The manual circular constant air volume valve is a mechanical automatic control device with a servo mechanism, suitable for air supply or exhaust systems requiring constant air volume control. It needs no external power, and its regulating performance is independent of air pressure.
The constant air volume regulating valve consists of a valve body, flow limiting valve plate, flow scale indicator, buffer air bag and cam.
The manual circular constant air volume valve is available in complete specifications. The diameters of standard products are 100, 125, 160, 200, 250, 315 and 400 mm. The valve body material is optional with galvanized steel sheet or stainless steel.
Technical Parameters
| Dimension | Air Volume(m3/h) | Error of Set Rated Flow Value (±%) | Minimum Total Pressure Drop(Pa) | Dimension | Air Volume(m3/h) | Error of Set Rated Flow Value (±%) | Minimum Total Pressure Drop(Pa) |
| 100 | 80 | 10 | 50 | 200 | 990 | 6 | 50 |
| 144 | 8 | 50 | 1296 | 5 | 50 | ||
| 216 | 6 | 50 | 250 | 522 | 10 | 50 | |
| 326 | 5 | 50 | 864 | 8 | 50 | ||
| 125 | 126 | 10 | 50 | 1566 | 6 | 50 | |
| 216 | 8 | 50 | 2088 | 5 | 50 | ||
| 360 | 6 | 50 | 315 | 828 | 10 | 50 | |
| 504 | 5 | 50 | 1368 | 8 | 50 | ||
| 160 | 216 | 10 | 50 | 2484 | 6 | 50 | |
| 378 | 8 | 50 | 3312 | 5 | 50 | ||
| 630 | 6 | 50 | 400 | 1260 | 10 | 50 | |
| 864 | 5 | 50 | 2520 | 8 | 50 | ||
| 200 | 324 | 10 | 50 | 3780 | 6 | 50 | |
| 666 | 8 | 50 | 5040 | 5 | 50 |