- August 24, 2018
- FCI - Fluid Components International
August 23, 2018— FCI’s ST75 Series Air/Gas Flow Meter is now suitable for measurement in gas dosing and gas injection in small line batch and continuous processes. The ST75 Series Air/Gas Flow Meter from Fluid Components International (FCI) is the a flow measurement solution.
The ST75 Flow Meter features a solid-state thermal dispersion mass flow sensing element with platinum RTD’s in equal mass thermowells for years of service. It measures virtually any gas or gas mixture. It can be calibrated to measure gases over a flow range from 0.04 to 559 SCFM (0.07 to 950 NCMH), depending on line size, which is useful in low-flow applications requiring small doses.
For variable demand cycles due to small batch or other continuous process production requirements, the ST75 Flow Meter is factory preset to 100:1 turndowns. It features accuracy to ±1% of reading with ±0.5% repeatability in line sizes from 0.25 to 2 inches (6 to 51 mm).
The design of the ST75 Flow Meter’s flow element features no-moving parts. This design provides process safety.
The Model ST75 Series Flow Meters are designed with a choice of mounting configurations. They feature a full digital display and are also available with optional transmitter remote mounting capabilities for hazardous plant environments. The remote transmitter can be mounted up to 100 feet (30 meters) away from its thermal mass flow sensor in piping or ductwork and connected via two 0.50-inch FNPT or M conduit connections.
For tube service in a 0.25 inch line, the ST75 Flow Meter’s round transmitter is 3.28 inches (83 mm) wide and stands 5.7 (144,8 mm) above the centerline of the flow tube. Its footprint makes it simpler to add measuring points where close control of the process is desirable, such as in gas dosing and gas injection applications.
Where crowded equipment layouts exist, the Model ST75AV Meter features a built-in Vortab flow conditioner. Nearby pumps and valves that affect the accuracy of other meter technologies are no problem with the ST75 Meter’s built-in Vortab Flow Conditioners, which create a regular smooth flow profile in the pipe for dependable flow measurement.
The ST75 Flow Meter’s scalable dual 4-20mA standard outputs are user assignable to flow rate and/or temperature and a 0-1kHz pulse output of total flow. Two-way HART bus communications are available with the Models ST75A and ST75AV. The instrument can be ordered for input power with either 18 to 36 Vdc or 85 to 265 Vac
The ST75 Flow Meter withstands process temperatures from 0 to 250°F (-18 to 121°C). It operates at pressures up to 240 psig [16.5 bar (g)] with a standard t-fitting (NPT female) process connection. With a tube process connection, the meter withstands 600 psig [41 bar (g)].
The ST75 Series electronics are housed in IP67 rated enclosure with dual conduit ports in either NPT or M20 threading. The models ST75A and ST75AV include HART as well as NAMUR compliant 4-20 mA outputs and SIL compliance rating. The complete instrument carries global Ex agency approvals for Division l/Zone 1 installations.
Fluid Components International is a global company committed to meeting the needs of its customers through innovative solutions for the most challenging requirements for sensing, and measuring flow, pressure and temperature of gases.