Dwyer VFLO Series Venturi with Magnehelic® Flow Meter
Flow measurement device combining a Venturi tube with a Magnehelic differential pressure gauge, pipe sizes 1"~4", accuracy ±2.5% FS.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The VFLO Series consists of a progressive Venturi tube and a Magnehelic differential pressure gauge, with low pressure loss and a gauge head that can be rotated to suit vertical or horizontal piping. Pipe sizes cover 1″~4″, accuracy ±2.5% FS, dual-scale display in SCFM and inches of water column, with flow conversion charts supplied.
| Parameter Name | Technical Specifications |
|---|---|
| Main specifications | |
| Medium | Air and non-combustible, compatible gases. (Natural gas available as an option) |
| Wetted materials | Aluminium, silicone, acrylic, polycarbonate, high-carbon steel, low-carbon steel, brass, paper, acrylic paint, enamel paint, alkyd paint, nickel plate, zinc plate, Hercel FC, 300 series stainless steel, PTFE, Loctite AV sealant, commercial black rubber, neoprene, samarium cobalt, nickel alloy steel cover, beryllium copper |
| Housing | Die-cast aluminium housing and bezel, acrylic cover. Exterior surface coated grey to withstand a 168-hour salt spray corrosion test |
| Accuracy | ±2.5% FS. |
| Pressure Resistance | -20" Hg to 15 psig (-0.677 bar to 1.034 bar); MP type: 35 psig (2.41 bar). For total pressure ratings within the application range at high cycle rates, the next higher rating is recommended |
| Overpressure | Relief valve opens at approximately 25 psig (1.72 kPa). |
| Temperature limit | 20~140°F (-6.67~60°C). |
| Size | 4" (101.6 mm) dial diameter. |
| Mounting orientation | Diaphragm in vertical position. Consult factory for other positions |
| Connection | NPT female thread. See selection table. |
| Weight | Gauge: 1 lb 2 oz (510 g), MP & HP 2 lb 2 oz (963 g); Venturi: selection table. |
| Model selection | |
| 2000-40VF1 | 0-10" w.c. & 0-20 SCFM air |
| 2000-40VF2 | 0-10" w.c. & 0-50 SCFM air |
| 2000-40VF3 | 0-10" w.c. & 0-85 SCFM air |
| 2000-40VF4 | 0-10" w.c. & 0-200 SCFM air |
| 2000-40VF5 | 0-10" w.c. & 0-350 SCFM air |
- Progressive Venturi profile, low pressure loss
- Flow meter can be mounted vertically or horizontally, gauge head rotatable
- Dual-scale display (SCFM and "w.c.), flow conversion chart included
- Pipe sizes 1"~4", suitable for vacuum or pressure applications
Fan and compressed air flow measurement
Install the Venturi in the pipe and convert flow from differential pressure.
Combustion air flow monitoring
Measure combustion air flow and adjust with air-fuel ratio.
Need selection advice or bulk quotation?
Send us the working condition parameters (signal type, medium, range, pressure, temperature, connection method), and our engineers will provide a selection scheme and quotation within 1 working day.
- Phone consultation +86-21-66020232
- Email inquiry web@qishan-sh.com
