluid. Here is the thing, wet or dirty gas can still reduce sensor life. A separator, strainer, or filter is still a good practice upstream.
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Oil and gas terminals in Southeast Asia specify these meters for fuel gas and flare line measurement. Chemical plants in the Middle East use them for nitrogen blanketing. Water and wastewater plants use vortex meters for digester gas. Food and beverage sites use them for CO2 and compressed air. Marine service uses flanged 316L bodies for engine room gas monitoring.
Compressed air systems in Southeast Asia often use wafer 84F style meters on DN40 and DN50 lines. Natural gas skids in the Middle East use flanged meters from DN80 to DN150 at 20 to 40 bar. CO2 distribution in Australia runs at lower pressure but needs 316L wetted parts. Steam injection lines in Africa also use the same vortex body with a different flow computer setup.
Silver Automation Instruments Replacement Options
Silver Automation Instruments is a flow meter manufacturer and supplier in Nanjing, China. We offer flanged and wafer vortex flow meters that match many Foxboro 84F specifications. Our range includes 316L stainless steel bodies, Hastelloy C options, 4-20 mA HART, pulse output, and ATEX Zone 1 approvals. Tell us your gas type, flow range, pressure bar, temperature °C, pipe size DN, and flange standard. We will confirm the correct model and price.
FAQ: Foxboro 84F Gas Flow Meter
Can the 84F measure gas mass flow directly?
No. The 84F measures volumetric flow. For gas mass flow, you need pressure and temperature compensation from the transmitter or a flow computer.
What line sizes does the 84F cover?
Standard sizes are DN15 through DN300. Flanged and wafer body styles are available across this range, but the maximum pressure rating changes with size and material.
How much straight pipe does the 84F need for gas?
Allow at least 15 pipe diameters upstream and 5 pipe diameters downstream. Control valves, elbows, and reducers require additional upstream straight run.
Can Silver Automation Instruments replace an existing 84F without pipe modifications?
Often yes. Send us the tag plate data, flange standard, face-to-face length, and flow range. We check the dimensional cross reference against our vortex meter line.
What information do you need for a quote?
Send gas type, flow range in kg/h or m3/h, pressure bar, temperature °C, pipe size DN, flange standard, and hazardous area requirement. Contact Silver Automation Instruments at Tel: +86-25-68650347, Whatsapp: +86-25-52155837, WeChat: +86 15365082610.