Features:
- Accuracy of ±0.5 percent of reading and repeatability of ±0.1 percent.
- No need for additional straight run piping.
- Designed for fluids with a wide range of viscosities, as well as low flow rates.
- In high strength aluminum or stainless steel housing.
The Blancett Model B1750 positive displacement flow meter provides high measurement accuracy, trouble-free operation and long service life for fluids over a wide viscosity range. Applications include lubricants, fuels, chemicals, solvents, oils, and greases. The B1750 meter is bi-directional (using appropriate electronics) and has an extremely large turndown ratio, up to 400:1 in some models, with full accuracy at extremely low flow rates.
Operating Principle
Fluid entering the meter drives two gears. A non-intrusive sensor detects the movement of the gears and produces a sine wave pulse for each gear tooth that passes the path of the sensor face. The resulting pulse frequency is proportional to the actual flow rate, and it provides a highly accurate representation of the fluid flow. The meter is relatively insensitive to changes in viscosity and there is no need for straight run piping.
K-Factor
The K-factor represents the number of output pulses transmitted per unit volume of liquid passing through the positive displacement meter. Each meter has a unique K-factor that is determined during factory calibration. The K-factor is very constant and linear over the published flow range when liquid viscosity is greater than 100 CentiPoises. When liquid viscosity is less than 100 CentiPoises, positive displacement meters can experience “fluid slip” in the measuring chamber due to migration of liquid around the internal moving parts. As a result, the linear (constant K-factor portion) measuring range of the flow meter is reduced. At viscosities less than 30 CentiPoises, positive displacement meters maintain published linearity over a 10:1 turndown range from the maximum published flow rate.
For more information, please see Product Manual
Technical Details
| Material of Construction | |
| Body | 6061-T6 aluminum or 303 Stainless steel |
| Bearings | Stainless steel |
| O-Ring | Teflon® |
| Housing | 6061-T6 aluminum |
| Operating Temperature | |
| Aluminum | -20…185° F (-29…85° C) |
| Stainless Steel | -20…400° F (-29…204° C) |
| Pressure Rating | 5000 psi (345 bar) maximum |
| End Connections | Female NPT: 1/4 in., 3/4 in. or 1-1/4 in. (depending on meter size) |
| Turndown Ratio | 10:1 |
| Accuracy |
|
| Repeatability | ±0.1% |
| Calibration | Oil (NIST traceable) |
| Pickup | Optional |
| Bore Size in. | 1-1/4 |
| End Connection | 1-1/4 in. Female NPT |
| Max PSI | 5000 |
| Flow Ranges³ gpm (lpm) | 1…120 (3.8…454) |
| K factor² Pulse/Gallon | 800 |
| End to End Length in. (mm) | 7.00 (178.0) |
| Seal Material | Teflon Standard |
|
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