, Perrygraf Black, Sivalls, & Bryson Control Valve Size Calculator
Country of manufacture: USA,            Date of manufacture: ____
Overall length: 21.4 cm,          Width: 8.0 cm.,           Weight: 53.2 gms.
Materials: plastic shell with cardboard slide
Cursor: 4.6 X 8.9 X 0.5 cms; All-plastic, wrap-around; lines = one each on front and back, plus scale for correction factor K
Scales: specialized
Front: Press. Sum [ Press. Diff., Volumetric Flow Rate ] Valve Std. Air Coef C [ Inlet Temp. °F Abs] Molecular Weight [ Flow Coef Conversion Factor Fcv] Fluid Specific Gravity [ C ] D
Back: Pressure Sum [ Press. Diff., Flowrate ] Corr Factor K (on cursor), Valve Flow Coef Cv, Fluid Specific Gravity at Flowing Temp [ Pressure Drop Across Valve (Globe Valves, Angle Valves), Flowrate Through Valve ] Valve Flow Coef Cv [ Velocity ] Flowrate Through Valve
Condition: C4-C5 (Signs of minimal to normal use)
Came with: Black plastic-covered BSB Control Valve Sizing and Cv Books