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DANIEL MODEL 788DVC DIGITAL CONTROL VALVES DEC 2012
TM
SPECIFICATIONS 3-3
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