BYPASS ROTAMETER (FLBPR)When fluid or gas flows through a taper tube containing a float, a pressure difference of
P1 and P2 is created between upper and lower side of the float. The float moves upwards by a force obtained by multiplying the pressure differential by the maximum cross sectional area of the float. Due to taper tube, as the float moves upwards, the fluid passing area increases as a result of which the differential pressure decreases. Upward movement of float stops when the dead load is dynamically balanced by the differential pressure. Tapering of metering tube is so designed that the vertical movement of the float becomes linearly proportional to the rate of flow and the scale is provided to read the position of the float, thus giving birth to flow rate indication. Based on Bernoulli’s theorem, the principle mentioned above can be theoretically expressed as follows. Usefulness where the measurement must be made in a hazardous or remote area, or where electric
power is either not available or would be potentially dangerous. Rangeability can be 5:1 or 7:1. Scale readings that can be graduated in direct units for flow in the main pipeline.
Changing the range or cleaning the tube without disassembling the meter or removing it from the bypass
line.
P1 and P2 is created between upper and lower side of the float. The float moves upwards by a force obtained by multiplying the pressure differential by the maximum cross sectional area of the float. Due to taper tube, as the float moves upwards, the fluid passing area increases as a result of which the differential pressure decreases. Upward movement of float stops when the dead load is dynamically balanced by the differential pressure. Tapering of metering tube is so designed that the vertical movement of the float becomes linearly proportional to the rate of flow and the scale is provided to read the position of the float, thus giving birth to flow rate indication. Based on Bernoulli’s theorem, the principle mentioned above can be theoretically expressed as follows. Usefulness where the measurement must be made in a hazardous or remote area, or where electric
power is either not available or would be potentially dangerous. Rangeability can be 5:1 or 7:1. Scale readings that can be graduated in direct units for flow in the main pipeline.
Changing the range or cleaning the tube without disassembling the meter or removing it from the bypass
line.
STANDARD RANGES FOR WATER AT 20°C
| Model | NB | Maximum Flowrate (M3/HR.) |
Model | Maximum NB (M3/HR.) |
Flowrate | ||
|---|---|---|---|---|---|---|---|
| FLGT-10-BPR-25 | FLMT-10-BPR-25 | 25 | 5 | FLGT-10-BPR-275 | FLMT-10-BPR-275 | 275 | 650 |
| FLGT-10-BPR-40 | FLMT-10-BPR-40 | 40 | 10 | FLGT-10-BPR-300 | FLMT-10-BPR-300 | 300 | 800 |
| FLGT-10-BPR-50 | FLMT-10-BPR-50 | 50 | 20 | FLGT-10-BPR-350 | FLMT-10-BPR-350 | 350 | 1000 |
| FLGT-10-BPR-80 | FLMT-10-BPR-80 | 80 | 36 | FLGT-10-BPR-400 | FLMT-10-BPR-400 | 400 | 1500 |
| FLGT-10-BPR-100 | FLMT-10-BPR-100 | 100 | 80 | FLGT-10-BPR-450 | FLMT-10-BPR-450 | 450 | 2000 |
| FLGT-10-BPR-125 | FLMT-10-BPR-125 | 125 | 125 | FLGT-10-BPR-500 | FLMT-10-BPR-500 | 500 | 2500 |
| FLGT-10-BPR-150 | FLMT-10-BPR-150 | 150 | 150 | FLGT-10-BPR-600 | FLMT-10-BPR-600 | 600 | 3000 |
| FLGT-10-BPR-200 | FLMT-10-BPR-200 | 200 | 320 | FLGT-10-BPR-700 | FLMT-10-BPR-700 | 700 | 4000 |
| FLGT-10-BPR-225 | FLMT-10-BPR-225 | 225 | 450 | FLGT-10-BPR-800 | FLMT-10-BPR-800 | 800 | 5000 |
| FLGT-10-BPR-250 | FLMT-10-BPR-250 | 250 | 550 | Other Sizes on request | |||
| Type of tapping: | Flange, D and D/2, corner |
|---|---|
| Accuracy : | ±2% of full flow |
| Rangeability: | 7:1 or 5:1 |
STANDARD MATERIAL OF CONSTRUCTION
Hi
| Orifice Flange | : SS 316 L, SS 316, SS 304, CS etc. |
|---|---|
| Orifice Plate | : SS 316, L, SS 316, SS 304, Hastelloy ‘C’,Monel, PVC etc. |
| Carrier Rings | : SS 316 L, SS 316, Mild steel, PP etc. |
| By Pass Line | : SS 316 L, SS 316, SS 304,Mild steel,PVCetc. |
| Wetted Parts of | : SS 316 L, SS 316, SS 304, Mild steel, |
| the Rotameter | PP etc. |
- Hi-low flow switch
- 4-20 mA transmitter
| Glass Tube Rotameter | : FLGT-10 |
|---|---|
| Metal Tube Rotameter | : FLMT-10 |