The VA45 is a glass tube variable area (VA) flow meter for flow measurement of gases at low operating pressures (<1 barg /<14.5 psig). The device is ideally suited for use in gas supply lines of industrial ovens, forges and furnaces or protective gas and heating systems (with process temperatures up to +100°C / +212°F).
The VA 45 operates without auxiliary power supply. The glass measuring cone, protected by a metal sleeve with a viewing glass, makes it easy to directly read the flow and to observe the medium. The standard version is available with flange, thread or hose connections.
- Simple, low-cost measuring principle without auxiliary power
- For direct reading of the flow and observation of the medium
- Full scale value for gases: 2300…75,000 l/h / 85…2790 SCFH
- Maximum measuring error: ±2.5% (acc. to VDI/VDE 3513-2) or ±2% of full scale
- Turndown ratio: 10:1
General information
| Product type | Flowmeter |
| Product family name | VA |
| Product positioning | For low pressure gas applications |
| Measurement principle | Variable area float |
| Measured media | Gases |
Operating conditions
| Process pressure | max. 1 barg/ 14.50 psig |
| Process temperature | 0…+100°C/ +32…+212°F |
Materials
| Measuring tube | Borosilicate glass |
| Gaskets | Ethylene propylene diene monomer (EPDM), Perfluoroelastomer rubber (FFKM), Fluoroelastomer rubber (FPM), Nitrile butadiene rubber (NBR) |
| Process connection | Austenitic stainless steel (1.4404/316L), Polyvinylidene fluoride (PVDF), Chromised steel |
Process connections
| Flange connections | EN (1092-1): DN15…40 ASME (B 16.5): ½… 1½” |
| Thread connections | Female: G½, G¾, G1, G1½ ½ NPT, ¾ NPT, 1 NPT, 1½ NPT |
| Other connections | Hose: DN15, DN25, DN40 |
Machinery and apparatus (OEM industry)
- Air supply to furnaces etc.
- Dosing of protective gases
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