Forbes Marshall - Trusted Partners in Steam Engineering & Control Instrumentation
Forbes Marshall - Trusted Partners in Steam Engineering & Control Instrumentation
This is a product of Krohne Marshall. Krohne Marshall's range of products is available for India and Indian subcontinent only. Krohne Marshall is a joint venture between Forbes Marshall, India and Krohne, Germany.

VA45

The VA45 Variable Area Flowmeter is a glass tube variable area (VA) flowmeter engineered specifically for low-pressure gas applications operating at pressures under 1 barg / 14.5 psig. Featuring a borosilicate glass measuring tube with an easy-to-read scale, the device enables direct reading of gas flow rates while allowing operators to visually inspect the medium.

Designed to handle operating temperatures up to +100°C / +212°F, the VA45 provides a cost-effective, durable measurement solution across flexible mounting setups, including flanged, threaded, and hose process connections.

Key Applications of VA45:

  • Furnaces & Forges: Air and gas supply metering for industrial ovens, heating systems, forges, and heat-treatment equipment.
  • Protective Gas Dosing: Precision flow control and dosing of shielding or protective gases in manufacturing processes.
  • OEM & Machinery Construction: Gas line monitoring in packaged burner systems and OEM plant apparatus.
  • Visual Glass Tube Design: Equipped with a borosilicate glass measuring tube and clear scale for direct flow reading and visual monitoring of the gas medium.
  • Low-Pressure Gas Optimization: Specially designed for low-pressure gas lines operating at pressures up to 1 barg / 14.5 psig.
  • Zero Auxiliary Power: Operates strictly on a mechanical variable area float principle, requiring no electrical power supply.
  • Wide Measurement Range: Supports full-scale gas flow values from 2,300 to 75,000 l/h (85 to 2,790 SCFH) with a 10:1 turndown ratio.
  • High Measurement Accuracy: Delivers accurate readings with a maximum error of ±2.5% (according to VDI/VDE 3513-2) or ±2% of full scale.
  • Versatile Process Connections: Fits diverse piping systems with EN (DN15…40) and ASME (½…1½”) flanges, female threads (G½-G1½, ½-1½ NPT), or hose connections (DN15, DN25, DN40).
  • Adaptable Material Options: Process connections available in 316L austenitic stainless steel, PVDF, or chromised steel, with gasket options in EPDM, FFKM, FPM, or NBR.
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