Economical on large lines
A small rotameter and an orifice do the work of a large-bore meter, at a fraction of the cost.
Orifice and bypass assembly
Bypass Rotameter
Measure a large line without buying a large meter. A small rotameter reads a controlled bypass flow while an orifice does the work in the main line.
- Line sizes
- 2" and above
- Accuracy
- ± 2% of full flow
- Orifice plate
- SS304 / SS316
- Optional output
- 4-20 mA
Overview
A practical way to measure large flow
Measure a large line without buying a large meter. A small rotameter reads a controlled bypass flow while an orifice does the work in the main line.
Bypass rotameters are the most economical solution for flow measurement in large pipe lines and for large rates of flow. Use is limited to clean service: solid particles and slurries tend to clog the range orifice and may result in malfunctioning.
Also available without main line flanges, where the plant supplies its own.
Designed to standard
Orifice calculations and design are based on IS or BS standard.
Supplied complete
Orifice plate, carrier rings or flanges, bypass piping, isolation valve, fittings, range orifice and rotameter.
Alarms and output
Optional high and low alarms and 4-20 mA output where the reading has to leave the plinth.
Features
Standard assembly
| Line size | 2" and above |
|---|---|
| Orifice plate | SS304 / SS316 |
| Carrier rings / flanges | CS / forged and SS |
| Accuracy | +/- 2% of full flow |
| Assembly | Orifice plate, carrier ring or flanges for the main pipe line, bypass piping with isolation valve and fittings, range orifice and the rotameter |
| Orifice design standard | IS or BS standard |
| Options | Also available without main line flanges. Optional alarms and 4-20 mA output |
| Service limitation | Limited to clean service; solid particles and slurries tend to clog the range orifice |
Because the range orifice sets the reading, this assembly should not be used on fluids carrying solids or slurry. For those duties ask us about a metal tube rotameter or an electromagnetic flow meter.
We will size the complete bypass
Share the line size, fluid, flow range, pressure and temperature. We will size the orifice, bypass and rotameter as one working assembly.
- Fluid, specific gravity and concentration
- Flow or level range, and line size
- Operating pressure and temperature
- Material of construction and end connection
- Output, display and area classification