How accurate is conditioning orifice plate?
How accurate is conditioning orifice plate?
Assuming a Conditioning Orifice Plate is correctly placed and run within its prescribed range, its accuracy is usually ±0.5% to ±0.75% of the actual flow rate. Especially when upstream piping conditions are less than ideal, this degree of accuracy makes it comparable to or even better than a conventional orifice plate in many applications.
Key Points on Accuracy:
| Aspect | Conditioning Orifice Plate |
|---|---|
| Typical Accuracy | ±0.5% to ±0.75% of actual flow |
| Repeatability | High – typically around ±0.1% |
| Sensitivity to Flow Profile | Much lower than standard orifice plates; requires shorter straight-run pipe lengths |
| Installation Straight Run | As little as 2D upstream and 0D downstream (D = pipe diameter) |
| Flow Profile Conditioning | Integrated 4-hole design helps create a fully developed, symmetric flow profile |
| Application Suitability | Excellent for tight spaces, retrofits, and non-ideal piping layouts |
Comparison with Standard Orifice Plate:
| Feature | Standard Orifice Plate | Conditioning Orifice Plate |
|---|---|---|
| Accuracy | ±0.75% to ±1.5% | ±0.5% to ±0.75% |
| Straight Pipe Required | 10D to 40D (upstream) | 2D (upstream), 0D (downstream) |
| Flow Conditioning | Not included | Built-in (4-hole symmetric design) |
In applications where restricted straight-run piping makes perfect flow profiles difficult to attain, a Conditioning Orifice Plate provides great accuracy and reproducibility. While still satisfying industry standards like ISO 5167, it is particularly useful in space-constrained and retrofit setups.