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Dwyer VA25437 | Variable Area Glass Flowmeter | Glass float, 18.39 SCFH air, 3.32 GPH water
Dwyer VA25437: a glass variable area flowmeter with a glass float, rated for 18.39 SCFH (8678 ml/min) air or 3.32 GPH (209 ml/min) of water. Use the VA25437 for metering carrier gases, indicating process flow and level, or measuring liquids and gases in laboratories and pilot plants.
- ±2% FS accuracy at 21.1°C and 1 atm absolute, ±0.25% FS repeatability for the VA25437
- Correlation charts with air and water calibration data accompany the VA25437 universal mm scale
- VA25437 valve: 6-turn needle as standard, 16-turn high precision valve optional
- Vertical mounting with two 1/8" female NPT ports on the VA25437; leak rate 1 x 10⁻⁷ sccs helium
- Panel-mount ready; an optional acrylic tripod base lets the VA25437 stand on a bench
- Specifications
- Features
- Downloads
| Part Number | VA25437 |
| Brand | Dwyer |
| Type | Variable area glass flowmeter |
| Flow rate (air) | 18.39 SCFH (8678 ml/min) |
| Flow rate (water) | 3.32 GPH (209 ml/min) |
| Float | Glass |
| Flowtube | Borosilicate glass |
| Accuracy | ±2% FS @ 70°F (21.1°C), 14.7 psia |
| Repeatability | ±0.25% FS |
| Connection | Two 1/8" female NPT |
| Scale | Universal 65 mm or 150 mm with correlation charts |
| Valve | 6-turn needle (standard); 16-turn high precision optional |
| Turn-down Ratio | 10:1 |
| Mounting | Vertical |
- Time is saved with a permanently fused ceramic scale with a vertical locator line that lessens parallax and eye strain.
- Long operational life and a magnifying lens to improve reading resolution are features of the robust polycarbonate front cover, which also protects the tube from breaking.
- For flow rate control, a standard 6-turn needle valve replaces the requirement for an additional valve, saving money.
- With the optional acrylic tripod base that enables self-standing bench mounting, no extra installation is needed.
- For extremely low flow rates, great sensitivity control and resolution are possible with high precision metering valves including non-rising stems.
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