DANIELTM MODEL 788DVC DIGITAL CONTROL VALVES | D E C 2012 |
The main valve is full open when curves B, C, and D intersect Curve A. After they intersect, continue reading pressure drop curve from curve A. In applications requiring a constant pressure drop over 40 psid a heavy main valve spring must be used.
Curves A, B, C and D are based on water (specific gravity: 1.0). For liquids having a specific gravity of 0.8 or greater, multiply the pressure drop shown times the actual specific gravity. This results in the actual pressure drop. For specific gravities less than 0.8, use 0.8 to get the corrected pressure drop (curves B, C and D only).
Figure 3-1. Flow vs Pressure Loss
SPECIFICATIONS |
