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Dwyer VA25435 | Variable Area Glass Flowmeter | Glass float, 8.07 SCFH air, 1.34 GPH water
With a glass float and a range reaching 8.07 SCFH (3807 ml/min) on air or 1.34 GPH (84.3 ml/min) of water, the Dwyer VA25435 is a glass-tube variable area flowmeter. Typical duties for the VA25435 are carrier-gas metering, process flow and level indication, and lab or pilot-plant measurement of liquids and gases.
- Accuracy of the VA25435: ±2% FS (70°F, 14.7 psia); repeatability ±0.25% FS; 10:1 turn-down
- VA25435 comes with a universal mm scale plus correlation charts for water and air
- VA25435 flow control: 6-turn needle valve; high precision valve sold separately
- VA25435 connections: two 1/8" female NPT; mount vertically
- Delivered ready for panel mounting; convert the VA25435 to a bench unit with the optional acrylic tripod base
- Specifications
- Features
- Downloads
| Part Number | VA25435 |
| Brand | Dwyer |
| Type | Variable area glass flowmeter |
| Flow rate (air) | 8.07 SCFH (3807 ml/min) |
| Flow rate (water) | 1.34 GPH (84.3 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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