Vortex Flowmeter
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Manufacturer: SMC(USA)
Model: ALVT Series
Introduction:
Vortex flow sensing technology relies on measuring the number of vortex pulses generated by a bluff body immersed in the flow stream. The SMC ALVT Vortex flow meter uses dual sensor technology, producing two independent vortex signals which allows for signal amplification and common mode noise reduction. Our sensors never touch the process fluid; the crystal sensors are bonded behind a stainless steel wall. The electronics pick up the slightest pressure pulsations generated by the vortices through the stainless steel wall. This design allows meters to have an extremely wide turndown while maintaining an almost unlimited upper end and a high pressure rating.
The ALVT is available in both insertion and in-line configurations and comes standard with a number of features that are not availble on competitve products. Our sensor is the thinnest wafer vortex on the market. The meter body bolt lengths are shorter to allow for better flange alignment and tighter, leak-free installations. Our insertion models are uniquely designed so as to prevent miss-alignment of the bluff body in the flow stream; a common problem with many other brands of insertion vortex meters. These advanced features, combined with its low cost, are why the ALVT offers superior value versus other vortex meters found in the marketplace.
Features:
- No moving parts, high reliability and durability
- Convenient installation and maintenance
- Sensors do not come in contact with the fluid media, promotes stable performance and long life
- Output pulse signal is proportional to flow rate, high accuracy and no zero drift
- Wide measuring range, turn-down ratio of 20:1
- Low pressure loss, low cost
- Frequency output not affected by changes in the fluid's physical characteristics and composition; meter factor (K) is purely determined by the shape and dimensions of the bluff body. There is no need to compensate for volume flowrate, or to re-calibrate the meter if damaged parts need be exchanged.
- Suitable for a wide variety of applications with steam, gas, and liquid medias.
Technical Data:
| Process Connections |
flanged(standard),Insertion(fixed and adjustable type), Wafer style |
| Process temperature |
-30~662 °F (-35~ 350 ℃) (without LCD display)
23~480 °F (-5~+250℃) (with LCD display) |
| Operating pressure |
230 psi (1.6MPa) standard; up to 930 psi custom |
| Velocity Range |
Depends on fluid, pressure and temperature:
Liquids: ≤ 0~40 feet/sec (0~12m/s)
Gas: ≤ 11.5 fps (3.5m/s)
Steam: ≤230 fps (70m/s) |
| Accuracy |
1.0% for liquid, 1.5% for gas, 2.5% for insertion type |
| Repeatability |
0.33% for liquid, 0.5% for gas, 0.83% for insertion |
| Turn down ratio |
10:1 |
| Material |
SS304 (housing) , CS (standard flange) |
| Signal output |
Pulse output, 2-wire 4~20mADC, RS485, Hart, ModBus |
| RAM Back-up |
Lithium Battery, 3.6VDC |
|
|
| Housing protection |
IP65; IP67; IP68 |
| Ex-protection |
Exid ⅡB T4; Exib ⅡC T 4 |
| Cable |
32' (10 m) free for remote version |
| Weight |
Wafer: 22~28 lbs (10 ~ 13kg) to 12" (DN300)
Insertion: 33 lbs (15 Kg) |
| Signal Interface |
RS232 & RS485, HART |
| Display units |
m3/h |
| Power supply |
110/220 VAC or isolated 14~36 VDC |
| Data storage |
EPROM storage up to 5 years |
|
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