Rosemount 3051CF DP Flow Meter
Overview
The Rosemount 3051CF is Emerson’s integrated differential pressure flow meter built on the Rosemount 3051C coplanar transmitter. According to the product data sheet, Rosemount 3051CF flow meters combine the proven 3051C pressure transmitter and the latest primary element technology, and they reach up to 1.75 percent volumetric flow accuracy at 8:1 turndown. They are available with 4 to 20 mA HART, WirelessHART and FOUNDATION Fieldbus protocols, offer ten-year stability, and are SIL 3 capable under IEC 61508 for safety instrumented systems when applied with the required redundancy.
As a supplier of Rosemount products in Oman and the GCC, Seven Star LLC supplies the Rosemount 3051CF DP Flow Meter with the Rosemount 3051CF datasheet and regional sizing support. Plants in Muscat, Sohar and Salalah receive a flow meter built to the actual pipe inner diameter, wall thickness and process data of the line.
Flow Measurement Principle
Every differential pressure flow meter relies on a primary element that creates a pressure drop proportional to the square of the flow rate. The Rosemount 3051CF pairs that element with the 3051C transmitter, which senses the differential pressure and calculates flow. The 3051CFA Annubar uses a T-shaped averaging pitot tube that samples the velocity profile across the pipe, the 3051CFC uses a compact orifice plate with an optional conditioning design, and the 3051CFP uses an integral orifice plate between precision honed pipe sections. Integral thermowells on the compact and integral styles allow temperature measurement without another pipe penetration.
The element dictates the accuracy. The data sheet lists ±1.80 percent of flow rate for the 3051CFA at 8:1 turndown, ±1.75 percent for the 3051CFC conditioning orifice with beta 0.4 and ±1.95 percent at beta 0.50 to 0.65, and ±1.75 percent for the 3051CFP with a bore between 0.500 and 1.000 inch. Total transmitter performance on ranges 2 to 5 is ±0.14 percent of span and long-term stability is ±0.2 percent of upper range limit for ten years. The Rosemount 3051CF response time is 85 to 100 ms on HART, with an update rate of 22 times per second.
Engineering Design of the Rosemount 3051CF
The 3051CFA Annubar is available for line sizes from 2 to 96 inches (50 to 2400 mm), with carbon steel, 316 stainless steel and chrome-moly mounting materials and horizontal or vertical piping orientations. The conditioning compact orifice reduces straight pipe to two diameters upstream and downstream from most flow disturbances and lowers installation cost against a traditional orifice and flange set. The integral orifice improves accuracy and repeatability in ½ inch, 1 inch and 1½ inch lines, using a self-centering plate that removes installation errors that are magnified in small lines.
The transmitter side offers Bluetooth configuration, a back-lit graphical display with local-language capability, a flow rate screen with totalizer, Loop Integrity and Plugged Impulse Line diagnostics through option code DA1, and safety certification with proof testing. The transmitter and primary element are assembled, leak tested and configured in the factory, and a newly shipped unit carries a QR asset tag that links to its serialized documentation. The compact orifice version qualifies against vibration standard IEC 61298-3 provided the transmitter assembly stays below 9 lb (4.08 kg).
Key Features
The Rosemount 3051CF turns a pressure transmitter into a complete, ready-to-install flow measurement. The features below are drawn from the official data sheet.
- Combines the 3051C transmitter with Annubar, compact orifice or integral orifice primary elements in a single assembly.
- Delivers up to 1.75 percent of flow rate accuracy at 8:1 turndown, with the Annubar version at 1.80 percent.
- Arrives fully assembled, configured and leak tested for out-of-the-box installation.
- Cuts straight pipe requirements to two diameters with the conditioning orifice, and minimizes permanent pressure loss with Annubar.
- Provides 4 to 20 mA HART, WirelessHART and FOUNDATION Fieldbus protocols with ten-year stability.
- Offers Loop Integrity and Plugged Impulse Line diagnostics, Bluetooth and a flow-specific display screen.
- Supports liquid, gas and steam service with fluid type chosen in the model code.
- Is SIL 3 capable per IEC 61508 with redundant use, and SIL 2 capable for single use.
Industrial Applications
The Rosemount 3051CF serves liquid, gas and steam flow measurement where a differential pressure solution is preferred for its simplicity and wide application base. Typical examples are steam headers, fuel gas and flare lines, cooling water, boiler feedwater, compressed air and process gas distribution. The Annubar versions suit large pipes where an orifice plate would be impractical, the compact conditioning orifice suits tight skids and the integral orifice suits low flow chemical dosing and sample lines. In Oman these applications arise in power and desalination plants, refineries, LNG and gas facilities and industrial zones around Sohar and Salalah.
In Oman and the GCC, Seven Star LLC supplies the Rosemount 3051CF to operators, EPC contractors and maintenance teams across Oman and the wider GCC. For alternative flow technologies, compare the Rosemount 8800D vortex flowmeter, the Rosemount 8700 magnetic flowmeter and the Rosemount 3051 Coplanar pressure transmitter that forms the heart of each assembly.
Technical Specifications
The table lists published Rosemount 3051CF specifications from the Emerson DP flow meters product data sheet dated March 2025.
| Parameter | Specification |
|---|---|
| Model | Rosemount 3051CF (3051CFA Annubar, 3051CFC compact orifice, 3051CFP integral orifice) |
| Fluid types | Liquid, gas, steam |
| 3051CFA line sizes | 2 to 96 inch (50 to 2400 mm) |
| 3051CFP line sizes | ½, 1 and 1½ inch |
| Flow accuracy | Up to ±1.75% of flow rate at 8:1 turndown; 3051CFA ±1.80% |
| Total performance (3051C) | ±0.14% of span (ranges 2 to 5) |
| Long-term stability | ±0.2% of URL for 10 years |
| Response time | 85 to 100 ms (HART); 152 ms (Fieldbus); 22 updates per second |
| Output protocols | 4–20 mA HART, WirelessHART, FOUNDATION Fieldbus |
| Straight pipe (conditioning orifice) | Two diameters upstream and downstream from most disturbances |
| Safety | SIL 3 capable per IEC 61508 (redundant use) |
| Vibration effect | Less than ±0.1% of URL (IEC 60770-1) |
Request a Quote for Rosemount 3051CF
Request a formal quotation for the Rosemount 3051CF DP Flow Meter from Seven Star LLC. Send us the fluid, line size and schedule, flow range, operating pressure and temperature, preferred primary element and approvals, and our instrumentation division will size the meter and return a valid model code with lead time. We can share the Rosemount 3051CF datasheet and confirm availability and lead time. In Oman and the GCC, Seven Star LLC supplies flow meters on request with the local technical support that keep critical flow points accurate.
- Datasheet Emerson Rosemount DP Flow Meters and Primary Elements Product Data Sheet 00813-0100-4485, Rev JG (covers 3051CF), March 2025 Download
Rosemount product families on this page
Pressure includes the 3051 in its variants (3051T in-line, 3051L for liquid level, 3051CF DP flowmeter and the 3051SMV MultiVariable transmitter), the 2051 and 1199 diaphragm seal systems. Level instruments are the 3300 guided wave radar, the 5408 non-contacting radar and the 2120 vibrating fork switch. Temperature is covered by the 248 and 644 head mount transmitters and the 848T high density transmitter for multiple sensor inputs. The 8800D vortex flowmeter and the 702 wireless discrete transmitter are also listed, along with liquid analysis sensors.Where Rosemount instruments are used
These are standard instruments in oil and gas production, refining, petrochemical, power and water plants. Typical duties are line and vessel pressure, differential pressure flow across orifice plates, tank and separator level and interface, and temperature measurement on pipes, reactors and rotating equipment.Ordering Rosemount transmitters: what we need
Send the complete model string and the serial number from the nameplate; a photo is ideal. Every character of the string selects something: range, output, materials of the isolating diaphragm and flange, process connection, housing, approval and options. If you are specifying a new point, give the measured variable and span, process fluid, pressure and temperature, connection, output (4-20 mA HART, FOUNDATION Fieldbus or wireless), display and hazardous area approval. For remote seals add flange size, rating and capillary length.Browse Rosemount products by category: Pressure Instrumentation, Temperature Instrumentation, Level Transmitter, Liquid Analysis Sensors, Flowmeters.
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