Rosemount 8800 Flanged Vortex Flow Meter: Wide 38:1 Turndown for Steam, Liquid & Gas (1/2"-12")
The Rosemount 8800 Flanged Vortex Flow Meter is engineered for chemical processing plants, power generation utility steam lines, and industrial gas distribution where standard meters suffer from low-flow signal dropouts, impulse line clogging, and high permanent pressure losses. Featuring a wide 38:1 turndown ratio and an all-welded, gasket-free body, this meter eliminates fugitive emission leak points and stops steam energy waste during off-peak demand shifts. Line sizes range from 1/2″ to 12″ (DN15 to DN300) with pressure capabilities up to ANSI Class 1500 (PN 160) and temperatures from -330°F to 800°F (-200°C to 427°C).
Eliminating Steam Loss & Maintenance Costs with 8800 Flanged Technology
1. Wide 38:1 Turndown Prevents Uncounted Steam Losses
Standard differential pressure (DP) orifice plates usually offer a limited 4:1 turndown ratio, causing them to miss low-velocity steam flow during night shifts or boiler low-load states. The Rosemount 8800 Flanged Vortex provides a 38:1 dynamic turndown range. It captures small flow rates accurately down to low velocities, helping energy managers account for every pound of steam and preventing unmetered energy loss in plant utility headers.
2. MultiVariable™ Option (MTA/MCA/MPA) Replaces Costly External Hardware
Calculating saturated or superheated steam mass flow traditionally requires an external RTD, a pressure transmitter, a 5-valve manifold, and a flow computer. The 8800 MultiVariable option integrates a temperature sensor directly into the shedder bar or accepts direct pressure inputs via HART®. It calculates real-time mass flow with density correction inside the meter electronics, saving up to $3,500 per installation point in impulse piping and wiring costs.
3. Gasket-Free All-Welded Meter Body Eliminates Leak Points
Traditional vortex meters rely on internal O-rings or gaskets that degrade under thermal cycling, creating hazardous chemical leaks or vacuum leaks. The Rosemount 8800 features a gasket-free, all-welded body construction with no ports or impulse lines to clog. This design withstands thermal shocks up to 800°F (427°C) and prevents fugitive emissions in compliance with stringent EPA environmental standards.
4. Smart Fluid Diagnostics & Mass-Balanced ADSP Vibration Immunity
Heavy piping vibration from nearby compressors often creates false flow pulses in standard flow meters. The 8800 utilizes a mass-balanced sensor coupled with Adaptive Digital Signal Processing (ADSP) to filter out mechanical pipeline noise. Additionally, built-in Smart Fluid Diagnostics automatically detect liquid condensate slugs in steam lines, alerting operators to potential phase changes before water hammer damages downstream piping.
Rosemount 8800 Flanged Vortex Technical Specifications
| Parameter / Metric | Verified Specification Limits | Practical Engineering Benefit |
|---|---|---|
| Volumetric Accuracy | • Liquid Volumetric: ±0.65% of rate • Gas & Steam Volumetric: ±1.0% of rate |
Ensures precise custody transfer and utility billing accuracy |
| MultiVariable Mass Flow Accuracy | • Liquid Mass (MTA/MCA): ±0.70% of mass rate • Steam Mass (MTA/MCA 150 psia): ±1.2% of rate • Steam Mass (MCA 300 psia): ±1.3% of rate • Steam Mass (MCA 800 psia): ±1.6% of rate • Steam Mass (MPA 30-2000 psia): ±1.3% of rate |
Direct mass flow compensation without installing separate flow computers |
| Turndown Ratio | 38:1 dynamic turndown range | Captures low-flow off-peak shifts without dropping pulse signals |
| Line Sizes & Flange Ratings | • Sizes: 1/2″ to 12″ (DN15 to DN300) • ANSI Class 150 to 1500 | DIN PN 10 to PN 160 | JIS 10K to 40K |
Fits standard pipeline dimensions without structural modification |
| Wetted Metallurgy | • Stainless Steel: 316 / 316L and CF3M • Nickel Alloy: Hastelloy C-22 and CW2M • High-Temp Carbon Steel: A105 and WCB • Low-Temp Carbon Steel: LF2 and LCC • Duplex: UNS S32760 and 6A |
Corrosion-resistant choices for aggressive acid or sour gas service |
| Output Protocols | • 4-20 mA with HART® 5 / 7 (optional scalable pulse) • FOUNDATION Fieldbus ITK6 (2 AI, 1 LAS, 1 Integrator, 1 PID) • Modbus RS-485 (device status + 4 variables) |
Seamless integration into Emerson DeltaV, Honeywell Experion, or Yokogawa DCS |
Technology Comparison: Rosemount 8800 Flanged vs. DP Orifice Plate vs. Standard Vortex Meters
| Engineering Criteria | Rosemount 8800 Flanged Vortex | Standard Gasketed Vortex | Traditional DP Orifice Plate |
|---|---|---|---|
| Turndown Range | Wide 38:1 Turndown | 12:1 to 20:1 Turndown | Narrow 4:1 Turndown |
| Leak Potential | Zero Leak Paths (Gasket-free welded body) | High (Internal gaskets degrade over time) | Very High (Impulse tubing, valves, manifold seals) |
| Maintenance Cost | Low (Online isolated sensor swap, zero impulse lines) | Medium (Requires line shutdown for gasket replacement) | High (Frequent impulse line blowdown & heat tracing) |
| Vibration Immunity | High (Mass-balanced sensor + ADSP filter) | Low (Prone to false pulse counts from pipe noise) | N/A (DP cell influenced by impulse line vibration) |
| Permanent Pressure Drop | Low (Single obstruction shedder bar) | Low | High (Permanent energy loss across orifice plate) |
Complementary Flow Instrumentation Options
For high-consequence safety loops requiring 2oo3 voting logic in SIL 3 systems, review the Rosemount 8800 Quad Vortex Flow Meter.
For budget-conscious installations between existing flanges in smaller lines, consider the Rosemount 8800 Wafer Vortex Flow Meter. If low flow velocities require line size reduction without extra pipe reducers, explore the Rosemount 8800 Reducer Vortex Flow Meter.
Frequently Asked Questions: Rosemount 8800 Flanged Vortex Procurement
Q1: Why use the Rosemount 8800 MultiVariable option for steam mass flow measurement?
A1: The 8800 MultiVariable option (MTA/MCA/MPA) integrates built-in temperature compensation or external pressure inputs directly inside the meter body. This eliminates the need for separate RTDs, impulse lines, and flow computers, cutting installation hardware costs by up to 40% while delivering steam accuracy up to ±1.2% at 150 psia.
Q2: How does Smart Fluid Diagnostics protect steam headers from water hammer?
A2: Smart Fluid Diagnostics monitors raw vortex signal frequencies to detect phase changes (such as wet steam or liquid condensate entrainment) in real time. It alerts plant operators before liquid slugs hit turbines or valves, preventing catastrophic water hammer structural damage.
Q3: Can you replace the piezo-electric sensor under full operating pressure?
A3: Yes. The 8800 features a non-wetted sensor isolated from process fluids. Instrument technicians can replace the internal sensor element online without shutting down the pipeline or breaking containment seals.
