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Endress Hauser Prowirl Vortex Flow Meter: Multivariable Steam and Gas Measurement
Quick Answer: The Endress Hauser Prowirl series covers steam mass flow, gas standard volume flow, and liquid volume flow with one multivariable vortex meter. For saturated steam the Prowirl F 200 and Prowirl D 200 can calculate mass flow in kg/h without an external pressure transmitter. Silver Instruments offers a direct alternative for DN15 to DN300 lines with 4-20 mA HART output and a lower lead time for industrial users in Southeast Asia, the Middle East, and Australia.
Prowirl Series Overview
The Prowirl series from Endress Hauser includes the F 200, D 200, O 200, and R 200 models. Line sizes run from DN15 to DN300 for wafer and flanged process connections. The multivariable version has an integrated PT100 temperature sensor and an onboard flow computer. This computer calculates steam mass flow or gas standard volume flow in real time. Power supply is standard 24 V DC two wire loop. Outputs include 4-20 mA HART, pulse, and status. Accuracy for steam mass flow is around 1.0 percent of reading when the Reynolds number stays above 20 000. Gas standard volume flow accuracy is around 1.4 percent of reading. These values come from public data sheets and from our own comparisons on customer sites.
Steam Mass Flow Measurement in Practice
Saturated steam lines operate at different pressures depending on the process. A chemical plant in Vietnam runs a 6 inch header at 12 bar and 190 °C. The plant used a differential pressure setup for five years. Flow readings drifted during low load periods. The maintenance team replaced that setup with a Prowirl F 200 multivariable meter. The meter now sends kg/h directly to the DCS via 4-20 mA HART. Commissioning took about four hours. For saturated steam the internal temperature sensor gives the density reference. No external pressure transmitter is required. For superheated steam you need a pressure transmitter with a 4-20 mA signal because temperature alone cannot define the density. The Prowirl accepts that input directly. Most engineers skip the pressure compensation part during first sizing. But steam density changes fast with pressure, so the multivariable meter saves time and reduces pipe penetrations.
Gas Flow Measurement and Pressure Compensation
Gas is more sensitive to pressure and temperature changes than liquid. Natural gas, compressed air, and nitrogen all need pressure compensation to get standard volume flow. The Prowirl series can take a pressure transmitter input and run a real gas correction. For natural gas the transmitter can use the AGA8 method. The meter measures operating volume flow and temperature at the bluff body. A food packaging site in Saudi Arabia uses a Prowirl D 200 on a 3 inch compressed air line at 7 bar and 25 °C. The meter sends a pulse output to a paperless recorder and a 4-20 mA HART signal to the building management system. That site allocates air consumption
Silver Instruments Vortex Flow Meter Alternative
Silver Instruments supplies a multivariable vortex flow meter for similar applications. The meter body is 316L stainless steel and the bluff body is welded in place. The electronics include a local display, a 4-20 mA HART output, and Modbus RTU. Line sizes cover DN15 to DN300. The unit measures steam mass flow, gas standard volume flow, and liquid volume flow. Accuracy is 1.0 percent of reading for steam and 1.5 percent for gas. Each meter ships with a 5 point calibration report and a 24 month warranty. Lead time from our factory to Australia, Vietnam, Thailand, or Dubai is usually 10 to 14 days. We have seen many food and beverage plants in the Middle East and chemical distributors in Latin America ask for a lower cost replacement for the Prowirl series. They need a reliable meter with local support and a clear calibration certificate. Our vortex meter is not a copy of the Endress Hauser device. It is a separate design with the same process fit and output options.
To get a quote, send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. Call Silver Automation Instruments at Tel: +86-25-68650347. You can also send a WhatsApp message to +86-25-52155837 or use WeChat: +86 15365082610. Our team answers technical questions in English within one business day.
FAQ: Five Key Questions
Q: Can the Prowirl F 200 measure saturated steam mass flow without an external pressure transmitter?
A: Yes. For saturated steam the internal PT100 temperature sensor and the stored steam table are enough. The meter calculates mass flow in kg/h directly.
Q: What line sizes are available in the Prowirl series?
A: The standard line size range is DN15 to DN300. Wafer and flanged process connections are available depending on the model and the pressure rating.
Q: Does the multivariable version work for superheated steam?
A: Yes. You need an external pressure transmitter with a 4-20 mA signal. The meter accepts that input and uses it with the internal temperature to calculate mass flow.
Q: How does the Prowirl series handle natural gas standard volume flow?
A: The meter takes a pressure transmitter input and uses the AGA8 method for natural gas. It outputs standard volume flow or mass flow depending on the configuration.
Q: What is the typical accuracy for steam and gas?
A: Steam mass flow accuracy is about 1.0 percent of reading. Gas standard volume flow accuracy is around 1.4 percent of reading for a Reynolds number above 20 000.
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