Authentic Endress+Hauser Prowirl R 200 (7R2C / 7R2B) Reduced Bore Vortex Flowmeter for precise low-flow steam, gas, and liquid measurement. Features built-in 1 or 2 line-size reduction to eliminate field piping modifications and reducer costs.
The Endress+Hauser Prowirl R 200 (7R2B / 7R2C) is designed for utility engineers and procurement specialists who need accurate low-flow steam, gas, or liquid measurement without cutting field pipelines or installing external pipe reducers. It is ideal for retrofitting oversized steam headers, low-velocity gas lines, and energy management systems requiring SIL 2/3 safety compliance.
Technical Assistance & Quick Sizing: Replacing an existing unit or need exact model code verification? Explore our Prowirl 200 F/D/R/O Selection Guide or submit your line parameters for a guaranteed 24-hour factory quotation.
Traditional low-flow installations require cutting existing pipes, welding concentric reducers, and performing non-destructive testing (NDT). Prowirl R 200 integrates a 1-step or 2-step inner diameter reduction directly into its standard flange-to-flange body, cutting installation costs while fitting directly into the existing pipeline geometry.
Low process velocities often cause standard vortex meters to lose signal or cut off entirely. The internal venturi reduction inside Prowirl R 200 increases fluid velocity at the capacitive DSC sensor, maintaining linear measurement stability down to Reynolds number Re = 10,000.
For steam energy accounting, Prowirl R 200 combines optional integrated pressure and temperature sensors to perform dynamic mass flow calculations within the transmitter. This eliminates the expense of external flow computers and separate impulse piping runs.
Constructed with 1.4408 (CF3M) stainless steel and capacitive DSC sensors, Prowirl R 200 meets NACE MR0175/MR0103 sour gas standards and SIL 2/3 functional safety requirements according to IEC 61508 for hazardous process environments.
The following parameters define the operating conditions and measurement capabilities for Prowirl R 200 (7R2B and 7R2C series):
| Technical Parameter | Specification Limits / Detailed Options |
|---|---|
| Measuring Principle | Vortex Shedding with capacitive DSC sensor (drift-free, vibration-resistant) |
| Mating Line Sizes | DN 25 to DN 250 (1" to 10") |
| Internal Reduction Options | R-type: 1 line-size reduction (e.g., DN 50 pipe with DN 40 sensor) S-type: 2 line-size reductions (e.g., DN 50 pipe with DN 25 sensor) |
| Volume Flow Accuracy | Liquids: ±0.75% of reading Steam & Gases: ±1.00% of reading |
| Mass Flow Accuracy (Steam/Gas) | ±1.50% (with integrated temp & pressure compensation) ±1.70% (saturated steam with temperature compensation only) |
| Mass Flow Accuracy (Liquid) | ±0.85% of reading |
| Linearity Threshold | Stable vortex signal down to Reynolds number Re = 10,000 |
| Maximum Pressure Rating | PN 40, ASME Class 300, JIS 20K |
| Process Medium Temperature | Standard: -40 to +260 °C (-40 to +500 °F) High/Low Temp Option: -200 to +400 °C (-328 to +752 °F) Extended Range (On Request): -200 to +450 °C (-328 to +842 °F) |
| Wetted Materials | Measuring Tube: 1.4408 (CF3M) Stainless Steel DSC Sensor: 1.4404 / 316L / Alloy C22 Process Connections: 1.4404 (F316 / F316L) |
| Communication Protocols | 4-20 mA HART (passive), PROFIBUS PA, FOUNDATION Fieldbus |
| Certificates & Approvals | SIL 2/3 (IEC 61508), ATEX, IECEx, cCSAus, EAC, 3.1 Material Traceability, NACE MR0175/MR0103 |
Understanding when to select an integrated reduced-bore body versus a standard full-bore meter prevents unnecessary piping expenses:
| Evaluation Factor | Prowirl R 200 (Integrated Reduction) | Prowirl F 200 (Full-Bore Meter) |
|---|---|---|
| Low-Flow Sensitivity | High: Internal reduction accelerates fluid velocity, capturing low flow rates without signal loss. | Standard: Requires higher baseline fluid velocity to generate measurable vortices. |
| Installation & Piping Costs | Lowest Total Cost: No external pipe reducers, extra welds, or NDT testing required. | Higher Field Cost: Requires welded concentric pipe reducers when fitted on low-flow lines. |
| Face-to-Face Dimension | Matches standard pipe sizes, allowing direct inline replacement without custom spools. | Standard full-bore face-to-face dimensions. |
| Pressure Drop | Slightly higher permanent pressure loss due to internal venturi constriction. | Minimal pressure drop across the meter body. |
| Low-End Accuracy | Maintains calibrated accuracy down to Re = 10,000. | Accuracy drops off near lower cutoff limits. |
Q: What is the main advantage of the integrated line reduction in Prowirl R 200?
A: The integrated 1 or 2 line-size reduction increases process fluid velocity inside the meter body, enabling accurate low-flow measurement without requiring field pipe cutting or external reducers.
Q: Can the Prowirl R 200 calculate steam mass flow directly?
A: Yes, with integrated temperature and pressure sensors, Prowirl R 200 automatically calculates dynamic saturated and superheated steam mass flow with accuracy up to ±1.5%.
Q: What material certificates and safety approvals are available?
A: It provides 3.1 material traceability certificates, NACE MR0175/MR0103 sour gas compliance, SIL 2/3 functional safety (IEC 61508), and hazardous area approvals including ATEX, IECEx, and cCSAus.
Avoid ordering errors and line downtime. Send us your process temperature, pressure, and flow ranges, or upload a photo of your existing unit nameplate. Our technical team will verify your model code and deliver a competitive price quote within 24 hours.
