VA40 Variable Area Flow Meter

The VA40 is a glass tube variable area flow meter (VA meter), or rotameter, for flow measurement of liquids and gases. This all-purpose flow meter is suitable for all basic municipal water and wastewater applications up to 212˚F (100˚C) as well as a maximum of 10 bar (145 psi). Typical applications include flow measurement of flushing, purging, or inert gases in addition to heating and cooling water.

• simple flow indicator that does not require a power supply
• allows visual product check such as color, free from bubbles, etc.
• suitable for use with either liquids and gases
• analog measuring signal for recording and control purposes
• flange options: DN15 to DN50 (0.5 to 2″)
• NPT, G, hygienic connections, etc.

The VA40 variable area flow meter, from KROHNE, operates without auxiliary power supply. Furthermore, the measuring cone, protected by a metal sleeve with a viewing glass, makes it easy to directly read the flow and observe the medium. Moreover, this VA meter can also be equipped with two optional limit switches (MIN/MAX) or analog output (4-20 mA). The VA40 comes with multiple process connections options and is suitable for use in hazardous areas.

Features of the VA40 Variable Area Flow Meter

• simple and also low-cost flow measuring principle without auxiliary power
• for direct reading of flow and observation of the medium
• optional MIN/MAX flow switches (SIL 2 conformity according to IEC 61508-2) as well as 4-20 mA for recording and control
• full scale value for liquids:  0.1 to 2,650 GPH (0.4 to 10,000 l/h)
• full scale value for gases: 0.25 to 11,000 SCFH (7 to 310,000 l/h)
• maximum measuring error: ±1% (according to VDI/VDE 3513-2) or ±1% of full scale
• turndown ratio 10:1
• ATEX approval for use in hazardous areas
• suitable for use in Safety Instrumented Systems with SIL 2, in redundant design (1oo2), also in SIL 3 applications (type A device)
• available with FDA compliant materials for potable and drinking water

Common Uses of the VA40 VA Meter

• heating water in addition to cooling water
• gas flow measurement
• demineralized as well as ultra-pure water
• water monitoring in auxiliary circuits
• purge and rinse processes