Variable area
ALVAMT variable area flowmeters are rugged, all-metal flowmeters offering an accuracy of 1%. The ALVAMT is constructed with stainless steel components for measuring a variety of gases and liquids. The ALVAMT can be constructed with various lining materials for aggressive liquid and gas applications. Flow rate indication is provided by means of magnetic coupling where a magnet, encapsulated in the float, is coupled to a rotatable magnet located in the rear of the indicator, thus moving the dial indicator mounted on the meter. Optional accessories available include a microprocessor-based transmitter with 4-20 mA output with or without HART configurable alarms, and pulse output for totalization. Also available are various mechanical indicators - see below.
FEATURES
- Versatile construction for a variety of gas & liquid applications
- Fast response time and high resolution within 5 to 50 msec
- Wide temperature range from -40 up to +400 °C
- Pressures up to 6100 psi (420 bars)
- Pipe connections including flanged, threaded, Tri-Clamp
- Electronics either intrinsically safe EEx ia II CT5, or Ex proof EEx d II CT6
- Available with exotic materials such as Hastelloy B & C,Ti, Cu, Al
- PTFE and other liners available
- NIST traceable calibration
Technical Specifications of Variable area
| Size: | 1/2"~10" (15 ~ 250mm) |
|---|---|
| Measuring Range | Water (20 °C) 10~300000L/h |
| Air (20 °C, 0.1013MPa) 0.7 ~ 3.000 m3/h | |
| Temperature | Mechanical counter -80 up to +400 °C |
| Electronic transmitter -40 up to +250 °C | |
| Pressure | 1/2"~2" (DN15 ~ DN50) 580 psig (4.0 MPa) |
| 2"~10" (DN65 ~ DN250) 232 psig (1.6 MPa) | |
| Process Connections | ANSI, DN & JIS flanges |
| threaded and sanitary | |
| Turndown ratio | 10:1 |
| Accuracy | Mechanical counter 1.5 % FS |
| Electronic transmitter 1.0% FS | |
| Viscosity | 1/2" (DN15) <30 mPa.s, 1" (DN25)<250 mPa.s |
| 21/2"~10" (DN50-250)<300 mPa.s | |
| Metering tube | SS# 304/316/316L, WNR 1.4401/1.4404 |
| 6Mo, Monel, Hastelloy B & C, Titanium | |
| SS# 304 with PTFE lining | |
| Hazardous approvals | Ex ia II CT5 Ex d II CT6 |
| Protection | IP65/NEMA 4X |
| Ambient temperature | Mechanical counter -40 up to 120 °C |
| Electronic transmitter -40 up to 60 °C | |
| Cable interface | M20 × 1.5, 1/2”G, 1/2”NPT, 3/4”G, 3/4”NPT |