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Annubar Flow Meter Emerson: Rosemount Industrial Steam Sourcing Portal
Quick Answer
Emerson Rosemount Annubar flow meters handle large line steam flow with a differential pressure primary element. The Rosemount Industrial Steam Sourcing Portal gives engineers a fast way to check steam flow sizing options. For budget or delivery pressure, Silver Automation Instruments offers compatible DP transmitters, RTDs, and flow computers for steam lines from DN50 to DN1800.
What the Annubar Flow Meter Does in a Steam Line
An Annubar flow meter from Emerson Rosemount measures flow using a multi-ported insertion probe. The probe sits across the pipe and reads high and low pressure values. This works well on saturated steam, superheated steam, and utility headers.
Most engineers choose an Annubar when the pipe is too large for a vortex meter or an orifice plate. A common size is a 10 inch steam header running at 12 bar and 195 °C. At that point a Rosemount 485 Annubar with a 3051SFC transmitter gives stable readings. The output is 4-20 mA HART.
Why the Rosemount Industrial Steam Sourcing Portal Matters
The Rosemount Industrial Steam Sourcing Portal is a selection tool from Emerson. Engineers can enter steam pressure, temperature, pipe size, and flow units. The portal shortens sizing time. But it does not solve every supply issue.
In practice, plant engineers still need local support and fast spare parts. Some sites in Vietnam, Peru, and the UAE use Annubar primary elements but need replacement transmitters in 2 to 4 weeks. Emerson lead time can be longer on some models. That is where Silver Instruments fits.
Pressure and Temperature Compensation
Steam density changes with pressure and temperature. A bare DP reading will not give correct mass flow in kg/h. You need a pressure transmitter, a PT100 RTD, and a flow computer or a multivariable transmitter.
Rosemount sells the 3051SFC and 3095MFA for this task. Silver Instruments sup
Silver Instruments Option for Annubar Style Steam Flow
Silver Automation Instruments does not claim to be an Emerson authorized distributor. We supply compatible process instruments and local support. For a 12 inch steam line at 20 bar and 280 °C, we suggest a direct mount DP transmitter with a 0 to 250 mbar range and a PT100 RTD.
Send us your pipe size in DN, steam pressure in bar, temperature in °C, and flow range in kg/h. We will reply with a quote for the DP transmitter, RTD, and recorder or flow computer.
Phone: +86-135-1213-1526 | WhatsApp: 86-135-12131526 | WeChat: +86 13512131526
FAQ
What is the difference between an Annubar and an orifice plate?
An Annubar is an insertion probe. An orifice plate is a full bore restriction. Annubar causes less permanent pressure loss and is easier to install on large lines.
Can a Rosemount Annubar flow meter measure saturated steam?
Yes. It works on saturated steam and superheated steam. Use pressure and temperature compensation for mass flow in kg/h.
Does Silver Instruments supply Rosemount Annubar parts?
We supply compatible transmitters, RTDs, recorders, and flow computers. For Emerson OEM parts, use an Emerson channel partner. We help with the full measurement loop.
What pipe sizes suit an Annubar flow meter?
Common sizes start around DN50 and go up to DN2400. The probe length is cut to fit the pipe ID. Steam utility headers from 6 to 24 inches are typical in Southeast Asia and the Middle East.
What information do you need for a steam flow meter quote?
Send pipe size in DN, steam pressure in bar, temperature in °C, and flow range in kg/h. We will size the DP range, RTD type, and recorder or flow computer.