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Cone Type Flow Meter: Sourcing V-Cone High-Turndown Differential Pressure Tools
Quick Answer: A V-Cone flow meter is a differential pressure device with a cone shaped restriction inside the pipe. The meter provides high turndown, often 10:1, and short straight pipe requirements. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range to Silver Automation Instruments for a direct manufacturer quote.
How a Cone Type Flow Meter Works
A cone type flow meter has a cone mounted in the center of the pipe. The pipe wall and the cone create an annular flow path. Fluid passes around the cone. The cone shape flattens the velocity profile and reduces turbulence. Differential pressure is measured upstream and downstream of the cone. A DP transmitter converts that signal to flow rate with a 4-20 mA HART output.
Most engineers choose a V-Cone meter when piping space is tight. A standard orifice plate may need 20 to 40 pipe diameters of straight run. A V-Cone often needs 0 to 3 pipe diameters upstream and 0 to 1 pipe diameters downstream. That short straight run helps in skids, offshore platforms, and pump rooms.
V-Cone vs Orifice Plate and Venturi
Orifice plates are cheap but have permanent pressure loss and edge wear. Venturi tubes are accurate but long and expensive. V-Cone flow meters sit in between. They hold calibration well in wet steam, dirty gas, and liquids with small particles. We supplied a DN80 V-Cone meter to a gas distribution site in Malaysia. The customer replaced an orifice plate because the plate edge had worn and the readings drifted. After the swap, the meter ran for two years without recalibration.
High Turndown Benefits for Gas Steam and Liquid
High turndown matters when flow drops at night or during low production. A V-Cone meter can measure down to 10 percent of maximum flow with good accuracy. This helps a biogas plant in Thailand measure gas flow from day to night without changing the meter. You get one meter for a wide range. That saves capital cost and spare parts.
Typical accuracy is ±0.5 percent of reading. Repeatability is ±0.1 percent. Temperature range can go from -20 °C to 400 °C depending on material and DP transmitter. Pressure rating can be PN16, PN40, ANSI 150, ANSI 300, or ANSI 600. This covers most industrial lines.
Key Specifications to Prepare Before You Ask for Price
Suppliers need a few data points. Do not send a generic message like send price for cone flow meter. We need specific details to select the correct cone size and DP transmitter range.
Prepare these values before you contact Silver Instruments:
Pipe size and schedule. Example DN100 SCH40. Fluid type and phase. Example saturated steam, natural gas, or diesel. Flow range with units. Example 500 to 5000 kg/h or 20 to 200 m3/h. Operating pressure in bar or psi. Operating temperature in °C or °F. Process connection. Flange standard ANSI 150, DIN PN16, or wafer. Output and approvals. Example 4-20 mA HART, ATEX Zone 1, or marine type approval.
With this data we can quote within one or two working days. The price depends on pipe size, material, transmitter brand, a
Industry Applications Where We See Repeat Orders
Oil and gas customers use V-Cone meters on produced water, fuel gas, and flare lines. Water and wastewater plants use them on sludge and chemical feed lines. Food and beverage plants use them on steam and hot water. Marine operators use them on bunker fuel and cooling water.
Last year a customer in Vietnam asked for a DN150 V-Cone flow meter on a steam header in a textile plant. The line had only 2 pipe diameters of straight run before the meter. An orifice plate was not an option. The V-Cone meter fit the space and gave stable output across 8:1 turndown.
Another customer in Australia uses a DN65 V-Cone meter on hot water at 150 °C for a district heating loop. The meter has been in service for three years. The only maintenance task is checking the impulse lines every six months.
How to Source a V-Cone Flow Meter Without Overspending
Do not buy a flow meter on size alone. Here is the thing. A DN100 V-Cone meter can have several DP transmitter ranges. A mismatched transmitter loses turndown or clips the output. Check the beta ratio. For high turndown, a beta of 0.45 to 0.75 is common. The supplier should provide a sizing sheet with expected differential pressure at minimum and maximum flow.
Ask for factory calibration. Silver Automation Instruments provides calibration certificates with each meter. We test on water or air depending on the application. For gas service, we can provide a gas calibration report. For liquid service, we calibrate on a water rig. You can also request third party calibration if your plant needs ISO 17025 paperwork.
Delivery time for a standard DN25 to DN300 V-Cone flow meter is about 15 to 20 working days. Larger sizes or special alloys take longer. Confirm the shipping method. We ship by air courier for small meters and by sea freight for DN250 and above. We regularly ship to Southeast Asia, Australia, the Middle East, Latin America, and Africa.
FAQ
What is the smallest V-Cone flow meter size? Silver Instruments supplies from DN15 up to DN1200. Small line sizes suit chemical dosing and pilot plants. Large sizes suit gas transmission and cooling water lines.
Can a V-Cone meter handle wet steam? Yes. The cone shape resists wear and the DP signal remains stable. Please state steam quality and pressure when you ask for a quote.
What output signals are available? Standard output is 4-20 mA with HART. Optional outputs include pulse, Modbus RTU, and Foundation Fieldbus. Tell us your control system type.
Do you supply ATEX or IECEx versions? Yes. We supply ATEX Zone 1 and Zone 2 versions for gas and dust. The DP transmitter and housing can meet international approvals.
How do I get a price quickly? Send your pipe size in DN, fluid, flow range, pressure, temperature, and connection standard to Silver Automation Instruments. Use Tel +86-25-68650347, WhatsApp +86-25-52155837, or WeChat +86 15365082610. You can also visit flow-meter.com.au.
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